83313100C_BR3D4_Disk_Storage_Unit_Maintenance_Manual_Jul75 83313100C BR3D4 Disk Storage Unit Maintenance Manual Jul75
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CONTROL DATA
CORPORATION
(_. \.
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'-... ..
CONTROL DAT A®
BR3D4 DISk STORAGE UNIT
MAINTENANCE MANUAL
~-,
,
\
I
REVISION RECORD
DESCRIPTION
REVISION
A
(2-28-75)
Manual released.
B
(4-30-75)
Manual revised to include Engineering Change Orders PE35520B, PE35548A, Field
Change Order PE35604 and technical corrections affecting pages: 4-54, 4-79, 5-73,
5-75, 5-76.
C
(7-2l-75)
Includes engineering change order PE35604.
•
It
Manual revised to incorporate Enqineerinq Chanqe Orders PE39280B. PE39282.
PE39296, PE393ll, PE393l3A, PE39324, PE39337, Field Change Orders PE39282,
PE39296, PE393ll, PE39324 and technical corrections affecting pages: v, vi, 1-4,
3-16, 3-27, 3-36, 3-36.1/3-36.2 (added) , 3-37, 3-42.1/3-42.2 (added), 3-43,
3-44, '4-3, 4-5, 4-12, 4-13, 4-17, 4-22, 4-24, 4-28, 4-43, 4-55, 4-56, 4-63,
4-68, 4-69, 4-76, 5-2, 5-3, 5-7, 5-19, 5-21, 5-22, 5-24, 5-25, 5-27, 5-35,
5-40, 5-41, 5-56, 5-62.
Publication No.
83313100
•
Address comments concerning this
manual to:
Control Data Corporation
Technical Publications Dept.
1975
by Control Data Corporation
Printed in the United States of America
©
ii
7801 carputer Avenue
Minneapolis MN 55435
or use Comment Sheet in the back of
this manual.
83313100
C
PREFACE
1''''-
'\
This manual has been prepared for customer
engineers and other technical personnel
directly involved with maintaining the disk
storage unit (drive) ~
Section 3 - Corrective Maintenance. Provides
check/adjustment and replacement
information for various cO'l"q?Onents
and assemblies in the device.
Maintenance information is provided by five
sections in this manual. Section numbers
and a brief description of their contents
are listed below.
Section 4 - Diagrams. Contains logic diagrams am assanbly schEm3.tics.
Section 1 - Installation and Checkout.
Provides information on preparing the drive for initial use:
unpacking, power/signal cabling,
and initial checkout.
Section 5 - Wire Lists. Provides documentation on wiring for logic and
mechanical assemblies.
Manuals applicable to the BR3D4 Disk Storage
unit are as follows:
Publication No.
Section 2 - Preventive Maintenance.
Provides detailed procedures
on maintaining the equipment.
83313100
83313200
83313300
Title
Maintenance
Reference
Parts Data
c
()
83313100
A
iii/iv
c'
CONTENTS
j
.'
,
\ . •.••. 1
1.
INSTALLATION AND CHECKOUT
Maintenance Tools and Materials
3-2
3-3
Inspection
1-1
1-1
Uncrating
1-1
Leveling Pad Installation
1-2
1-2
Introduction
3-3
Installation Requirements
Sequencing Function Checks
3-5
Leveling and Aligning
1-5
Output Voltages Check
3-7
1-5
Interlock. Switches Check
3-7
1-5
1-5
Sequencing Safety Checks
Introduction
Power Wiring
Site Electrical Requirements
General Requirements
Power System Grounding
Requirements
System Grounding
1-5
1-6
Floor Grid Available
1-6
Floor Grid Not Available
1-6
AC Power Connections
1-6
Electrical Checks and Adjustments
Introduction
3-3
Power System Checks
3-3
Data Protection Sensing Check
3-8
3-9
Normal Retract Check
3-10
Speed Backup Check
3-10
Servo System Checks
3-10
General Checkout Criteria
3-10
Velocity Gain Adjustment
3-15
3-15
Signal Cabling
1-7
Coarse Position Gain
Adjustment
unit ID Selection
1-7
1-7
Integrator Gain Check and
Adjustment.
3-16
Servo Margin Test
3-16
Initial Checkout and Startup
2.
PREVENTIVE MAINTENANCE
On Cylinder Delay Check
3-16
Introduction
2-1
Fine position Test
3-17
Maintenance Materials
2-1
Level 3 Maintenance Procedures
2-1
Fine .position Offset Check
and Adjustment
3-18
2-1
Seek Timing Checks
3-18
Clean Pack Cover Glass
2-1
Track Servo Logic Checks
3-19
Clean Primary Filter
Velocity Logic Checks
3-21
Check Power Supply Outputs
2-1
2-2
Miscellaneous Logic Checkout
Inspect Servo and Read/Write
Heads
Clock/Index Timing
3-22
3-22
2-2
Start/Stop Time
3-22
Speed Sensing
3-22
Clean Shroud and Spindle
2-3
2-3
Power Up Clear
3-23
Clean and Lubricate Lockshaft
2-3
Inspect Actuator Assembly
Level 4 Maintenance Procedures
Clean Carriage Rails and
Bearings
Level 6 Maintenance Procedures
Replace Absolute Filter
3.
2-3
2-4
2-4
CORRECTIVE MAINTENANCE
Mechanical Corrective Maintenance
3-23
Actuator Replacement
3-23
Brake Belt
3-27
3-27
Adjustment
Replacement
3-27
Brake Pawl Assembly
3-29
Scope
3-1
Check
3-29
Safety Precautions
3-1
Adjustment
3-29
Maintenance preliminary Conditions
3-1
Replacement
3-30
Offline Operations
3-1
Manually Positioning Carriage
3-1
83313100
C
Carriage Assembly
Carriage/Spindle Alignment
3-30
3-30
v
a
Stop Check
3-32
Carriage Extended Stop
Adjustment
3-32
Carriage Retracted Stop
Adjustment
Switches and Indicators
4-5
XMTR Enables
4-6
3-33
Coil Assembly Replacement
3-33
Motor'Enable,Speed Detection
4-8
First Seek Interlock Assembly
3-33
Channel "I Tags
4-9
4-10
Check
3-33
Assembly "Replacement
3-33
Tag Decode
4-11
Motor Replacement
3-34
Channel I Bus Out Parity,Lap Decode
4-12
Switch Adjustment
3-34
Channel II Bus Out Parity
4-13
Switch Replacement
3-35
Gated Bus Out
4-14
3-35
Command Decode Part 1
4-15
3-35
Command Decode Part 2
4-16
3-36
Command Decode Part 3
4-17
Replacement
Drive M:>tor Repl.acarent SIC 11 & Above
3-36
Drive Motor Replucement
siC
4-7
Channel II Tags
Adjustment
lQ Without PE39280B & Below
Head/Arm Assemblies
3-36.1
3-39
Head/Arm Replacement
Criteria
3-39
Head/Arm Replacement
3-39
Head/Arm Alignment
Heads Loaded Switch
Adjustment
Replacement
Hysteresis Brake Replacement
Pack Sensor Switch
3-41
3-42
3-42
3-43
3-43
3-44
Check
3-44
Adjustment
3-44
Replacement
Servo Preamp PC Board Replacement
Side Panel Removal/Installation
Speed Sensor Assembly
Adjustment
Replacement
3-46
3-46
Replacement
4-20
Head Address Register
4-21
Cylinder Address Register
4-22
CAR/HAR Control, Diff CNTR Fanout
4-23
Difference Counter
4-24
Track Servo Dibits
4-25
Fine Servo, Fine Analog
4-26
Position Error
4-27
Velocity Summing Amplifier
4-28
EOT Detection
4-29
Cylinder Pulses, Fine Enable
4-30
On Cylinder
4-31
Seek Status
4-32
806 KHZ Clock
4-33
4-34
Sector Counter
Sector Register
4-36
4-37
Interrupts
4-38
Metering In
4-39
Static Diagnostics
4-40
Diagnostic Control
4-41
3-50
Monitor Mode
4-42
3-50
Mode/State Reset, Monitor Check
4-43
3-50
State Gates
4-44
Monitor Latches, States 1-4
4-45
Monitor Latches, States 5-8
4-46
3-47
3-47
3-48
3-48
Velocity Transducer or Magnet
Replacement
Offset and Start Seek
4-35
Lockshaft Replacement
Adjustment
4-18
4-19
Sector Pulse Circuit
3-46
3-48
Static Ground Spring
Channel Select and Reserve
Access Control
Index Detection
Spindle and Lockshaft Assembly
Spindle and Lockshaft
Replacement
4.
4-4
Resets Interlocks
Drive Belt
I
Monitor State Conditions (Tag 13)
3-49
3-50
DIAGRAMS
Introduction
4-1
Tag/Bus Decodes
4-3
Read/Write Enables
4-47
Diagnostic Read Lock-Up
4-48
Head Selection
4-49
('
vi
83313100 C,
(
'.
\
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,r-..
o
Fault Detection
4-50
AI-Power System
Device Check
4-51
Write Driver and Fault Detection
4-52
AGC+Volt Amp
4-53
Subassemblies Al ,A6 ,and Servo Wiring 4-76
Data Latch and Read Level Detection
4-54
Desired Velocity
4-55
Subassemblies A5,A7,Grounding and
Control Wiring
4-77
Subassemblies A2,A3,Control Wiring
4-78
DC Power Supply
4-79
Multiplexer Inputs Part 1
4-56
Multiplexer Inputs Part 2
4-57
Multiplexer Inputs Part 3
4-58
Multiplexer Inputs Part 4
4-59
Multiplexer Bits 0 and 1
4-60
Multiplexer Bits 2 and 3
4-61
Multiplexer Bits 4 and 5
4-62
Multiplexer Bits 6 and 7
4-63
Primary Wiring
4-75
A2-Logic Chassis
A3-Deck Assembly
Schematic
4-80
A4-0perator Panel
Schematic
4-81
AS-I/O Panel
Schematic
4-82
Signal Transmitters Part 1
4-64
5.
Signal Transmitters Part 2
4-65
Introduction
Signal Transmitters II Part 2
4-66
Wire Wrap Wire Lists
5-1
Signal Transmitters II Part 1
4-67
Non-Logic Wire Lists
5-1
WIRE LISTS
5-1
Channel I Receivers
4-68
Logic Wire Wrap
5-2
Channel II Receivers
4-69
Read/Write Wire Wrap
5-70
Data I/O Channel I
4-70
Logic Harness
5-72
Data I/O Channel II
4-71
Deck Harness
5-77
Tag 3 Multiplexer
4-72
Control Panel (W8 Harness)
5-80
Tester Interface
4-73
I/O Panel
5-82
Chassis Map
4-74
AC Harness
5-91
FIGURES
1-1
Pack Cover Latch
1-2
3-5
Servo System Test Points
3-11
1-2
Drive-Top View
1-2
3-6
Forward Seek Waveforms
3-14
1-3
Drive-Front View
1-3
3-7
1-4
Drive-Right Side View
1-3
1-5
Space Requirements
1-5
Velocity Gain Waveform
(Preliminary)
Velocity Gain Waveform (Final)
3-15
3-15
1-6
System Cabling
1-7
3-9
Coarse position Gain Waveform
3-16
Velocity Integrator Waveforms
3-17
3-8
1-7
unit Identification Assignment
1-9
3-10
2-1
Cabinet Filters
2-2
3-11
Fine Position Gain Waveform
3-17
2-2
Carriage Rails and Bearings
2-4
3-12
Track Servo Amplitude
3-20
position Converter Output
Waveform
3-21
3-1
Head Cam Tool Installation
3-2
3-13
3-2
Power Sequencing Trouble
Analysis Chart
3-4
3-14
Velocity Transducer Gain
Uniformity Waveform
3-21
Fine Enable switching Level
Waveform
3-22
Main Deck Topside
3-24
3-3
AC Power Supply Locator
(A1 Power Supply)
3-5
3-15
3-4
DC Power Supply Locator
(A2 Power Supply)
3-6
3-16
o
83313100
A
vii
3-17
3-18
3-19
Carriage Stop Adjustment
Rail Adjustment Tool
Lower Rail Adjustment
c.. Eccentrics
3-2.0
Brake Belt Adjustment
Brake Pla~e Replacement
3-21
Carriage Alignment
3-22
First Seek Interlock Assembly
3-23
Timing Motor/Switch
3-24
Replacement
Drive Belt Adjustment
3-25
Motor and Brake Assembly
3-26
3-25
3-26
3-26
3-28
3-29
3-31
3-34
3-27
3-28
3-29
3-30
3-31
3-32
3-33
3-34
3-35
3-36
3-37·
,Deck Assembly Bottom Side
Head Cable Clamping/Connecting
Head/Arm Assembly Identification
Head/Arm Installation and
Removal
Brake Pulley Adjustment
Pack Sensor Assembly
Speed Sensor Adjustment
Velocity Transducer
Replacement
3-38
3-39
3-40
Preventive Maintenance Index
Maintenance Tools and Materials
2-1
3-2
3-40
3-44
3-45
3-47
3-45
TABLES
1-1
1-2
viii
Installation Specifications
Input/Output Connector Pin
Assignment
1-4
2-1
3-1
1-8
83313100
A
r"'--":
I
\.
SECTION 1
INSTALLATION AND CHECKOUT
INTRODUCTION
•
__ I
This section contains a listing of the steps
involved in unpacking each unit. For air
shipment, each unit is covered with a plastic
dust shield enclosed within an outer corrugated fiberboard carton and then strapped to
a wooden pallet. For domestic surface shipment, each unit is packaged in the same manner as for air shipment but is not placed on
a wooden pallet. This permits each unit to
be moved about on its own casters.
WARNING
Use care when cutting straps as they
may whip when cut.
2.
WARNING
3.
Remove unit from skid.
4.
Remove filler tubes from top of pack
cover glass. Remove material (if
any) contained inside tubes.
NOTE
The pack cover is locked in place
by a manually operated latch. Open
cover by pulling upward on latch
until clear of catch (see Figure
1-1) •
Remove external packing material •.
5.
Lift pack cover.
SIDE VIEW
Figure 1-1.
83313100
A
j
The DSU weighs approximately 750 lbs
when crated. To prevent injury to
personnel or damage to unit, use
Rol-a-Lifts or equivalent to remove
unit from pallet.
UNCRATING
1.
Remove polypropylene straps securing
unit to skid and remove dust shield.
I
INSPECTION
When uncrating the units, inspect each carton
for possible shipping damage. All claims for
this type of damage should be filed with the
carrier involved. Most. crating materials
may be reused if reasonable care is taken
while uncrating. When uncrating is complete,
check off all parts listed in the Shipping
Bill accompanying the equipment. Di~ies,
missing items, damaged equipment, etc.,should
be reported to the CDC Account Sales Representative responsible for the equipment.
j
8064
Pack Cover Latch
1-1
6.
Remove logic chassis-to-frame
retainer.
7.
Swing logic chassis out.
8.
Remove all material shipped inside
unit.
Remove actuator shroud (see Figure
9.
18.
Thoroughly vacuum clean unit.
19.
Replace front panel.
20.
Replace side skins.
21.
Reposition pack cover.
22.
Swing logic chassis to closed position.
1-2) •
10.
Remove front panel.
11.
Remove side skins (if installed).
12.
Remove front deck hold-down bolts two places (see Figure 1-3).
LEVELING PAD INSTALLATION
Install leveling pads on each unit as follows:
13.
Remove shipping hardware holding
spindle motor plate (see Figure 1-4).
14.
Remove rear deck hold-down bolts two places. These bolts are identified by plastic plugs. Replace plugs
after removing hold-down bolts.
15.
Remove actuator tie-back cord.
16.
Remove logic chassis access cover
and check all modules for proper
seating. Replace access cover.
17.
Remove floor panel and roll cabinet
so that one corner hangs over opening floor.
2.
Working from opening, install leveling pad in bottom of unit and screw
in until pad clears floor.
3.
Repeat steps 1 and 2 for remaining
pads.
INSTALLATION REQUIREMENTS
Site space and environmental requirements
are listed in Table 1-1.
Replace actuator shroud.
LOGIC DOOR
HOLDING ASSEMBLY.
1.
Figure 1-5 illustrates recommended clearances
required for maintenance.
LACING CORD TIED AROUND ACTUATOR
HOLDING HEAD CARRIAGE RETRACTED.
CAUTION TAG ATTACt£Q
'
DECK HOLD DOWNS (REAR)(2)
LOGIC
CHASSIS
~
~~~~~IL.....J]
REAR DECK VIBRATION MOUNTINGS (2 PLACES)
DO NOT CONFUSE WITH REAR DECK
HOLD DOWN BOLTS.
CAUTION TAG AND PLASTIC CAP IN PLACE COVERING
REAR DECK HOLD DOWN BOLT.
TOP VIEW
(TOP COVER REMOVED)
(ACTUATOR SHROUD REMOVED)
Figure 1-2.
1-2,
8UI3
Drive-Top View
83313100
A
I I I
I
I I
I
I
ID
1~
II
~
DECK CASTING
L...----.J
DECK HOLD DOWNS
(FRONT)
(2 PLACES)
~~~.~FRAMECHANNEL
~
I
I
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FRONT VIEW
Figure 1-3.
BUI2
Drive - Front View
LOGIC DOOR HOLDING ASSEMBLY
~...
J?OGIC CHASSIS
MOTOR PLATE HOLDING SCREWS(2)
RIGHT SIDE VIEW
81
Figure 1-4.
83313100
A
BUll
Drive - Right Side View
1-3
TABLE 1-1.
INSTALLATION SPECIFICATIONS
PHYSICAL (Approximate)
I
Crated (Air)
Crated (Van)
Size
uncrated
Height
39.5 in.
42 in.
46 in.
width
22 in.
27 in.
27 in.
Depth
44.5 in.
48 in.
48 in.
Volume
---
31.5 ft 3
34.5 ft 3
Weight
660 1bs.
700 1bs.
740 1bs.
ENVIRONMENT:
Refer to Publication Number 83313200
POWER
Amps/Phase
Accessing
Standby
Consumption
60 Hz
50 Hz
60 Hz
50 Hz
2.0
2.5
8.0
8.5
1.3
True Power (KW)
0.4
0.5
1.2
Power Factor
0.9
0.9
0.7
0.6
BTU/Hour
1400
1750
4200
4500
Starting Current (Approximate and Non-Linear)
208V
Time
-
220V
-
0-6 sec.
38
40
6-8 sec.
38
25
8-10 sec.
20
12
10-12 sec.
12
8
12-14 sec.
8
--
Power Connector
Description
50 Hz
60 Hz
1-4
Connector
Mating Receptacle
5-po1e, 30 amp
CDC 17634300
CDC 17810700
220 vac, 3-phase
Hubble 45115
Hubble 45135
5-po1e, 20 amp
CDC 15005400
CDC 15006200
208 vac, 3-phase
Hubble 2511
Hubble 2514
83313100
C
t-------- 44.5 ------~
(
3.25
5.25
1.75
......----33.25-----..4
.....- - - 2 7 . 0 u - - - - - t
LEVELING PAD
80143
Figure 1-5.
Space Requirements
LEVELING AND ALIGNING
1.
Turn down leveling pads until casters
are completely off of floor.
2.
Place spirit level on main deck so
ends of level point to front and
rear of deck.
The site ac power system must have provisions
for correct equipment safety grounding. All
of the foll~wing conditions must be met:
1.
The branch circuit supplying ac
power to the drive must have safety
ground provisions. Therefore, this
circuit must include an insulated
grounding conductor that is identical
to the grounded and ungrounded brruxh
circuit conductors. The insulated
grounding conductor shall s~ow either
a green color or green with a yellow
strip.
3.
Adjust leveling pads until surface
is horizontal within three angular
degrees.
4.
Place spirit level on main deck so
ends of level point toward sides.
5.
Adjust leveling pads until surface
is horizontal within three angular
degrees.
2.
The grounding conductor specified in
step 1 is to be grounded at the
service equipment.
6.
Repeat procedure until main deck is
horizontal within three angular
degrees regardless of spirit level
orientation.
3.
All power receptacles (including
convenience outlets for oscillo~
and other test equipment) must be at
a common ground potential to prevent
shock hazards if two equipments are
touched simultaneously. Therefore,
all attachment-plug receptacles in
the vicinity of the drive are to be
of the grounding type; furthermore,
the grounding conductors serving
these receptacles are to be ~
to the same grounding conductor that
serves the drive.
POWER WIRING
sITe
Power System Grounding Requirements
ELECTRICAL REQUIREMENTS
General Requirements
Drive power requirements are listed in Publication Number 83313200.
C)
. 83313100
A
1-5
SYSTEM GROUNDING
The controller and its attached drives must
be connected to earth ground. The permissible grounding schemes, listed in preferred
order,are:
1.
2.
3.
Controller and drives connected to
qualified site floor ground. A
qualified ground would be a floor
grid where the horizontal and
vertical members of the grid are
mechanically secure and have ground
straps or their equivalent joining
them to assure a constant ground
potential. In turn, the grid must
be connected to earth ground. An
alternate qualified floor ground is
a grounding grid or grounding bus
system provided under the false
floor.
ing to the lengths required to go from drive
to drive, drive to controller,and controller
to earth ground. Crimp and solder a ~
lug (P/N 40125601) to the end of each strap.
Earth ground at the site may be available at
the main power distribution panel (if it is
connected to building ground), at the steel
plate in contact with the masonry below the
panel (if the panel is not connected to earth
ground), or to an earth ground bus. Connect
one end of a prepared ground strap to the
available gro.und.
Connect remainder of grounds as follows:
1.
Open logic;chassis.
2.
Controller and drives connected to
otherwise qualified floor grid,
except that floor. grid is isolated
from earth ground. In this case,
controller is then connected to
earth ground to ground the system.
Grounding block is mounted at the
bottom end of unit, next to I/O
panel. Loosen grounding block screw
that secures 3-foot length of ground
strap (other end of this strap is
not connected). Remove ground strap.
3.
No site floor grid available: controller and drives connected to each
other in a daisy chain configuration.
Controller connected to earth ground.
Attach two ground straps to this
screw. One strap will go to each of
the two closest drives. Tighten
screws.
4.
Repeat step 3 for remaining drives.
Drive closest to controller is to be
connected to controller ground.
5.
Connect controller to earth ground.
Floor Grid Available
If a floor grid is available (schemes 1 or
2), each drive is to be individually connected to the floor grid. Ground each drive
as follows:
1.
Open logic chassis.
2.
Grounding block is mounted at the
bottom end of unit, next to I/O
panel. Route braided strap with
free end into floor cutout.
3.
Drill 11/32-inch hole in grid.
4.
Secure strap lug to grid using screw
(P/N 17901524) and lockwasher (P/N
10126403). Lockwasher goes under
terminal lug.
Floor Grid Not Available
If a floor grid is not available, all of the
drives must be connected to the controller
in a daisy chain grounding configuration. In
turn, the controller must be connected to
earth ground.
The ground connections are via flat braided
shielding (P/N 93267009). cut this shield-
(-'
'--....
AC POWER CONNECTIONS
Each drive receives its ac power via a 6 foot
cable. This cable originates from the UNIT
POWER circuit breaker located in the AC
breaker box at the rear of the drive.
Although each drive receives three-phase
input power at the UNIT POWER circuit breaker,
only two phases are used per drive. All norors
are single-phase, connected phase-to-phase.
(Phase-to-Neutral on 50 Hz drives.)
In order to balance the power line load,
phases are rotated from drive-to-drive. The
first drive is connected between phases A
and B, the second between phases A and C,
with the third between phases Band C.
Therefore, each group of three drives presents a balanced load while operating.
Phasing is controlled by connecting wires
to the UNIT POWER circuit breaker. Phase
assignments are as follows:
xZ
Y
N
G
-
Phase A (black)
Phase B (red)
Phase C (orange
Neutral (white)
Ground (green)
c
1-6-
83313100
A
The green wire is safety ground. It is not
to be used as neutral as it is not a current
carrying ground. This wire connects to a
lug inside the UNIT POWER circuit breaker
box. Make sure that this is a secure connection.
of the pins and the jumpering scheme to
assign mechanism ID-C to the drive.
INITIAL CHECKOUT AND STARTUP
This procedure assumes that all of the preceding procedures have been completed.
Before performing this procedure, become
familiar with the safety precautions and
maintenance preliminary conditions specified
in Section 3. Proceed as follows:
SIGNAL CABLING
Each drive communicates with a controller by
means of two interconnecting cables. System
cables are illustrated in Figure 1-6. Signal
functions are listed in Table 1-2.
1.
Inspect read/write heads and track
servo head as specified in Preven~
tive Maintenance portion of Section
CAUTION
2.
When installing I/O cables,alternately tighten connector jackscrews
or connector damage may result.
CAUTION
Bearing damage can occur if alcohol
runs into spindle.
The I/O connectors are located on the frame
.below the logic chassis.
UNIT 10 SELECTION
2.
Wipe spindle clean with media cleaning solution dampened gauze.
3.
Using vacuum cleaner; remove dust or
dirt from interior of shroud and
cabinet.
The drive is assigned the desired physical
unit identification by installing jumper
wires across auxiliary connector A2JD90 at
the bottom of the logic chassis (wire wrap
side). Figure 1-7 shows the bit assignments
CONTROLLER
,.-
Lr-oILr-oI
A
B
B
.--
r.rE
r--
T
E
R
M
L..
T
E
R
M
B
A
B
A
A
' ... .,r'"1l
f If I f ..ll 1
T
E
R
M M
B
A
A
r-- r--
T
E
R
R
M
B
II
Lr-oI
L~
Li
B
A
I
A
, ...............
II
II
JI J5 J6 J2
JI J5 J6 J2
JI J5 J6 J2
JI J5 J6 J2
JI J5 J6 J2
JI J5 J6 J2
JI J5 J6 J2
JI J5 J6 J2
UNIT A
UNIT B
UNIT C
UNIT 0
UNIT E
UNIT F
UNIT G
UNIT H
~
i
PI
i
PI
-
i
PI
~
A = A CABLE
B=B CABLE
P = POWER CABLE
_L-
i
PI
i
PI
i
PI
80170
Figure 1-6.
System Cabling
,0
. 83313100
A
1-7
TABLE 1.2.
Signal Name
METERING IN A
METERING IN B
DRIVE SEL BUS B2 2 5
DRIVE SEL BUS B3 24
DRIVE SEL BUS B4 2 3
DRIVE SEL BUS B5 22
DRIVE SEL BUS B6 21
DRIVE SEL BUS B7 2°
TAG VALID
DEVICE CHECK
CTRL BUS IN BO 27
CTRL BUS IN Bl 2 6
CTRL BUS IN B2 2 5
CTRL BUS IN B3 24
CTRL BUS IN B4 2 3
CTRL BUS IN B5 22
CTRL BUS IN B6 21
CTRL BUS IN B7 2°
CTRL BUS PARITY
MOD SEL GATE
TAG BUS Bl 2°
TAG BUS B2 21
TAG BUS B4 22
TAG BUS B8 23
TAG BUS PARITY
TAG GATE
CTRL BUS OUT BO 27
CTRL BUS OUT Bl 2 6
CTRL BUS OUT B2 2 5
CTRL BUS OUT B3 24
CTRL BUS OUT B4 23
CTRL BUS OUT B5 22
CTRL BUS OUT B6 21
CTRL BUS OUT B7 2°
CTRL BUS OUT PARITY
SEQUENCE MOTOR START
SEQUENCE MOTOR HOLD
POWER ON SEQ COMPLETE
NOT USED
+24 VDC
1-8
INPUT/OUTPUT CONNECTOR PIN ASSIGNMENT
DSU Connector
Signal
Ground
BB
BC
AX
AL
AF
AM
AH
AT
AU
AV
AW
BE
BD
AN
S
Ii
t
U
Z
AA
AB
AC
AJ
AK
K
E
F
H
J
P
R
S
T
Y
AY
AP
AR
AS
BA
AZ
-p
-q
v
w
x
-y
AD
AE
-g
A
B
C
D
K
L
OM
a
N
U
V
W
D
X
Z
Ii
C
....l.
....
a
J
t
CK
CL
CP
CR
CS
CH
CN
CM
CC
CJ
Signal Direction
From
To
Drive
Drive
Drive
Drive,
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Drive
Drive
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Controller
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Drive
Controller
Controller
Drive
83313100
A
J090
ROW B
6
ROW A
0
0
0
V
0
4
0
V
2
0
~
SHOWN JUMPEREO
FOR UNIT IO-C
80171
Figure 1-7.
Unit Identification Assignment
CAUTION
The CE disk pack contains specially
recorded tracks of data. Extreme
care must be taken so that this data
is not modified or destroyed.
4.
Install CE disk pack.
5.
Open cabinet rear door. Verify that
all logic chassis cards are firmly
seated in their connectors. Check
all miscellaneous connectors to see
that they are properly seated.
6.
Open top cover and remove deck
cover~
7.
Check that logic cards next to positioner assembly are firmly seated.
Check that head connectors are
properly seated.
8.
Turn off UNIT POWER circuit breaker.
9.
Turn off all power supply circuit
breakers.
10.
Verify that drive is connected to
external power source and that
external breaker (if any) is on •
. 83313100
A
11.
Turn on UNIT POWER circuit breaker.
Blower motor begins to operate.
12.
Turn on all remaining power supply
circuit breakers. Power supply
elapsed time meter starts.
NOTE
Only one drive should be accelerating the pack at a time. The second
drive may be started after the first
drive reaches operating speed (approximately 20 seconds).
13.
Check all output voltages for nominal
settings.
14.
Press Operator panel START switch.
15.
Spindle drive motor and first seek
interlock motor start.
16.
Actuator drives carriage forward to
load heads (after IS-second First
Seek Interlock delay) •
1-9
17.
18.
Actuator moves heads to track 00 and
Physical Unit Identification indica~
tor on operator panel lights.
WARNING
Check head/arm alignment. If necessary, perform Head/Arm Alignment
procedure in Corrective Maintenance
section.
j
If unit fails to power down,refer to
Power Application procedure in Operation section of Reference manual.
19.
To stop spindle'motor,press operator
panel START switch. To remove power
to drive,turn off UNIT POWER circuit
breaker.
r"
..............
1-10
83313100
A
SECTION 2
PREVENTIVE MAINTENANCE
r-."\
~j
c
(~
\...../
INTRODUCTION
MAINTENANCE MATERIALS
Performance of the drive is dependent on the
proper and timely execution of a preventive
maintenance routine. Such a routine is provided by the Preventive Maintenance Index
(Table 2-1).
The materials used in the procedures of this
section are listed below:
The index consists of six levels based on a
calendar period or hours of operation (whichever comes first). The power supply elapsed
time meter keeps a cumulative record of hours
of operation. Perform preventive maintenance
in accordance with the indication of this
meter. The Procedure column, Table 2-1,
lists the title of the paragraph containing
the required instructions.
The following levels of scheduled preventive
maintenance are required:
Level 1 - Weekly or 150 hours (no preventive
maintenance scheduled)
Level 2 - Monthly or 500 hours (no preventive maintenance scheduled)
Level 3 - Quarterly or 1,500 hours
Level 4 - Semiannually or 3,000 hours
Level 5 - Annually or 6,000 hours (no preventive maintenance scheduled)
Filter Coat
Gauze, Lint-Free
Lubricant Paste
Media Cleaning Solution
Plastic Spatulas (or
wooden tongue depressor)
Tape, Adhesive
Lev'el
is a registered trademark of
Control Data Corporation.
LEVEL 3 MAINTENANCE PROCEDURES
INSPECT ACTUATOR ASSEMBLY
1.
Raise cabinet top cover.
2.
Remove deck cover.
3.
Inspect entire actuator for presence of dust and other foreign
materials. Pay particular attention
to following areas:
3
3
3
3
3
10
1
10
2
10
4
4
1
120
2
4
5
4
PREVENTIVE MAINTENANCE INDEX
Estimated
Time (Min)
Procedure
actuator assembly
Clean pack CXlVer glass
Clean priIrary fil ter*
Clleck power SUR>ly ootplts
Inspect servo and rea.d/
write heads
Clean shraJd and spindle
Clleck head/azm aligrment
Clean and lubricate lockshaft
Clean carriage rails and
Inspect
bearings
6
20
Replace absolute filter*
*Intervals are maximum times. Preventive
maintenance may be required more frequently depending on dust contamination
level of operating area.
83313100
A
CDC* 12210958
CDC 12209713
CDC 95016101
CDC 95033502
Commercially
available
Commercially
available
*CDC~
Level 6 - Biennially or 9,000 hours
TABLE 2-1.
Source
Material
4.
a.
Circular cu~out in face of
magnet assembly (receives voice
coil).
b.
Rail surfaces (particularly
horizontal surfaces) of carriage
track on which carriage ,and
bearing assembly travels.
Use lint-free gauze dampened with
media cleaning solution (not soaked)
to remove deposits or attracted
particles. Refer to Clean Carriage
Rails and Bearings procedure.
CLEAN PACK COVER GLASS
Use a lint-free gauze dampened (not soaked)
with media cleaning solution to remove
smudges and deposits from the glass in the
pack cover.
CLEAN PRIMARY FILTER
1.
Remove air filter from bottom of
blower assembly at front of cabinet
(Figure 2-1) by lifting upward on
2-1
a.
Measure +sv. Does meter read
+5.10 (to.Os) volts?
No
Yes
b.
!
): Release inner surface
or rear door. Adjust
potentiometer shaft on
edge of +sv regulator
card.
Measure -sv. Does meter read
-5.10 (to.OS) volts?
No
Yes
) Adj ust potentiometer
shaft on edge of -sv
regulator card.
ptocedure completed.
INSPECT SERVO AND READ/WRITE HEADS
1.
Stop spindle motor, open cabinet top
cover and remove deck cover.
NOTE
Use a suitably bright and directiona.l
light during the following steps.
Figure 2-1.
Cabinet Filters
2.
CAUTION
filter to compress upper channel
gasket so that bottom edge of filter
clears retaining trough. Pull
bottom of filter out then lower
filter.
2.
Agitate filter in mild detergent
solution. Rinse in reverse direction with a low-pressure nozzle.
3.
Shake any excess water from filters
and allow filters to dry before
proceeding.
4.
Spray filters thoroughly with Filter
Coat and install in unit.
Do not smoke while inspecting. Use
extreme care not to damage heads
with dental mirror. Gimbal spring
(holds head on end of floating arm)
is most liable to be damaged. If
gimbal spring is permanently bent,
entire head/arm assembly must b.e
replaced.
CHECK POWER SUPPLY OUTPUTS
1.
Open cabinet rear door.
2.
Start spindle motor and allow read/
write heads to load.
3.
Command a 32-track repeat seek (32
tracks forward and 32 tracks reverse
continuously) starting at track O.
4.
2-2
Use an AC/DC volt/ohmmeter to neasure
output voltages at corresponding
test jacks on logic chassis test
point panel.
Inspect heads as follows (carriage
must remain fully retracted):
3.
a.
Use dental mirror to inspect
face of each head for reddishbrown oxide deposits. Clean a
head only if deposits exist
(see step 3).
b.
If scratches are found, refer to
Head Replacement Criteria paragraph.
Clean heads (only if required) as
follows:
CAUTION
I):) not SI1Dke while cleaning. Ib not touch
a head face with fingers. When cleaning or
bIffering, always J1DVe tongue depressor
perpendicular to length of head/ann assanbly. Ib not leave residue an head faces.
T.raf.ped residual particles can result in
the loss of a head arxVor a soored disk.
83313100
A
a.
If oxide deposits are found, use
lint-free gauze on a wooden
tongue depressor to lightly drybuff head face. Check associated pack surface for cleanliness
and/or damage. If deposits are
removed,cleaning is completed.
b.
If oxide deposits are not removed, dampen (do not soak)
gauze with media cleaning solution and wipe head face. If
deposits are removed, use dry
gauze to lightly buff head face.
c.
If oxide deposits are not removed in step b, refer to Corrective Maintenance section.
Remove head/arm assembly from
carriage and repeat step b.
d.
5.
Apply a thin coat of Lubricant paste
to threads.
6.
Check for free movement of lockshaft
by depressing and checking that it
freely returns to its original position.
.
CLEAN CARRIAGE RAILS AND BEARINGS
1.
Set UNIT POWER circuit breaker to
OFF.'
2.
Remove disk pack.
3.
Open top cover and remove deck
cover.
4.
Clean rails and bearing surfaces
(Figure 2-2) with lint-free gauze
that is slightly dampened with media
cleaning solution. It is necessary
to manually move carriage to gain
access to all surfaces. Install
head cam tool per Head Cam Tool
Installation procedure, Section 3.
If oxide deposits still remain,
install a new head/arm assembly.
LEVEL 4 MAINTENANCE PROCEDURES
CLEAN SHROUD AND SPINDLE
1.
stop spindle motor.
2.
Open pack cover.
ACTUATOR
HOUSING
CAUTION
Keep any disk pack at least three
inches away from any part of the
magnet assembly.
3.
Remove disk pack.
4.
Clean shroud with a lint-free gauze
that is slightly dampened with mOClia
cleaning solution. Wipe shroud to
remove all dirt am Sl'CIXJges. '.lb:::n:cAlghly
wipe spindle surface.
5.
After cleaning shroud, use a wad of
adhesive-type tape and pick up any
particles that were not picked up
with gauze. Make certain that all
particles are removed from interior
of shroud.
VOICE
COIL
CLEAN AND LUBRICATE LOCKSHAFT
1.
Stop spindle motor.
2.
Open pack cover.
3.
Remove disk pack.
4.
Use lint-free gauze and a brush or
sharp instrument to clean lockshaft
threads on top end of spindle.
7S7A
Figure 2-2.
Carriage Rails and Bearings
t~'
83313100
A
2-3
5.
Wipe rails and bearing surfaces with
dry gauze.
S.
6.
Check for cleanliness by manually
moving carriage through operating
range. If any slight resistance to
free rolling is encountered, repeat
steps 4 and 5.
Refer to Clean Primary.Filter procedure and clean primary filter (do
not install primary filter until
instructed to).
6.
Remove nuts from two tie bolts above
filter and two screws at bottom of
output plenum. Remove tie bolts.
7.
Swing air plenum up and remove
absolute filter.
8.
Install replacement absolute filter
and air plenum.
9.
Secure filter and plenum with four
nuts and four tie bolts.
LEVEL 6 MAINTENANCE PROCEDURES
REPLACE ABSOLUTE
FILT~R
1.
Stop spindle motor.
2.
Remove disk pack.
10.
Install primary.filter.
3.
Set UNIT POWER circuit breaker to
OFF.
11.
Install cabinet front panel.
4.
Remove cabinet from pane·l.
12.
Set UNIT POWER circuit breaker to
ON. Allow blower to purge unit for
two minutes.
2-4
83313100
A
.-------.
",,--
"~,
I
•
~- ... ,
SECtiON 3
CORRECTIVE MAINTENANCE
'
..... /
SCOPE
This section contains the instructions for
drive maintenance. The information is provided in the form of Electrical Checks and
Adjustments, and Mechanical Corrective
Maintenance.
Manual operation of the positioner is possible if the yellow lead is disconnected
from the voice coil. Observe the following
safety precautions during manual operation:
1.
Before moving carriage to load heads
(without disk pack installed), install head cam tool per Manually
Positioning Carriage procedure.
2.
Before turning off power, or if
power to spindle motor is lost, immediately retract carriage. Otherwise heads will crash when disk
speed is insufficient to permit
heads to fly.
3.
Before reconnecting yellow lead,
make sure fingers are clear of
positioner. Rapid positioner movement will occur if difference
counter contains a value other than
1023 or if an emergency retract
condition exists.
SAFETY PRECAUTIONS
Observe the following safety precautions at
all times. Failure to do so may cause equipment damage and/or personal injury.
1.
Use care
system.
at AlTBl
breaker)
2.
C)
while working with power
Line ac voltages are present
(below UNIT POWER circuit
and inside power supply.
Keep hands away from positioner during seek operations or when reconnecting leads to voice coil. (Under
certain conditions, emergency retract
voltage may be present, causing
sudden reverse motion and head unloading. )
3.
Use caution while working near heads.
If heads are touched, fingerprints
can damage them. Clean heads immediately if they are touched.
4.
Keep front cover closed unless it
must be open for maintenance. This
prevents entrance of dust into pack
area.
Keep all watches, disk packs,meters,
and other test equipment at least
two feet away from voice coil magnet (with deck cover off).
5.
MANUALLY POSITIONING CARRIAGE
Manually positioning the carriage (with
power off and disk pack removed) requires
installation of the head cam tool.
1.
Open pack cover and remove disk pack.
2.
Close pack cover.
3.
Open top cover and remove deck
cover.
4.
Open pack cover.
5.
Remove voice coil yellow lead wire.
6.
Do not use customer disk pack.
Otherwise, customer data may be
destroyed.
6.
position head cam tool against head,
cam mounted on actuator (Figure 3-1)
using one hand.
7.
Do not use CE alignment disk pack
unless specifically directed. These
packs contain prerecorded alignment
data that can be destroyed if the
procedure requires the drive to
write. These alignment tracks cannot be generated in the field.
7.
8.
If unit fails to power down when
START switch is pressed,disconnect
yellow leadwire to voice coil and
manually retract heads before
troubleshooting malfunction.
With other hand, move carriage forward until head/arm assemblies enter
and begin to grasp tips of head cam
tool, while moving tool along with
forward movement of head/arm assemblies. When head/arm assembly
securely holds head cam tool,release
tool. Carriage is now free to move
without damaging R/W heads.
8.
To remove head cam tool, grasp head
cam tool and retract carriage until
head/arm assemblies release tool.
Remove tool.
9.
Connect voice coil yellow leadwire.
MAINTENANCE PRELIMINARY CONDITIONS
OFFLI NE OPERATIONS
10.
Install deck cover.
Certain procedures require execution of
operational commands (seek, read, etc.).
These commands may be derived by means of
the Field Test Unit.
11.
Close pack and top covers.
83313100
A
3-1
TABLE 3 -1. MAINTENANCE TOOLS
AND MATERIALS (CONT' D)
Description
Part Number
ax::
ax::
Card Extender (Full-Size)
lever Pbrce Gage (20-100 grans)
54109700
87399200
CDC 87007900
ax:: 87389800
ax:: 70430001
ax:: 12212196
ax:: 95109000
ax:: 75009100
ax:: 75212300
CDC 73678500
ax:: 73228100
ax:: 94363200
ax:: 94363201
IDct:ite, Grade C
IDctite Corp.
IDct:ite Primer, Grade N
Loctite Corp.
)lJlti-Vo1t:meter (Null Meter)
Non-Metal.1ic Feeler G:lge,0.005 in.
ax::
ax::
Card EKtracti.oo Tool
carriage Alignment Ann
carriage ~ Ring
CE
Disk
Pack
Cllip Extender-Chip Clip10g
Grease, Silicone
Head J\djust:l'llmt Tool
Head
can
Head Installation & IerDval Tool
Hex Key,
1/8 ilx:h
lever Force Gage (5-15 grans)
Mltdriver, lb1low Stan
OScilloscope, nml Trace
SRI
oscUloscope lbod
Figure 3-1.
Head Cam Tool Installation
MAINTENANCE TOOLS AND MATERIALS
The tools, test equipment, and materials
recommended for drive maintenance are listed
in Table 3-1.
TABLE 3-1. MAINTENANCE TOOLS
AND MATERIALS
Actuator Stop Adjustment
Tool
Adapter (3/16 Hex to 1/4 Sq)
Ball Ended Hex Driver (3/16 Hex)
Belt Tension Gauge
Cal:d EKt:eOOer (Half-Size)
Part Number
Tektronix
pin Straightener
Push-Pull Gage
R:dl J\djustment Tool
Rem:Mll Tool, 20-30 Gage
SCXlpe Probe Tip (Hatchet Type)
Shim Assart:IIent (used far carriage
stop adjusbJent ~ replacing
actuator)
Spirxlle AdjusbJent Tool
Torque ScrEwkiver
Tol:que ScrEwkiver Bit
'lbrqUe wrench,
Description
1/4 inch
~lt/o1'Imeter
ClX)I 87008000*
ax: 12262582
CDC 12263201
Wire
wrap Bit, 30
73576400
12205600
Excelite #6
Tektronix 454
or equivalent
Gage
Wire wrap Gm, Electric
Wire wrap Sleeve, 30 Gage
016-0083-00
CDC 87369400
CDC 12210836
ax:: 87053600
CDC 12259183
CDC 12212885
CDC 75039400
CDC 87059900
ax::
ax::
12218425
87016701
ax:: 12263205
Ballantine 345 or
equivalent digital
vo1tl1eter
ax:: 12218402
ax:: 12259111
ax:: 12218403
CDC 87390400
CDC 54099700
*~
is a registered traderrark of Centro1 Data
Cbrporation.
3-2
83313100
A
ELECTRICAL CHECKS AND ADJUSTMENTS
I
I
"-.
INTRODUCTION
The electrical adjustments should be performed prior to replacing any parts. This
ensures that apparent malfunctions are not
caused simply by misadjustments. Also,these
procedures should be performed whenever
logic cards or other electrical components
are repaired or replaced.
.
These adjustments are divided into
•
Power System - power supply voltages
and power sequencing.
•
Servo System - the 'parts involved in
moving the positioner to the
selected cylinder.
•
cludinginterlocks and data protection, perform all of the remaining power supply tests.
Proceed as follows:
1.
Load disk pack and close cover.
2.
Turn off all power supply circuit
breakers.
3.
set LOCAL/REMOTE switch to REMOTE.
4.
Open top cover from rear.
5.
Disconnect yellow lead from voice
coil.
6.
Verify that UNIT POWER circuit
breaker is on.
7.
Check if blower motor is operating.
If not, check:
Miscellaneous Logic - the remaining
logic in the drive not directly
applicable to the two systems
listed above.
Before performing any of these procedures,
be thoroughly familiar with the safety precautions and preliminary conditions specified earlier in this section.
b.
UNIT POWER circuit breaker.
c.
Line terminals of AlP2.
Check that +20Y indicator on DC
panel lights. If not, check for
+22v at A2TBl-1 (terminal board on
back of logic chassis). If present,
bulb is defective. If absent, check
+20Y fuses. If fuses are good,check
dc power panel AlCR7-l0+.
9.
Turn on +5 and -5 volt circuit
breakers.
Introduction
Figure 3-2 is a troubleshooting guide that
will assist in isolating m~lfunctions. Locations of parts within the AC power supply
are illustrated in Figure 3-3. Locations of
parts within the DC power supply are illustrated in Figure 3-4.
f
Site ac power available at
AlTBl.
8.
POWER SYSTEM CHECKS
The power system test procedure has been
subdivided into subchecks to permit trouble
analysis and checkout of specific system
functions. The first test, Sequencing
Functional Check, provides a quick check of
power supply sequencing. It does not, however, check all capabilities. For a complete power supply checkout, perform all
tests.
a.
10.
Set LOCAL/REMOTE switch to LOCAL.
Check' that MAINTENANCE indicator on
operator panel lights. If not:
a.
b.
Turn on ±20 circuit breakers on
power supply. Measure these
voltages from their respective
test points on maintenance panel
to ground. If +20v, -20v, and
-sv are all absent, ac power
panel Al and related rectifiers
are not supplying dc voltages.
Proceed to step c. If any voltages are present, proceed to
step g.
c.
Measure from AlQI terminal 3 to
ground. If not +20v, relay Kl
is not energized,(it should be).
Proceed to step d if voltage is
present.
CAUllON
Unless otherwise specified, sequence power from the controller
should be off when performing any
of these tests.
Sequencing Function Checks
,,--,
•
,
This procedure provides a quick check of the
power supply sequencing. For a complete
check of all power supply capabilities, in-
Measure from +5 test point on
maintenance panel to ground. If
+sv present, proceed directly
to step f; if absent, proceed
,to step b.
I
"--./
83313100
A
3-3
w
I
~
SEE NOTE
CD
PRELIMINARY CONDITIONS
I. ALL CIRCUIT BREAKERS CLOSED
2. PACK INSTALLED
3. PACK COVER CLOSED
4. LOCAL / REMOTE IN LOCAL
~. WRITE DISABLE SWITCH ON
6.START SWITCH ON
I.
2.
3.
4.
NOTES:
CD
CHECK',
SPEED OETECTION LOGIC
K2
INTERLOCK SWITCH
DRIVE BELT SLIPPING
T-r'&~~~'g. ~E~ss1.~9~:~~Lt~~YSIS.
NORMAL POWER UP SEQUENCE.
CHECK;
I. K~
2. K2 CONTACTS R2IR3
3. !. 46 V POWER
4. POWER AMP BD
5.LDAD LOGIC
6. SERVO LOGIC
co
w
W
I-'
W
I-'
o
o
8Y3I
Figure 3-2.
)I
Power Sequencing Trouble Analysis Chart
'\
r~
\
,
/\
"
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)
CRI-2
CR3-4
TB4
CB2
TB2
T2
~
C
CI3
CI2
. TB3
SUB-ASSEMBLY
A6- ±.46V RECTIFIER BOARD
Figure 3-3.
83313100
A
T3
BD24C
AC Power Supply Locator (AI Power Supply)
3-5
SUB -ASSE MBLIE S
A I - POWE R AMP BOARD
A3 - SENSING BOARD
A5 - +5 VOLT REGULATOR
A 7 - -5 VOLT REGULATOR
LOCAL/REMOTE
SWITCH
Figure 3-4.
3-6
8D23B
(~'
DC Power Supply Locator (A2 Power Supply)
83313100
A
d.
e.
f.
g.
11.
Measure resistance from AlQl-4
to ground. If not zero ohms,
interlock wiring from ±S circuit
breakers is open or circuit
breaker auxiliary contacts are
defective. Proceed to step e.
Measure voltage across pins 1
and 2 of AlQl. If not less than
about 2v ac, AlQl is faulty (it
should be acting as a closed
switch). Otherwise, check AlT2
and its associated components.
This step applies if +5v is
present in step a. Problem is
caused by lack of operator panel
lamp power. Measure from A2TBl-S
to ground. If +20v, check lamp
driver logic. If not +20v,
sensing board A2A3 (+Sv sense)
is not supplying power to lamps
on operator panel; perform Data
Protection Sensing Check.
This step applies if voltage
other than +Sv could be measured
in step b. Problem is lack of
+Sv. Measure from A2TBl-3 to
ground. If voltage is not +9v,
check AlTB2-8 for +9v; if absent,
CRS, CR6 OR T2 may be suspected.
If +9v is present at A2TBl-3,
regulator A2A3 is faulty.
Turn on remaining circuit breakers.
NOTE
If any of the following conditions
are not met, refer to Sequencing
Safety Check for troubleshooting
information.
12.
13.
14.
15.
Fully load heads on pack, then
position them near ramp.
16.
Reconnect yellow lead to voice coil.
It should not retract. If it does,
perform Data Protection Sensing
Check.
(Retract relay KS is deenergized, causing emergency retract
condition. )
17.
Turn off UNIT POWER circuit breaker.
Carriage must immediately retract
(simulated emergency retract condition). If not, immediately retract
heads manually to prevent them from
crashing as spindle motor slows.
Check retract relay K5 for sticking
and check actuator for: open coil or
broken straps.
Output Voltages Check
Perforn1 .:he following check with the drive
performing continuous 32-track seeks. The
±Sv power is adjusted in the Preventive
Maintenance procedure. The ±20v, ±20Y, and
±46 voltages are not adjustable. With the
exception of the ±46v and ±20Y power, all
measurements should be made by connecting a
voltmeter between the applicable test point
and ground on the test point panel.
1.
+20 (+2.4, -0.2) vdc.
2.
-20 (-2.4, +0.2) vdc.
3.
+5 (±O.OS) vdc.
4•
- 5 ( ±0 " 05) vdc •
5.
Measure +20Y by connecting positive
lead to A2TBl-5 to ground. .It must
be +22 (±2.0) vdc. This terminal
board is on the wire wrap side of
the logic chassis.
6.
Measure ±46 vdc at TBI on the back
of power amplifier assembly AI.
Ground is available on A2AlTBl-6.
Press START switch. If it does not
light, check interlocks. Observe
that the following. occur:
a.
Spindle motor starts.
b.
First Seek Interlock motor
starts.
After about 15 seconds,interlock
motor must complete one revolution
and stop.
(When START was pressed,
interlock motor may have been
partially through one cycle because
of other checks. This could cause
two motor revolutions before motor
stops or else drive belt may be
slipping. )
Manually move actuat"or forward until
heads loaded switch transfers.
a.
+46 (±2) vdc at A2AlTBl-2.
b.
-46 (±2) vdc at A2AlTBl-10.
Interlock Switches Check
This procedure verifies that the power interlock is functioning. The pack need not be
installed. Proceed as follows:
1.
Set LOCAL/REMOTE switch on power
supply to REMOTE.
( - ..
~)
83313100
A
3-7
2.
Turn on all circuit breakers.
7.
Press (to extinguish) START.
3~
Close all covers.
8.
Install pack and close cover.
9.
Press (to light) START switch.
Observe effects specified in steps
10 and 11.
NOTE
Interlocks may be checked by three
test points on terminal board (A2TBl)
of wire wrap side of the logic
chassis. These test points will be
at ground potential if the following
conditions are met:
a.
A2TB2-l5 if circuit breakers
auxiliary contacts are closed.
b.
A2TBl-lO if condition a is met
and if pack cover is closed.
c.
4.
10.
Spindle motor must start.
6.
Close cover and note that START
indicator lights again.
b.
Check if relay K3 is energized.
If motor is humming (trying to
start), measure voltage across
pins 1 and 2 of AlQ4. It should
be low (about Iv); if high
(about 100 vac), AlQ4 is defective or motor start capacitor
is faulty.
If motor is not trying to start,
check pins 1 and 2 or AlQ2 and
AlQ3; they should also have low
voltage drop. If all voltages
are correct, motor may be faulty.
11.
First seek interlock motor must
start (with 15 seconds required for
full motor cycle). If not:
a.
Check A2TB4-8 for 24 vac to
ground.
b.
Check contacts of K2, K3, and
'interlock switch.
c.
While performing previous checks,
motor may have rotated partially
through its cycle. It may first
complete this partial cycle before beginning full cycle. If
two cycles are required, the
motor drive belt may be slipping
(interlock motor cycles continue
until speed enables relay K2).
Sequencing Saftey Checks
This-procedure verifies that the power sequencing interlocks and logic are functioning correctly. Start this procedure without
a pack installed. Proceed as follows:
1.
Open top cover from rear.
2.
Remove deck cover.
3.
Disconnect yellow lead from voice
coil.
4.
Turn on all circuit breakers.
5.
Press (to light indicator) START
switch.
6.
Set LOCAL/REMOTE switch on power
supply to LOCAL. Observe the following:
a.
b.
3-8
Drive motor does not start. If
it does, check Pack On switch.
If switch is not misadjusted or
defective, proceed to step b.
If motor relay K3 is energized,
logic is defective.
(Motor must
not start with pack off.)
If not:
Check for ground at logic pin
B12-9A. If at +20v, logic is
faulty. If at ground, wiring
or +5v sense of sensing board
AlA3 is faulty.
(The +5v sense
is required to pull relays K2
and K3.
Press START switch. Indicator must
light; if not, check interlock test
points specified in preceding note.
If they are all at ground, remove
lens and lamp; check socket for +20v
and ground.
Open pack cover. START indicator
must go out; if not, pack cover
interlock may be defective.
...
a.
A2TBl-14 if condition b is met
and START switch is on.
5.
'
12.
,r· . . . ·
After First Seek Interlock motor
completes one cycle (15 seconds), it
must stop. If not:
a.
Speed detection logic may be
faulty.
b.
Relay K2 or interlock switch
may be faulty.
c.
If two or more cycles are required, malfunctions could be
caused by drive belt slippage
or low line voltage. Also,
AlQ4 could be shorted, not allowingmmotor to attain full speed.
83313100
A
c
Motor will eventually become
overheated, tripping DRIVE MOTOR
circuit breaker. Normally, speed
is attained before completion of
first seek interlock cycle delay.
This energizes K2 which, in turn,
energizes Retract relay Ks. If
not up to speed before completion of first seek interlock
cycle, speed detection enable
is disabled by Speed Enable FF.
K2 remains de-energized and
another first seek interlock
delay starts. Heads cannot load
during first seek interlock
delay.
13.
When up to speed, manually move
actuator forward until heads loaded
switch transfers. Relay K6 must be
energized. If not, switch is faulty
or misadjusted.
14.
Press (to extinguish) 'START switch.
Motor must not stop because heads
are still loaded. If it does, immediately retract heads to prevent
crashing and check logic.
15.
Move actuator to reverse stop.
serve that pack stops.
16.
Reconnect yellow lead to voice coil.
7.
Open top cover.
2.
Remove deck cover.
3.
Disconnect yellow lead from voice
coil.
4.
Turn on all circuit breakers.
5.
If necessary, press (to extinguish)
START switch.
NOTE
While performing steps 6 and 7,
observe operator panel indicators.
6.
83313100
Set LOCAL/REMOTE switch to LOCAL.
Indicators must not blink except for
unit Number Indicator. Drive motor
must not jerk.
A
Check transistors Q4, Qs, and
Q7 (along with their associated
circuitry) on board A2A3. This
is +sv sense function. Lamp
drivers and K3 also receive
power from +sv sense circuit.
b.
If +9.7v power drops, this circuit should drop K3 power, to
prevent write power during
emergency retracts, before remainder of dc power decays.
Set LOCAL/REMOTE switch to LOCAL to
enable dc power.
9•
Discharge emergency retract capacitor
by temporarily touching voice coil
yellow lead to voice coil terminal.
~!ake sure leadwire is disconnected.
CAUTION
While performing following step 10,
move heads forward far enough to
cause heads loaded switch to transfer, but not far enough so that
heads contact each other. Otherwise,' heads will be damaged.
Data Protection Sensing Chock
1.
a.
8.
Ob-
This procedure verifies that the sensing
function of board AlA3 is functioning to
prevent writing capability during an emergency retract. It also checks the voltage
and current fault detection. An emergency
retract condition is also generated. With a
pack installed, proceed as follows:
Set LOCAL/REMOTE switch back to
REMOTE. Indicators must not blink
and drive motor must not jerk. If
conditions of steps 6 and 7 are not
met:
10.
Move actuator forward until heads
load.
11.
Fully retract heads.
12.
Observe that SELECT LOCK indicator
is on. It should be caused by current and -volt faults.
'
a.
Current fault is result of write
driving circuitry sensing that
heads loaded switch is transferred and that write voltage
(+20v) is off because Speed
relay K2 is de-energized.
b.
-Volt fault is sensed by A2A3-Ql
because heads are loaded and -16
volt emergency retract voltage
is inadequate when switch first
closes.
13.
Reconnect yellow lead to voice coil.
14.
Press 'SELECT LOCK switch to clear
error.
15.
Load disk pack. Press START to
allow normal power-up first seek.
3-9
16.
Turn off UNIT POWER circuit breaker.
Observe that carriage immediately
retracts. This is emergency retract
function provided by A2C2 and normally-closed contacts of Retract
relay KS.
1.
Set LOCAL/REMOTE switch on power
supply to REMOTE.
2.
Verify that +20Y indicator is on.
3.
Open dc power supply front panel.
4.
Remove protective cover from speed
relay K2.
"
Normal Retract Check
This procedure verifies that the sensing
function of board A2A3 is functioning to
allow the actuator to retract at the normal
controlled velocity when system sequence
power is dropped. A pack need not be installed. Proceed as follows:
Open top cover.
2.
Set LOCAL/REMOTE switch to REMOTE.
3.
Remove deck cover.
4.
Make sure voice coil yellow lead is
connected to its proper terminal.
Perform step 5 gently to prevent
damage to relay contacts.
CAUTION
While performing following step 5,
move heads forward far enough to
cause heads loaded switch to transfer, but not far enough so that
heads contact each other. Otherwise,
heads will be damaged.
5.
Move actuator forward until heads
load. An immediate hold back force
should be encountered. If not:
a.
Check for +Sv at logic chassis
test point panel. If absent,
proceed to step b; if present,
proceed to step c.
b.
Check 03 and its associated components on sensing board A2A3.
This transistor holds Sv power
on during a normal retract until
the heads unload.
c.
Fault is caused by K6 malfunctioning. When heads loaded
switch transfers, K6 relay should
charge retract capacitor A2C2 to
-16v.
Speed Backup Check
This procedure verifies that the heads cannot load until speed is attained. This
function is normally under logic control;
however, if the primary speed detection logic
fails, the speed backup should also prevent
the heads from loading onto a slow pack.
Proceed as follows:
....
CAUTION
5.
1.
~,
Press K2 clapper. Verify that retract relay KS does not energize. If
it does:
a.
Check A2A3Pl-13 (drive motor
interlock to sensing board A2A3).
If not ground, motor centrifugal
switch is malfunctioning. This
switch should remain closed
(providing ground) until motor
speed exceeds about 2,000 rpm.
b.
If test point in step a is ground,
check 06 and 02 and their associated circuitry on board A2A3.
6.
Replace relay K2 relay cover.
7.
Close dc power supply.
SERVO SYSTEM CHECKS
Figure 3-5 is a simplified diagram of the
servo subsystem. This illustration bXUcates
the primary test points used' for checking
and aligning the servo loop along with a
brief explanation of the various signals,
their test points, and the applicable checkout procedure. Servo test point waveforms
for various seek lengths are shown in Figure
3-6.
General Checkout Criteria
Of the procedures listed in Figure 3-S,only
the procedures listed below are adjustments.
The remainder are checks to verify proper
operation.
•
Velocity Gain Adjustment
•
Coarse Position Gain Adjustment
•
Integrator Gain Adjustment
•
Fine position Offset Adjustment
c=
3-10
83313100
A
o
C)
(\
\
co
w
w
....,
Provides positive bias to summinll amplifier
during Load sequences. This caUSl:S forward
velocity of 7 ips.
w
....,
o
o
>
,j
A13-148
Set to complement ot nWllber of tracks to
go. Incremented by each Gated Cylinder
Pulse. Counter is full (1023) when 'f-O.
TESTED BY:
Return to Zero Seek
(Cyls 000 and 822)
A13-0lA
Provides analog error signal proportional
to distance to go. 10v till T< 128 then steps
down. Output then controlled by D/A converter. (Output equals 0 volts when TaO).
Provides negative bias to summing
amplifier during RTZ sequences. This
causes reverse velocity of 7 ips.
TESTED BY:
~~~'>C"'\
TESTED BY:
POSi/'
.."
CO='ri".~" C"~'
TESTED BY:
Return to Zero Seek
(Cyls 000 and 822)
+5V
POSITION
.
CONVERTER A27.TP-8
A27-98
Generates position error signal. Nonlinear feedback varies gain during last
128 tracks. Staircase output Crom position
converter is smoothed by sawtooth output
Crom velocity integrator.
~
I/O
INPUT
TESTED BY:
Integrator Gain Adjustment
Long Seek Check
Coarse Position Gain Adjustment
DESIRED
VELOCITY
A23-108
_I
_,_
tr.':.~r~lAZ7 TP~)
V
OFF
t-----004-1 A2~06
~3) ~'-
DESIRED VELOCITY
A2783
VOICE
COIL
TESTED BY:
Coune Pontloo Gain Adj.
Clamped off until T'-128. Then
provides sawtooth that is integrated
representation of velocity between
cylinder pulses. Output is positivegoing during forward seeks.
C~RENT
FINE
GATE
S~~3
}
.1
TESTED BY:
Integrator Gain Adjustment
Velocity Transducer Gain Unitormity
Adjusts gain ot velocity integrator so that
Its sawtooth waveform is of correct amplltude to cause smooth ramp output from
desired velocity function generator.
U1gh when oU"put of velocity integrator
indicp.tes that position hllS travelled about
one-half track since last cylinder pulse.
Also high if either forward or reverse
EOT is up. Pulled low by gated cylinder
pulses.
/
A27.TP-D
• INTEGRATED VELOCITY
I
TESTED BY:
Fine Eile Switching Level
\
Disables coarse gate and enables fine gate.
Fine also disables (clamps ort) velocity
integrator and enables On Cylinder detection.
-.?'C __...........!ENSE
(
A27,TP-E
)
~t~~
Test point providing voltage proportional
to voice coil current. llL"lmum until
position error and velocity Signals cancel
(accelerate phase); returns to zero to
maintain 60 ips (coast phase); switches
polarit~- at T< 128 (brake phase); and returns to zero (stopped).
TESTED BY:
Fine Enable Switching Level
Set for optimum servo performance.
A25-168
FWD-+ REV EOT
w
TESTED BY:
Velocity Gain Adj.
"
VELOCITY
GAIN
ADJUSTMENT
....,I
....,
Figure 3-5.
Servo System Test Points (Sheet 1 of 3) .
1'138-1
w
I
I-'
IV
A25,TP-G
SEEK
NO DI81TS
+ REV
UNLOAD HEADS. SPEED
EOT PULSE
EDT ENABLE
CYL PULSE
EOT ENABLE
INTEGRATOR
FROM SHEET I
VELOCITY
I
I I r>
~ A2900
.1'
TP-C is high (about +12v) until integrated
velocity exceeds +l.28v. Output is then
about -12v (causing Forward EDT Enable
to go low) until integrated velocity drops _ _ _1 - . . ' - below +1. 10v.
.
p
I -
L ".I
INTEGRATED VELOCITY
n_
0 A25 -48
0
A25-5D
A25
r~'
r~
Provides sawtooth waveform whose amplitude
is proportional to distance travelled. Output is
positive-going during forward seeks. Output is
TP-B is -12v until integrated velocity is
more negative than.-1.26v. Output then
goes to +12v (causing Reverse EDT Enable
to go low) until integrated velocity is more
positive than -1.IOv.
'.
f;~f.edi~i!e~~c~~;t =~t;;~~!:ko~~~~O;;~-G
reverse EDT pulse. (or no dibits) and each cylinder
pulse. Output increases with distance (velocity
integrated with time) when A2S. TP-G is +14v.
Indicates forward EDT (error). Set by
even dibits with Forward EDT Epahle
high. Cleared by odd dibits. Reverse
EDT. or heads unloaded.
TESTED BY:
Return to Zero Seek (Cyls 000 and 822)
Seek into Forward EDT
TESTED BY:
Seek into Forward EDT
/
A21-58
A22-17A
Indicates reverse EDT: error or Loadl
RTZ sequence. Cleared by even dibits.
SERVO
HEAD
TESTED BY:'
. '. Return. to Zero Seek (Cyls 000 and 822)
/
822-48
Separate dibits. If observing dibits at
TP-X. TP-W is negatlve during positive
transition; TP-X is negative. during
negative dibit transition.
NOTE·.
CD
en
TEST POINT IS GND TO ENABLE GATE
ytHEN NAMED FUNCTION IS ENABLED.
ens·z
(.oJ
(.oJ
I-'
(.oJ
I-'
o
o
Figure 3-5.
)I
()
Servo System Test Points (Sheet 2 of 3)
r,
/
')
~:
(\,
',-
-
,r
.'
en
w
w
....
o
Provides position error signal via Cine
gate during last one-hal! track of seek •
Signal phasing is selected to oppose velocity
signal. Therefore. signal slope is negativegoing during last one-hal! track of forward
seeks and positive-going during last one-hal!
track of reverse seeks.
~
>
TESTED BY:
One Track Seek Test
....w
o
TRACK
SERVO
SIGNAL
n
-
1...]:
CYL
PULSE
DETECT
I~
... :
:
-
•
• :
j
P
AZ6-I2B
~A26-9B
.21-8B
'10...
A21-7B
LSE -.SLA23-2A
FINE
ANALOG
Cylinder Detect A (A3002).
Cylinder Detect B (A3003).
Cylinder pulse is generated when A and B
are both high. A3003 switches low when
positive-going track servo signal exceeds
+0.4v; it switches back high when negativegoing signal reaches zero volt. A2002
switches low when negative-going track
servo signal is more negative than -0.4v;
it switches back high when pOSitive-going
signal reaches zero volt. Combination of
these two effects results in cylinder pulse.
Track servo signal is double inverted
for seek to odd track. With TP-F=Ov
A26Q2 is turned on.
TESTED BY:
Long Seek Test
One Track SeE'k Test
• B13-12A
TP is low when heads are close enough to be considered On Cylinder. When fine position signal is
negative-going from a positive polarity (reverse
seek). TP-B goes low when signal is less than
+0. 3v and stays low until fine position signal is
more negative than -0.7v. When fine position
signal is pOSitive-going from negative polarity
(forward seek). TP goes low when Signal is less
negative than -0. 3v and stays low until fine position signal is greater than +0. 7v. TP cannot go
low unless heads are loaded and Fine FF is set.
TESTED BY:
Cylinder Pulse Switching Level Check
TESTED BY:
Velocity Gain Adjustment
0. C,HM"
'1""1"
Lml
Ch~'
Switches low when A2S. TP-B goes low
switches high (to set On Cylinder FF)
1.75 ms later.
iiN"C'Yi:
/
INASLt
~!:!~.)u
TO SHEET 2 (A))o.~-.;..-_----4
/~.~
/'' .,
Provides analog signal used as track servo Signal'/AZ6'TP-~
Polarity is negative when servo head is sensing
\.l.J
outer guard band (reverse EOT) or if odd (positive)
dibit component is greater than even (negative)
dibit component.
);on.inal is -2v. Range from
o min. gain to -12v max. gain.
Track Servo Signal is singlely inverted:
Seek is to odd track. With TP-G=Dv.
A26Q2 is turned on.
FF Is orr.
(+14v=Odd Cyi)
TESTED BY:
Track Servo Amplitude Check
AGe Amplifier Check
OFFSET
(FROM SHEET
...--:-.-
~.TP-o •
FINE GATE
\
ISHEETZ!
Provides fine servo signal to On Cylinder
dd':ction and summing amplifier.
+
,
A26-Q4
b
ELECT
OFFSET
ADJ
Switches high when On C~'linder
Enable goes high. Switches low
(to clear On Cylinder FF) 800
microseconds later.
' - Permits slight offset of read/write heads from
nominal track centerline. TP-E is poSitive when
controller command calls for head movement
toward spindle. TP-E is negative for command
of head movement away from spindle.
II
TESTED BY:
Carriage Offset Voltage Check
W
....WI
Figure 3-5.
TESTED BY:
On Cylinder Delay Check
Servo System Test Points (Sheet 3 of 3)
NOTES:
TEST POINT IS +14V (DISABLING GATE)
WHEN ODD CYL FF IS SET.
CD
®
TEST POINT IS GND (ENABLING GATE)
WHEN ODD CYL FF IS SET.
IUI-:!
W
I
I-'
SIGNAL
~
TEST
POINT
VERT
SCALE
HORIZONTAL SCALE
I MS/CM
2 TRACK SEEK
I MS/CM
16 TRACK SEEK
•-.. ---- -- . _-- . -.. _........
5 MS/CM
256 TRACK SEEK
10 MS/CM
822 TRACK SEEK
..............................•........................
_.......
@
TRACK SERVO
®
ON CYLINDER ENABLE
©
®
®
FINE SERVO
FINE GATE
VELOCITY TRANSDUCER
I V/CM
A26-7B
5V/CM
•
•
IV/CM
•
•
5V/CM
•
•
•_
•
~
•.....................
_ . . ._._._._
..•
......
._.
.
. ..
. . . . • . . . . . . ...............
......
B27-5A
-..-
.......... -
... ...
................................
......................
_..........................................................................
A27, TP-E
.....................................................................................
®
DESIRED VELOCITY
A27, TP-C
SEE INSERT
co
w
W
I-'
W
I-'
- ..........- ........
~
~
~
I!~ftrtltlllill !U~tlllli !v/!ctlllrri
T<128
NOTE:
I. SYNC (-) ON FORWARD SEEK (A27-12A)
o
•
ttil-II-Ill il-ll ~;g.!tlll EmmH§
~ttittlttl
A27, TP-F
2V/CM
CURRENT
•
A27-IOA
.........- ......._._.....-
®
•
A26-88
5 VlCM
SUMMING AMPL
"
A28, TP-B
SEE INSERT
®
""'1"'.
~~lllil rmI'lTr
"j.t-.....:.
J
i< 128
J
8W6A
o
>
Figure 3-6.
(---')
/
Forward Seek Waveforms
"\
')
Because the subsystem is a closed loop servo,
all of the signals are interacting. Therefore, misadjustments may cause seek difficuI ties that appear. to be hardware malfunctions.
Check all adjustments before initiating
detailed trouble analysis procedures. All
adjustments should be checked if any servo
loop cards have been replaced. All adjustments must be made on a thermally stable unit
with all panels and covers installed. For
thermal stabilization, perform 15 minutes of
256-track repeat seeks.
.11
I-
+
I-
+
V
"~'1V ~.
I-
(.1 V/CM)
1+
A
IIIV
"'IV' ..
t- ~B+
-I-
+
I:-
+-
-+-
-t-
t-
aW7
Velocity Gain Adjustment
This procedure adjusts the gain of the velocity signal applied to the summing amplifier.
The concept of this procedure is to
adjust for track following capabilities.
1.
Make sure all panels are installed
and all covers closed.
2.
Start spindle and allow heads to
load.
Figure 3-7.
first overshot (point "D") must be
between 2 and 3 cm (200 to 300 mv)
above the center graduation on the
scope.
If scope trace is too high
or too low, readjust velocity gain
pot so that both positive (point "D",
Figure 3-8) and negative (point "B",
Figure 3-7) overshoots have at least
an 80% occurrance within 200 to 300
mv.
NOTE
Perform 15 minutes of 256-track
repeat seeks for thermal stabilization.
c'
3.
Enable square wave generator by
connecting a wire from A26-0lA to
A26-l6B.
Velocity Gain Wavefonn (Preliminary)
9.
When adjustment is complete, remove
wire used to enable square wave
generator.
10.
Perform Coarse Position Gain Adjustment immediately.
NOTE
No FTU is required for this adjustment since all work is done at
cylinder 00.
4.
Sync scope on positive edge of A26,
TP-Y (square wave generator).
5.
Connect scope vertical to A26,TP-D
(Fine Position, A2609). Set horizontal sweep to 5 ms/cm.
6.
7.
8.
83313100
Adjust vertical position knob on
scope to move trace up until area
"A" in Figure 3-7 is centered on
middle graduation on scope.
Adjust velocity gain pot (middle
pot) on A27 until first overshoot
(point "B" on Figure 3-7) is between 2 and 3 cm (200 to 300 mv)
below center graduation on scope.
Adjust vertical position knob on
scope to move scope trace down until
area "C" (Figure 3-8) is centered
on middle graduation on scope. The
A
Coarse Positions Gain Adjustment
1.
Command a 256-track continuous seek.
Each seek must be followed by a R/W
function of at least one track.
-+-
-+-
-+-
I
-t-
OJ-
-'
I
-
I
(.I V/CM)-
----- ----- ----- ----- --- -- ----~ ------ -----1----c --
~--~~--~--~--_+--_+--fl+--_+--
1../\
h. A
t\ 11
'IV' V "I"·V
-
-\-
-I-
t-
F-
-I-
t-
-I-
-I-
-
awa
Figure 3-8.
Velocity G3.in Wavefonn (Final)
3-15
NOTE
If smoothness checks causes faults,
perform integration adjustment first,
or ground A13-l4B until the coarse
gain and integrator are both
adjusted.
2.
Sync negative on A27-l2A.
3.
Connect oscilloscope to A26,TP-D
and A27,TP-E.
4.
Set Horizontal sweep to 10 ms/cm
magnified by 5.
5.
Adjust coarse position gain (top po~
on A27 so that point A (Figure 3-9)
lies between the 14th and 15th negative pulses. Allow the drive to
access at this adjustment for 1
minute to allow temperature stabilization. Readjust if necessary.
3.
Connect oscilloscope to A27,TP-C
(observe both positive and negative
wave shapes).
4.
Set horizontal sweep to 15 ms/cm
magnified by 5.
5.
Check continuity at point marked on
Figure 3-10 for less than 30 mv. (If
Coarse position Gain Adjustment was
performed previously it is not
necessary to repeat the test.)
6.
Adjust integrator gain pot (bottom
pot) on A27 until discontinuity at
the point marked on Figure 3-10) is'
at a minimum. This minimum must be
less than 30 mv.
7.
Proceed to Coarse Position Gain
Adjustment procedure.
Servo Margin Test
6.
Proceed to Integrator Gain Adjustment and then return to this adjustment. Repeat until both adjustments
meet their respective limits.
This procedure is intended to be a troubleshooting aid and not an adjustment procedure.
Perform this test after adjusting the veloci ty gain, coarse position gain, and integrator
gain.
Integrator Gain Check and Adjustment
This procedure must always be done in conjunction with the Coarse position Gain
Adjustment.
I
1.
1.
Adjust coarse position gain (top pot
on A27) so that point A (Figure 3-9)
lies on 7th pulse.
2.
Perform five minutes of random access
seeks (no read/write function).
No
access errors should occur.
3.
Access errors indicate:
Command l28-track continuous seeks
between cylinder 000 and 128.
2. . Sync negative on A27-llA.
n n
4.
1\
-~
II
I~
A~
Figure 3-9.
3-16
\j
ETC
4
u
:3
~
~
2
~
C
V
I
Coarse Position Gain Wavefonn
a.
Velocity gain misadjusted.
b.
Velocity transducer defective.
(Excessive velocity drift causes
point A on Figure 3-9 to drift
to first pulse.)
c.
Defective servo cards (MRV or MSV) •
d.
Defective servo head.
Readjust coarse position gain (top
pot on A27) so that point A (Figure
3-9) lies between 14th and 15th
negative pulses.
On Cylinder Delay Check
8Y6
This procedure is intended as a useful
troubleshooting aid and is not an adjustment.
1.
Command a one-track continuous seek.
2.
Connect oscilloscope to A28,TP-B
and A28-8B.
83313100 C
, ,.. "
- r-.- r--.... -....
~,
~
N.
............
""~
r-
-
(,
~ -1
2V/CM
O.2V/CM
:::::z:
J
~
.--- V
~
A21, TP-C
~~
/0
:....I
aRIa
Figure 3-10.
3.
4.
Velocity Integrator Waveforms
observed wavefonn should oot exceed the
Sync positive on A28,TP-B and
measure time A28,TP-B is a logical 1
(4.75 ±0.5 ms).
Sync positive on A28,TP-B and
measure time A28-8B is a logical 0
(7 • 0 ±1 • 0 ms).
Fine Position Tost
requirements of Figure 3-11. If
value exceeds requirements, go to
step 8. If value is within requirements, go to step 6.
6.
Remove pack, rotate pack 90 degrees
and install pack.
7•
·Observe waveform on scope. The
average peak-to-peak value should
not exceed requirements of Figure
3-11. If value exceeds r~~ts,
go to step 11. If within requirements, go to step 8.
8.
Observe waveform on scope to determine where Fine position signal
synch~onizes with Index.
9.
Remove pack, rotate pack 90 degrees
and install pack.
NOTE
,.._.....
L'
Runout is the degree to which a
rotating object rotates off center.
Too much runout causes the object
to wobble or vibrate.
This test checks the track following capability of the drive and runout of the~e.
Runout of the pack and spindle are additive,
therefore a pack with known characteristics
must be used (preferably a CE pack).
1.
Load heads.
2.
Sync positive on Index Bll-12B (X340l).
3.
connect oscilloscope to A26-TPD(Fine
position Signal). Set sweep rate to
2 ms/div.
4.
Perform direct seek to cylinder 200.
- - - - - -- - - - - - - - - - - - - - - -
- - - - - - -
+ISOMV
o
NOTE
The signal measured in step 4 is the
60 Hz component of the displayed
waveform. The waveform in Figure
3-11 is typical and.may vary from
drive to drive.
5.
Observe waveform on scope. The
average peak-to-peak value of the
-ISOW
8Y39
Figure 3-11. Fine Position Gain wavefoll1l
~---\
C
'I
I
83313100
A
3-17
NOTE
The point at which Index and the
Fine Position signal synchronizes
may be different from pack to pack.
However, the sync point must be the
same for the pack under test, no
matter how many times the pack is
removed, rotated, and installed on
the spindle.
10.
11.
12.
watching the meter. paS/NEG m.eter
readings will converge as zero error
is approached.
9.
Observe waveform on scope to determine where Fine Position signal
synchronizes with Index.
If sync
point coincides with sync point
determined in step 8, go to step 11.
If not, go to step 12.
Check wave'form amplitude requiranents
of Figure 3-11. If observed waveform exceeds limits, the problem is
too much pack runout.
Replace pack
with a known good pack and repeat
this procedure. If waveform is now
within limits, test is complete.
Repeat steps 6 through 8 to calculate
P-N value for cylinder 490,491,8 and
800. The drive will meet the follo~
ing requirements.
a.
P-N reading at track 490 (20
mv max.).
b.
Pr-N reading at track 491 (20
mv max.).
c.
P-N reading at track 8 (20 mv nax.).
d.
P-N reading at track 800 (20
mv max.) •
e.
Even/Odd track error at track
490/491 (20 mv max.) •
EXAMPLE:
If unable to get waveform to synchro- •
nize on Index at same position of
waveform by rotating pack, problem
is a defective spindle or servo head.
Replace servo head or spindle and
retest.
491
490
or
Fine Position Offset Chock and Adjustment:
1.
Connect FTU to drive.
2.
Mount CE pack pIN 70430001 in drive.
3.
Press WRITE DISABLE switch.
4.
Press (to light) START switch.
NOTE
Perform 15 minutes of 256-track
repeat seeks for thermal stabilization.
5.
Command a direct seek (access only)
to cylinder 8.
Set Read/Write-Servo
switch on FTU to Servo position. Set
P-N switch on FTU first to P position
(note meter reading) then to N position (note meter reading). Subtract
N from P algebraically.
Add reading at 490 to
reading at 491 if directions are unlike to obtain
step e value.
lOR
15F
25mv
Subtract reading at 490
from reading at 491 if
directions are like to
obtain step e value.
491
490
40F
25F
ISITI'J
10.
Perform the following adjus'l::rrents at cylinder 490 only if the requirements in
step 9 were not met.
a.
Seek to cylinder 490. Calculate
P-N readings and record error
and direction of error. ,
b.
Seek to cylinder 491. Calculate
P-N readings and record error
and direction of error.
c.
Adjust bottom pot on A26 so that
error (calculated in a and b) on
tracks 490 and 491 are of equal
amplitude and opposite direction.
d.
Adjust top pot on A26 so that
error in step c on tracks 490
and 491 is less than 2 mv.
6.
Record meter reading with the Pa3,1NEX;
switch in the P position.
7.
Record meter reading with the Pa3jNEX;
switch in the N position.
Seek Timing Checks
Calculate (P-N) value. Determine
and note the direction of error by
pushing lightly on the carriage while
The seek timing checks verify correct overall loop operations. These tests are not
necessarily requirements. Failure to pass
8.
3-18
83313100
A
any of these tests, however, indicate J;X>tential
degraded performance that may cause difficulties ~t a later time.
4.
Command one-track forward seeks.
5.
Waveform must be "1" for 20 (±5) ms.
6.
Command RTZS to clear error.
Long Seek Test
1.
Connect oscilloscope to A28-8A
(On Cy11nder, I3l08).
2.
Sync positive internal.
3.
Command continuous 823-track seeks.
4.
Waveform must be "1" for 55 ms maximum.
~elocity
1.
Connect channel A of oscilloscope to
A27,TP-F (Velocity Feedback,A280l).
Connect channel B to A27,TP-D
(Velocity Integrator, A2803).
2.
Sync neaative external on A22-7B
(Forwar ).
3.
Command a one-track repeat seek between tracks 000 and 001.
4.
Note approximate location of integrator peak with respect to position
of ve'locity peak.
5.
Repeat test between tracks 821 and
C22.Timing relationship of step 4
should be approximately the same as
step 5.
One Track Seek Test
"
C
1.
Connect oscilloscope to A28-8A
(On cylinder, I3l08).
2.
Sync positive internal.
3.
Command continuous one-track seeks.
4.
Observe waveform through at least
80 tracks of seek. Waveform from
start of seek (starting at "1")
until it goes to "0" must be 6 to
10 ms.
Return to Zero Seek from Cylinder 000
I
1.
Connect oscilloscope to A28-8A
(On Cylinder, I3l08).
2.
Sync positive internal.
3.
Command direct seek to cylinder 000.
4.
Command RTZ. Waveform must be "1"
for 15 (±5) ms.
Transducer Linearity Test
Track Servo Logic Checks
These tests check the logic associated with
the track servo. The tests ~re applicable
only if the adjustments could not be made or
if troubleshooting a malfunctioning drive.
Track Servo Amplitude Check
This test checks the amplitude of the track
servo signal output of the servo preamp.
1.
Disconnect voice coil yellow leadwire.
.
2.
Manually load heads with pack up to
speed.
3.
Connect oscilloscope channel A
vertical input to B2l-3B; channel B
to B2l-5B. (Track Servo preamp output. )
Return to Zero Seek from Cylinder 822
1.
Connect oscilloscope' to A28-8A
(On Cylinder, I3l08).
2.
Sync positive internal.
3.
Command direct seek to cylinder 822.
4.
Invert channel A and add algebraically. Sync internal.
4.
Command RTZ. Waveform must be "1"
for 300 (±50) ms.
5.
Move carriage and monitor maximum
signal points (between tracks) •
6.
Peak-to peak amplitude of waveform
must be 2.0 (±l.O) volts.
Seek Into Forward EaT
1.
Connect oscilloscope to A28-8A
(On Cy11nder, I3l08).
2.
Sync positive internal.
3.
Command direct seek to cylinder 822.
83313100
A
AGC Amplifier Check
This test verifies that AGC amplifier and
the AGC voltage are working correctly.
3-19
l~.
1.
Disconnect voice coil yellow
2.'
Manually load heads with pack up to
speed.
3.
Extend A21.
4.
Connect oscilloscope channel A
vertical input to A21,TP-Ti channel
B to A21,TP-U.
5.
Invert channel A and add algebraically. Sync internal.
6.
Observe waveform similar to Figure
3-12. Move carriage to position
near cylinder 000 so that horns (one
set positive, other set negative)
are of equal amplitude. Carriage
is now on cylinder. Peak-to-peak
voltage must be 1.0 (±0.2S) volt.
5.
Connect oscilloscope vertical input
to A26,TP-B (Track Servo Signal).
6.
Sync negative on A21-SB (Cylinder
Detect A) •
NOTE
The following steps may be accomplished by moving positioner manually
with voice coil yellow leadwire disconnected or by commanding 3-track
continuous seeks.
7.
Check that servo signal is +0.4
(±O.l) volt at beginning of sweep.
S.
Sync positive. Check that servo
signal is 0 (±O.l) volt at beginning
of sweep.
9.
Sync positive on A21-7B (Cylinder
Detect B, A3002). Check that servo
signal is 0 (±O.l) volt at beginning
of sweep.
Cylinder Pulse switching Level'Check
It is not necessary to perform the remainder
of the procedure if the requirements of steps'
1 through 4 are met.
1.
Sync external negative on A22-7B
(Forward) •
2.
Connect oscilloscope vertical input
to A23-2A (Cylinder Pulses,I3007).
3.
Command continuous 4-track seeks.
Check for series of positive-going
10 ~sec cylinder pulses. (Depending
on system alignment, last pulse may
be 1.2 l1sec.)
4.
Command continuous seeks of varying
lengths. Verify that pulses are
consistently generated during long
seek lengths.
(Track servo signal
amplitude decreases with increasing
velocity.)
Proceed to step 5 if requirements of steps 3 or 4 are not
met.
~
ft n
\)
(
V~
n
U
~ V
IV, ~
A ~
I
r 'I11
V
V
A
~'I
V~
10.
Sync negative. Check that servo
signal is -0.4 (±O.l) volt at
beginning of sweep.
11.
If requirement of steps 7 through
10 are met, extend A23 and check
delay X3001.
On Cylinder Switching Level Check
This procedure verifies that On Cylinder is
enabled when the fine position signal approaches nUll, with the Fine FF set.
1.
Disconnect yellow leadwire from
voice coil.
2.
Manually load heads with pack up to
speed.
3.
Connect oscilloscope to A26,TP-D
(Fine Position, A2601).
4.
Sync positive on A28,TP-B (On
Cyl~nder Enable) •
5.
Calibrate scope to ground.
6.
Slowly move carriage manually (take
care not to enter either EaT area
as this disables the level detection). Two erratic horizontal waveforms will be displayed. Check that
waveforms at beginning of track are
+0.70 (±O.OS) volt and -0.70 (±O.OS)
volt.
7.
Sync negative and recalibrate trace
to ground.
l(tO.25)V
~
aWl!
Figure 3-12.
Track Servo Amplitude
:~\,
c
3-20
83313100
A
8.
Slowly move carriage manually (take
.care not to enter either EOT area as
this disables the level detection).
Check that horizontal waveforms at
beginning of sweep are +0.30 (±O.OS)
and -0.30 (±O.OS) volt.
Velocity Transducer Gain Uniformity'
1.
Command 822-track continuous seeks.
2.
Sync positive on B23-5B (T<128,I2437).
3.
Connect oscilloscope vertical input
to A27,TP-O (Integrated Velocity,
A2803) •
4.
Observe waveform similar to Figure
3-14. Adjust triggering controls to
observe both negative and positive
ramps. Ramps represent integrated
velocity sawtooth during last 127
tracks of seek. Positive ramps are
forward seek; negative ramps are
reverse seek.
5.
Check voltages of next to last position and negative ramps. Their
amplitudes must be 2.0 (±0.2) volts.
Also, these voltages shall be equal
(the difference of their absolute
values) within 0.3 volt. If not:
Velocity Logic Checks
These tests check the logic associated with
the desired velocity logic. The tests are
applicable only if the adjustment could not
be made or if troubleshooting a malfunctioning drive.
position converter Output Check
The position Converter Output should be
clamped until T<128. The remaining tracks
of the seek are under control of the O/A
converter.
1.
Command continuous 192-track seeks.
2.
Connect channel A to A27,TP-B (O/A
Converter output, A2702).
3.
Sync negative on A22-7B (Forward,
11911). Set sweep time to 1 ms/cm.
4.
Observe waveforms similar to
Figure 3-13.
Fine Enable Switching Level
At T=128 OA output is 10 volts. It
then steps down with each track to
control converter output.
This procedure verifies that fine enable
switches in at the proper level. This signal, along with T
~FRONT SCREW
8R6
Figure 3-19.
3-26
~
Lower Rail Adjustment Eccentrics
83313100
A
49.
Install deck top cover.
the casting far enough to fully compress the spring. Notice that because of the rounded edges of the
casting, the sleeve may appear to be
below the casting surface when i t is
correctly adjusted. Special attention is required to ensure that the
sleeve is flush with the lowest point
of the curved surface around the
spring cavity.
50. Close cabinet top cover.
I
BRAKE BELT (V-BELT)
SIC 10 WITHOUT PE39280 AND BELOW
Adjustment;
The brake belt adjustment procedure consists
of gaining access to (and a clear view of)
the adjustment screw and nut; making proper
adjustment; and carefully checking for tension, travel, and freedom of movement.
6.
Check that the brake mounting plate
is free to move on its mounting
hardware. Grasp the brake mounting
plate and apply a back and forth
motion while watching for motion between the brake mounting plate and
its mounting hardware.
If the plate
is not free, loosen one or more
screws, as necessary, to relieve the
binding.
7.
To check that the brake belt adjustment tension spring has not been
fully compressed, grasp the ~ halves
of the brake belt and squeeze them
toward one another (refer to Figure
3-20), while watching.for movement
(1/16 to 1/8 inch) of the brake
plate toward the spindle motor.
If
there is no noticeable motion it is
probably because the adjustment
spring has been fully compressed
(assuming step 6 has been successfully completed). Back out the
adjustment screw (turn screw counterclockwise) enough to get 1/32 inch of
brake plate movement. Recheck steps
,5, 6, and 7.
8.
Replace the pulley cover/logic hose
shield, close the door, and turn
UNIT POWER circuit breaker to ON.
NOTE
The brake belt adjustment procedure
is critical to satisfactory brake
·performance. A minor misadjustment
can result in marginal braki.i1g action
and early brake belt failure. To
ensure proper adjustment, a visual
.inspection must be made.
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Open cabinet rear door.
NOTE
It is possible to complete this adjustment procedure without turning
the pulley cover/logic hose shield;
however, the adjustment nut can be
seen more conveniently with the
cover shield out of the way.
3.
On units having a brake pulley cover/
logic hose shield, remove the left
screw and loosen the screw on the
right.
Swing the cover/shield down
and out of the way.
4.
Visually inspect the brake belt for;
frayed edges, glazed or worn spots
or deformed cross section, or cracks
(especially on inner side of V-belt.
Replacement
If any of these signs of wear are
present, replace the belt according
to the Brake Belt Replacement procedure.
5.
With the aid of a mirror, locate the
sleeve on the end of the brake belt
adjustment screw (refer to Figure
3-19). Position the sleeve (by turning the adjustment screw) so that
the back side of the sleeve is flush
with the surface of the motor mount
casting at the lowest point. The
sleeve should neither protrude outside the spring cavity in the casting, nor should it be driven into
83313100
C
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Remove disk pack.
3.
Remove drive belt (flat belt) from
spindle motor pulley by moving
spindle motor forward and raising
belt clear of drive pulley. Allow
bel t to remain around spindle P!llley.
4.
Turn brake belt adjustment screw
(Figure 3-20) counterclockwise to
relieve tension on brake belt.
Remove belt from hysteresis brake
pulley.
5.
Remove brake belt from drive motor
pulley.
3-27
FOR BELT ADJUSTMENT
TIGHTEN SCREW SO SLEEVE
IS FLUSH WITH HOUSING.
"
.
""
BRAKE BELT
. ADJUSTMENT
SCREW
\ ......
MOTOR
MOUNT
CASTING
SQUEEZE BRAKE BELT. CHECK FOR
FREEDOM OF MOVEMENT BETWEEN
MOTOR MOUNT CASTING AND
BRAKE MOUNTING PLATE.
SPINDLE
MOTOR
8S152
Figure 3-20.
Brake Belt Adjustment
('
'-...
3-28
83313100
A
6.
7.
Install replacement belt on drive
motor pulley and loop other end over
hysteresis brake pulley.
Perform Brake Belt Adjustment procedure.
Adiustment
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Remove disk pack.
3.
Rotate spindle to a position where
the brake tooth is not under a notch
in the pack mounting plate (Figure
3-21).
4.
Check distance between brake tooth
and pack mounting plate with a
feeler gauge. Distance should be
0.010 (±0.002) inch. If necessary,
adjust as follows:
BRAKE PAWL ASSEMBLY
Check
1.
With parking brake cover (Figure
3-21) in place, check that 'clearance
between brake tooth and flat surface
on underside of pack mounting plate
is 0.005-0.020 inch.
2.
Check that distance between spindle
centerline and brake actuator button
is 7.112 (±0.005) inches.
Figure 3-21.
83313100
A
a.
Remove brake access cover.
Brake Plate Replacement
3-29
b.
5.
Adjust set screw counterclockwise to increase distance or
clockwise to decrease distance.
CAUTION
The
the
ing
not
Install disk pack.
Replacement
1.
Stop drive motor.
2.
Remove disk pack.
open.
3.
Remove five screws securing parking
brake cover to shroud.
Leave pack cover
4.
Remove two screws securing brake
plate assembly and springs to deck
casting.
5.
Install replacement brake plate assembly to deck casting with two
screws and springs (Figure 3-21).
6.
Perform Brake Pawl Assembly Adjustment procedure.
7.
Install disk pack and close pack
cover.
8.
Check that clearance between ring
and arm tools is as specified in
Figure 3-22.
9.
Loosen three bolts securing the
spindle assembly to deck.
NOTE
On units having cutouts in shroud
(see Figure 3-22) proceed to step
10. On units not having cutouts,
proceed to step 11.
10.
Using spindle adjustment tool,move
the spindle to obtain the clearance
specified in Figure 3-22. If this
clearance is obtained proceed to
step 12. However, if it is too far
out of adjustment to be corrected
in this manner, proceed to step 13.
11.
Using a plastic face hammer, lightly
tap spindle housing (beneath deck)
to move spindle assembly. If requirements of Figure 3-22 are met,
proceed to step 12. However, if it
is too'far out of adjustment, proceed to step 13.
12.
Tighten the three spindle screws and
recheck clearance. If incorrect,
repeat steps 10 or 11 (as applicable) ~ When the clearance is correct,
proceed to step 20.
13.
Move the spindle until the dowel pins
are centered in the spindle slots.
CARRIAGE ASSEMBLY
Carriage/Spindle Alignment
The carriage assembly is properly aligned
when carriage motion is along a radial line
from the axis of rotation of the spindle assembly. The following adjustment is required
whenever the five screws securing the-actuator housing to the deck casting are loosene~
or if the spindle assembly is loosened from
the deck casting.
carriage is aligned by moving
spindle. The five bolts securthe actuator to the deck are
to be loosened.
1.
Set UNIT POWER circuit breaker to
OFF.
14.
Loosen the three screws securing the
actuator housing to the deck.
2.
Refer to Head/Arm Replacement procedure and remove head number 10.
15.
Loosen the three screws securing the
magnet to the deck.
3.
Install carriage alignment arm on
carriage at head 10 position.
4.
Torque head/arm clamp screw, clamp
plate, washers, and alignment arm
to 4 inch-pounds.
5.
Install head cam tool.
6.
Install carriage alignment ring on
spindle.
7.
Slowly extend carri';lge until carriage
alignment arm and r1ng are approximately aligned as shown in Figure
NOTE
The-actuator housing pivots on a pin
located in its base and just forward
of the magnet assembly. Pivoting
motion is tangential to spindle.
16.
Rotate the actuator to obtain the
clearance specified in Figure 3-22.
17.
Torque (using 55 to 60 inch-pounds)
the three screws securing the actuator housing.
3-22.
c
3-30
83313100
A
\
MAGNET
ASSEMBLY
ACTUATOR
ASSEMBLY
~
.
CARRIAGE
ALIGNMENT
RING
CARRIAGE
ALIGNMENT
TOOL
FEELER GAGES INSERTED
HERE (ADJUSTMENT CORRECT
WHEN GO GAGE FITS SNUG)
85156
c~:
Figure 3-22.
83313100
A
Carriage Alignment
3-31
18.
Tighten the three screws securing
the magnet.
11.
Fully retract carriage and hold
securely in place.
19.
Recheck the clearance and fine adjust
as instructed in step 10 or 11 (as
applicable).
12.
20.
Retract carriage. Remove head cam
tool and carriage alignment arm.
Using a plastic feeler gage,measure
gap "B" shown in Figure 3-17. If
requirements are not met, perform
Carriage Retracted stop Adjustment
procedure.
13.
21.
Remove carriage alignment ring.
Remove carriage alignment tool from
spindle.
22.
Refer to Head/Arm Replacement procedure and install head removed in
step 2.
14.
Remove head cam tool.
15.
Remove actuator stop inspection tool.
23.
Perform Head/Arm Adjustment procedure.
16.
Refer to Head/Arm Installation procedure and install head removed in
step 5.
24.
Inspect read/write heads according
to procedures in Preventive Maintenance section, clean heads if
necessary.
17.
Perform Head/Arm Alignment procedure
on head removed and heads above and
below it.
Stop Ch~ck
Carriage Extend Stop Adjustment
1.
Stop drive motor.
2.
Remove disk pack.
3.
Open cabinet top and pack cover.
4.
Remove deck top cover.
5.
Refer to Head/Arm Replacement procedure and remove head 7.
6.
1.
Perform steps 1 through 8 of Stop
Check procedure.
2.
Refer to Actuator Replacement procedure and remove magnet assembly.
I,
Each stop rod shim is 0.015 inch
thick. Determine the quantity of
shims to be added or removed before
removing stop rods.
3.
When installing actuator stop inspection tool, hold tool tight
against back carriage stop until
secured in place (Figure 3-17).
Install actuator forward inspection
tool on carriage in head position 7.
Secure tool with head clamping
hardware.
9.
10.
3-32
Using a screwdriver, remove each
stop rod (Figure 3-17).
NOTE
Remove or replace an equal number
of shims on each stop rod.
4.
5.
8.
~
NOTE
Install carriage alignment ring on
spindle assembly.
NOTE
7.
.~.
Add or remove stop rod shims as
required for each stop rod.
Apply one drop of Loctite, Grade C,
.to the threads of each stop rod.
Install head cam tool (refer to
Manually Positioning Carriage procedure).
6.
Install stop rods and tighten in
place.
Fully extend carriage and hold
securely in place.
7.
Refer to Actuator Replacement pro~
cedure and install magnet assembly.
8.
Perform Carriage/Spindle Alignment
procedure.
9.
Perform Stop Check procedure.
Using plastic feeler gage, measure
gap "A" shown in Figure 3-17. If
requirements are not met, perform
Carriage Extended stop Adjustment
procedure.
83313100
A
~.
Carriage Retracted Stop Adjustment
1.
FIRST SEEK INTERLOCK ASSEMBLY
Perform steps 1 through 8 of stop
Check procedure.
NOTE
Each stop shim is .010 inch thick.
Determine the quantity of shims to
be added or removed before removing
screws that secure carriage shim.
2.
Remove two screws securing· carriage
shim (Figure 3-17) •
3.
Add or remove stop shims as
4.
Apply one drop of Loctite, Grade C,
to the threads of each screw used
to secure carriage shim.
5.
Install two screws through carriage
shim and stop shims into carriage.
Tighten screws.
~.
The timing motor cam and the interlock switch
are the only adjustable part of the first
seek interlock assembly. Cam adjustment is
performed during motor replacement and sOOuld
not require further adjustment. Adjust the
interlock switch as required.
Check
This procedure verifies correct operation of
the first seek interlock assembly. Use a
stopwatch or wristwatch with sweep second
hand. With a pack installed and all cov~rs
closed, proceed as follows:
1.
Set the LOCAL/REMOTE switch to
LOCAL.
2.
Set UNIT POWER circuit breaker to
3.
While observing Physical Unit Identification indicator, press START
switch and start timer. Indicator
should light after about 15 seconds.
If longer than about 17 seconds,
check the following:
6 •. Perform Stop Check procedure.
COIL ASSEMBLY REPLACEMENT
1.
Refer to Actuator Replacement procedure and follow instructions to
remove magnet assembly.
2.
Remove insulated screws that secure
flexible conductor assembly to
actuator housing and to carriage.
3.
Remove three screws securing coil
assembly to carriage. Remove coil
and flexible conductor asseffibly from
unit.
4.
Remove flexible conductor connection
from coil lead and attach to the
same lead on replacement coil.
5.
Install replacement coil and flexible
conductor assembly in unit and
secure it to carriage with three
screws.
6.
Replace insulated screws removed in
step 2 ensuring that backing plate
and coil lead wires are installed
correctly.
7.
Refer to Actuator Replacement procedure and install and align magnet
assembly. Follow all remaining
·steps in actuator replacement procedure.
•
Timing motor cam adjustment
•
Interlock switch adjustment
•
Logic card at location A12
O~
Auembly Replacement
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Open pack cover.
3.
Remove disk pack.
4.
Open top cover.
5.
Disconnect timing motor cable plug
(Figure 3-23).
6.
Identify and disconnect interlock
switch leadwires.
7.
Remove two screws and washers securing interlock assembly to deck
(Figure 3-23).
8.
Slide assembly away from Spindle while
IW-ling assembly upwcu:ds through opening
in shroud. Remove assembly from
drive.
o
83313100
A
3-33
SIDE COVER
MOTOR CONNECTOR
)
Figure 3-23.
9.
First Seek Interlock Assembly
Connect timing motor cable plug to
replacement interlock assembly.
10.
Connect interlock switch leadwires.
11.
Install replacement interlock assembly on deck. Secure assembly to
deck using two screws and washers.
12.
3-34
Perform steps 1 through 8 of First
Seek Interlock Assembly procedure
then go to next step.
2.
Loosen two setscrews securing cam to
motor shaft.
3.
Remove two screws, washers, and nuts
securing the timing motor (and 4-lug
terminal strip) to the mounting
bracket (F.igure 3-24). Remove motor
and terminal strip.
4.
5.
Install replacement timing motor and
terminal strip on mounting bracket
as shown in Figure '3-24. Secure
motor and terminal strip using two
screws, washers, and nuts.
Install cam on motor shaft as shown
in Figure 3-24. Adjust cam on shaft
to get maximum contact with switch
actuator arm. Tighten setscrews in
cam.
NOTE
Bend capacitor leads midway between
solder joint and where lead goes
into capacitor body.
Perform First Seek Interlock Check
procedure.
Motor Replacement
1.
(------,
6.
Using a needlenose pliers, bend
capacitor leads on terminal strip as
shown in Figure 3-24.
7.
Perform steps 9 through 12 of First
Seek Interlock Assembly Replacement
procedure.
Switch Adjustment
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Open cabinet top cover.
3.
Using a number 4 nutdriver, loosen
the two nuts securing switch mounting bracket (Figure 3-24) to assembly bracket.
83313100
A
ASSEMBLY MOUNTING BRACKET
INTERLOCK SWITCH
NUT, FLAT WASHER AND
LOCKWASHER
SWITCH MOUNTING SCREWS
8S114
Figure 3-24.
4.
5.
Timing Motor/Switch Replacement
Adjust switch mounting bracket so
the switch activates when the timing
motor cam is tangent with the switch
actuator arm (Figure 3-24). Tighten
the left nut (nut that is on adjustment slot in bracket) first, then
tighten right nut.
Perform Interlock Switch Check procedure.
5.
position replacement switch onmritch
mounting bracket as shown in Figure
3-24.
Secure switch using two screws
and washers.
6.
Perform Switch Adjustment procedure.
DRIVE BELT
Adjustment-
Switch Replacement
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Open top cover.
3.
Identify and mark leadwires to interlock switch.
Disconnect leadwire at
switch terminals.
4.
Remove two screws and washers securing switch to switch mounting bracket.
Remove switch.
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Open cabinet front panel.
NOTE
While inspecting drive belt,also inspect
brake belt. If required, replace brake
belt per Brake Belt Replacement procedure.
3.
Inspect drive belt for cracks or
worn spots. If required,replace belt
per Drive Belt Replacement procedure.
G
83313100
A
3-35
4.
Open cabinet rear door.
5.
Locate drive belt tension idler
springs (Figure 3-25). Check both
springs for correct adjustment as
explained in step 6.
6.
Length between idler spring posts
must be 5.42 (±.12) inch. If adjusbment is required, proceed to step 7,
if not,proceed to step 9.
7.
Loosen two screws securing idler
spring adjustment bracket to deck.
8.
Reposition idler spring bracket and
spring until requirements are met.
Tighten screws and recheck requirements.
9.
Close cabinet rear door.
10.
(~
Close cabinet front panel.
Replacement
1.
Set UNIT POWER circuit breaker to OFF.
2.
Remove disk pack.
3.
Disconnect speed sensor plug P3.
4.
Remove static ground spring leadwire
from deck casting.
5.
Make note of pack sensor switch lea~
wire connection scheme and disconnect
leadwires at switch.
Figure 3-25.
Drive Belt Adjustment
DRIVE MOTOR REPLACEMENT
SIC 10 WITH PE39280B AND ABOVE
1. Stop spindle motor.
NOTE
Use care when removing drive belt
not to damage pack sensor switch
or static ground spring.
6.
Remove idler springs.
7.
Move drive motor toward spindle assembly and remove drive belt from
drive motor pulley, then from spindle pulley. Remove belt from unit.
8.
Install replacement belt around
spindle pulley.
9.
Move drive motor toward spindle assembly and slip drive belt around
drive motor pulley.
10.
Reconnect speed sensor plug P3,pack
sensor switch leadwires and static
ground spring leadwires.
11.
Perform Drive Belt Adjustment procedure.
3-36
2. Remove disk pack.
3. Set UNIT POWER circuit breaker to OFF.
4. Remove idler springs.
5. Move drive motor towards spindle assanbly
and slip drive belt off drive m:::>tor pllley.
.6. Disconnect drive motor cable plug-P7.
7. Disconnect hysteresis brake cable plug
P2, speed sensor plug-P3, and pack on
switch connector.
CAUTION
Do not support motor and brake assembly
on hysteresis brake cup.
8. Support drive motor and brake assembly
from below and remove four screws holding drive motor to motor mount. Note
that there are two long and two short
screws. (Refer to Figure 3-25.1)
83313100
C
SHOCK MOUNT
DRIVE BELT
CABLES (NOT SHOWN)
P2-HYSTERESIS BRAKE
P3-SPEED SENSOR
P7 - DRIVE MOTOR
8Y46
Figure 3-25.1. Drive Motor Replacement
SiC 11 and Above With PE39280B
(
.1
'--../
9.
Loosen both setscrews in drive motor
pulley.
Remove pulley.
10.
Remove hyste·resis brake assembly as
described in Hysteresis Brake Replacement procedure.
11.
12.
13.
14.
Install hysteresis brake assembly on
replacement drive motor as described
in Hysteresis Brake Replacement procedure.
Slide drive motor pulley on replacement drive motor shaft until it is
0.56 (±0.02) inch from drive motor
end bell. Tighten both set screws.
Support replacement drive motor from
'below and install on motor mount
casting (orient air exhaust openings
towards air supply). Secure drive
motor to motor mount casting using
two long and two short screws in their
respective locations.
Position drive belt around spindle
pulley, and slip other end of belt
around drive motor pulley. Visually
confirm that drive motor pulley is
alligned with spindle pulley.
15.
Replace idler springs.
16.
Connect drive motor cable plug-P7.
17.
Connect hysteresis brake cable plugP2.
83313100
C
18.
Set UNIT POWER circuit breaker to ON.
19.
Install a scratch pack.
20.
Start spindle motor.
Observe drive
motor for proper operation.
21.
Stop drive motor.
22.
Remove disk pack.
DRIVE MOTOR REPLACEMENT
SIC 10 WITHOUT PE39280B AND BELOW
1.
Stop drive motor.
2.
Remove disk pack.
3.
Set UNIT POWER circuit breaker to OFF.
4.
Remove idler springs.
5.
Move drive motor towards spindle assembly and slip drive belt off drive
motor pulley.
6.
Disconnect drive motor cable plug P7.
7.
Disconnect hysteresis brake cable plug
P2.
8.
Support drive motor from below and remove four screws (note how washers and
bushing comes off each screw) and
washers securing motor mount casting
to shock mounts. Remove drive motor
and motor mount casting from drive.
3-36.1/3-36.2
('"
9.
Turn hysteresis brake adjustment
screw counterclockwise to relieve
tension on brake belt. Slip brake
belt off hysteresis brake pulley and
then off drive motor pulley.
10.
Remove four screws securing drive
motor to motor mount casting. Remove
drive motor.
11.
Loosen both setscrews in drive motor
pulley. Remove pulley.
\
12.
13.
Slide drive motor pulley on replacement drive motor shaft until it contacts pulley adjustment tool. Tighten
both setscrews.
14.
Install replacement drive motor on
motor mount casting (orient air exhaust openings towards hysteresis
brake). Secure drive motor to motor
mount casting with four screws.
15.
Slip brake belt around drive motor
pulley (make sure belt is seated
properly on pulley). Slip other end
of belt around hysteresis brake
pulley.
Position pulley adjustment tool on
motor as shown in Figure 3-26.
MOTOR
0.56 0.02
INCH
AIR EXHAUST
OPENINGS
FACING BRAKE
HYSTERESIS BRAKE
MOUNTING SCREWS
8S154
Figure 3-26. Motor and Brake Assembly
SIC' 10 Without PE39280B& Below
83313100
c
I
3-37
16.
Perform Brake Belt Adjustment procedure.
17.
Assemble four screws, washers, and
bushings. Lay screws at bottom of
drive cabinet so they will be close
at hand when installing drive motor
cast'ing.
18.
Support drive motor from below and
position motor mount casting below
deck on shock mounts (Figure 3-27).
Secure motor mounting casting to
shock mounts with four screws, washers,
and bushings prepared in step 17.
19.
Position drive belt around spindle
pulley, slip other end of belt
around drive motor pulley.
20.
Replace idler springs.
21.
Connect drive motor cable plug P7.
NOTE
Over tightening screws in step 18
will restrict freedom of movement
between motor mount casting and deck.
PACK SENSOR
ASSEMBLY
BRAKE BELT
ADJUSTMENT
SCREW
to
CABLES (NOT SHOWN)
P2-HYSTERESIS BRAKE
P3- SPEED SENSOR
P7- DRIVE MOTOR
DRIVE
MOTOR
Figure 3-27.
3-38
8S151A
Deck Assembly Bottom Side
83313100
A
22.
Connect hysteresis brake cable plug
P2.
23.
Set UNIT POWER circuit breaker to
ON.
24.
Install a scratch pack.
25.
Start spindle motor. Observe drive
motor for proper operation.·
26.
Stop drive motor.
27.
Remove disk. pack.
8.
Refer to Figure 3-30 and slide head
installation and removal tool on
outer edge of faulty head/arm assembly.
9.
Remove clamp plate securing faulty
head/arm assembly to carriage (Figure 3-29).
CAUTION
Observe the following precautions
during remainder of procedure.
a.
Do not touch head face. Damage
to gimbal springs may result.
b.
Use minimum force when overriding assemblies tendency to unflex.
Unnecessary force can damage
assembly.
c.
Use care when installing or removing an assembly. If assembly
is allowed to unflex,damage to
itself or to an adjacent assembly may result.
d.
Keep all contact with adjacent
head/arms to a minimum. This will
save alignment time later.
HEAD/ ARM ASSEMBLIES
Head/Arm Replacement Criteria
The head/arm assemblies are designed so that
they should not require replacement if given
proper preventive maintenance'and care. A
head/arm requires replacement if any of the
following conditions exist:
1.
Consistent oxide buildup on head
indicating repeated head/disk impact.
2.
Appreciable oxide buildup located
primarily on edge of ferrite insert.
3.
Oxide or wear over 1/2 of head face
surface.
4.
Head is scratched over 1/2 of head
face surface.
5.
Concentric scratches on disk surfac~
Inspect head for imbedded particles.
6.
Audible ping indicating that head is
hitting disk surface.
HEAD CABLE CLAMP
MOUNTING BRACKET
Head/Arm Replacement
HEAD ARM
ASSEMBLY
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Remove disk pack.
3.
Open cabinet top cover.
4.
Remove deck top cover.
5.
Remove head cable plate (Figure 3-28).
6.
Refer to Figure 3-29 and determine
location of faulty head/arm as~ly.
7•
Carefully rem::we head cable for faulty
head fran head cable clanp (Figure 3-29)
and disconnect related head cable plug
at card EOO.
HEAD CABLE
PLATE
SCREW(S) SECURING
CLAMP TO BRACKET
HEAD
CABLE
' \ HEAD CABLE CLAMP
HEAD CONNECTOR
AND PREAMP CARD
LOCATION EOO
Figure 3-28.
8018
Head Cable Clanping/Cormecting
o
83313100
A
3-39
HEAD/ARM ASSEMBLY
DISK
SURFACE
NUMBER
HEAD/ARM
REPLACEMENT
NUMBER
HEAD/ARM
NUMBER
n, G~~~D[l
o
I]
70590601
.00
01
00
..
01
..
00
..
3
03
4
[]3
..
..
..
01
00
..
01
... - 03
10
12
..
..
..
02
00
01
13
14
..
00
..
0 I
..
..
01
..
00'
..
•
01
00
II
15
16
17
IB
13
[[J
19
00
GUARD
DISK
IY4A
Figure 3-29.
Head/Arm Assembly Identification
10.
Grasp carriage end of head/arm
assembly (Figure 3-30) between
thumb and forefinger.
11.
Grasp other end of assembly (avoid
head face) between thumb and forefinger of other hand. Carefully
remove assembly from carriage and
head cam.
12.
Slip installation and "removal tool
off head/arm and set head/arm aside.
13.
Carefully flex replacement head/arm
(see Figure 3-29 for head/arm assembly part numbers) until straight
and slip head installation tool on
head/arm as shown in Figure 3-30.
14.
Guide head and tool through head
cam and toward carriage. Engage
carriage end of assembly and receiv.ing slot in carriage.
15.
Visually align free end of assembly
with adjacent assemblies.
Ir
fREAD/WRITE HEAD FACE
/ C A M SURFACE
~XEDPRDF~
FLEXED
7
(INSTALLED) PROFILE
16.
17.
Carefully slip head installation
tool free of head/arm assembly.
Instail head/arm clanp plate. 'lbrque
clamp plate screws to 4 bxili-~.
ASSELBLY
CARRIAGE END
FLEX POINT
OF ASSEMBLY
7J74C·
Figure 3-30. Head/ADn Installation and Rem:wal.
c
3-40
83313100
A
18.
Install head cable in cable clamp
(Figure 3-29). Make sure cable is
oriented similarly to adjacent cables.
19.
Install head cable plate.
20.
Connect head cable plug to logic
card EOO.
21.
Perform Head/Arm Alignment _procedure
on replaced head and on heads immediately above and below it.
2.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
1.
m.
n.
o.
Head/Arm Alignment
Head/arm alignme~t'§ performed by using the
Field Test unit. (FTUj) or by using micropro-gram diagnostlc:~ocrf~nes and a controller.
The following procedure uses the FTU for
alignment operation. Refer to the FTU
Maintenance manual for installation and
familiarization of tester ope-ration.
Refer to Controller manual for head alignment procedure using microprogram diagno&ics.
c
The CE disk pack and FTU must be temperature
stabilized before the following procedure is
performed. Pack, drive, and FTU must be in
the same temperature environment for a minimum 60 minute period immediately preceding
head alignment. In addition, the CE pack
must be purged on a drive a minimum of 30
minutes and the FTU must be plugged into the
drive, under maintenance, a minimum of 10
minutes before performing head alignment procedure.
NOTE
If head alignment is being performed
on more than one drive, the CE pack
needs only a 15 minute purge per
drive after head alignment has been
performed on the preceding drive.
with the CE pack and the FTU installed on
the drive and environmental stabilization
requirements met, perform the following procedure:
An oscilloscope may be connected
to the DIBITS test point to monitor
dibits during CE alignment.
3.
5.
Select Bus Out Bit 1 (BUS OUT switch
64- up; all other BUS OUT switchesdown) •
6.
LOAD UNIT/CAR/READ HEAD switch to
LOAD UNIT.
7.
LOAD UNIT/CAR/READ HEAD switch to
CAR.
.8.
Return all TAG and BUS OUT switches
to down position.
9.
START/STOP switch to START, then
return switch to STOP position.
Actuator should now be at track O.
NOTE
Transferring Diag Mode 4 (steps 4
and 5) followed by a Read command,
locks a Read command and a select
head in the drive.
Actuate WRITE DISABLE switch on the
drive control panel so that the
switch is illuminated.
10.
A
Install a logic plug.
-4. cSei~~t--T~i-'-]3'')(TAG switches 8, 4,
-crnd--l--up;--TAG'" switch 2- down).
The CE disk pack contains specially
recorded tracks of data. Extreme
care must be taken so that this data
is not modified or destroyed.
83313100
METER RANGE; OFF
R/W-SERVO; SERVO
CHECK STOP/RUN; RUN
ON LINE/OFF LINE; OFF LINE
All BUS IN switches; OFF
(down position)
All TAG switches; OFF
(down position)
ERROR STOP/OVERRIDE; OVERRIDE
ACC-R/W; R/W
REP/SING; SING
START/STOP; STOP
READ/WRITE; READ
DIR/SEQ; DIR
LOAD UNIT/CAR/READ HEAD; CAR
Actuate MASTER RESET switch
Actuate RTZ switch
NOTE
CAUTION
1.
Set up FTU switches as follows:
ACC-R/W switch to ACC.
3-41
11.
12.
13.
Using the FTU, perform a repeated,
direct seek between tracks 240 and
245 for a minimum of 30 seconds.
23.
stop actuator movement by placing
START/STOP switch to STOP. If
actuator stopped on track 245, continue with step 14. If actuator
stopped on track 240, continue with
step 13.
24.
Actuate ADV HAR switch. The BUS IN
indicators now indicate the next
head has been selected.
25.
Repeat steps 22, 23 and 24 for all
heads (0 through 18) .
Place the REP/SING switch in the
SING position. Then place START/
STOP switch in START position. After
actuator has moved to track 245,
place START/STOP switch ,in STOP
position.
26.
If offset is greater than 150
inches, adjust head so offset
less than 50 microinches.
~icro-
LOAD UNIT/CAR/READ HEAD switch to
CAR.
27.
METER RANGE switch to OFF.
28.
If any head was adjusted continue
with step 29. If no heads were
adjusted proceed with step 31.
14.
R/W-SERVO switch to SERVO.
15.
METER RANGE switch to 100.
29.
Unload and load heads a minimum of
two times.
16.
Calculate the offset via the following formula:
30.
Repeat steps 2 through 28 with the
following exceptions: if a head was
adjusted at any time during this
procedure, the specification for
necessity of adjustment in step 23
becomes 75 microinches (instead of
150 microinches) •
31.
Actuate MASTER RESET switch.
32.
Actuate RTZ switch.
33.
Stop drive and remove CE disk pack
and FTU.
(P)-(N)=OFFSET
P is the meter reading with the POS/
NEG switch in the POS position. N
is the meter reading with the POS/
NEG switch in the NEG position. Meter
readings to the right of zero are
positive. Meter readings to the
left of zero are negative.
EXAMPLE:
1.
2.
(- \
1S
\
P=20,N=15; (P)-(N)=(20)-(15)=5
P=20,N=-15; (P)-(N)-(20)=(-15)=35
HEADS LOADED SWITCH
17.
If the offset of step 16 is greater
than 50 microinches, a problem ~s
in the servo section of the drive
and must be corrected before continuing the head alignment procedure.
., .. "....... ·;·:c··.."
Adjustment
1.
Set UNIT POWER circuit breaker to
OFF •
2.
Remove disk pack.
3.
Open cabinet top cover and remove
disk cover.
4.
Make note of heads loaded switch
leadwire connection scheme and disconnect leadwires.
5.
Connect a multimeter (set to Rxl)
across switch leadwire terminals.
•
18.
Select(Tag 5)(TAG switches 4 and 1up; TAG . . switches 8 and 2- down).
19.
Select Bus Out Bit 4 (BUS OUT switch
8- up; all other BUS OUT switchesdown) .
20.
LOAD UNIT/CAR/READ HEAD switch to
LOAD UNIT.
21.
R/W-SERVO switch to R/W.
NOTE
CAUTION
The head address is displayed on
BUS IN indicators '1,2,4,8,and 16.
22.
Do not move carriage so far as to
cause heads to load. Switch transfer
will occur before head loading.
Calculate offset (as in step 16).
6.
3-42
Carefully move carriage about onehalf inch forward fran retracted stop.
83313100
A
'----
7.
Slowly retract carriage. Stop carriage at point where switch transfer
occurs.
8.
Using a steel scale, "ID:a.sure distance
that carriage travels before contac~
ing retracted stop. Switch transfer
must· occur when carriage is between
0.100 and 0.180 inch of encountering
retracted. stop.
9.
If requirement is not met, loosen
two screws securing switch mounting
bracket to actuator housing. Re~si
tion switch and bracket until requirement is met and tighten screws.
10.
Remove multimeter and connect heads
loaded switch leadwires.
11.
Install deck top cover.
12.
Close cabinet top cover.
Replacement
No special instructions are required for
removal and replacement except, when replacing switch, use one drop of Loctite, Grade
C, on threads of each screw securing switch
to mounting bracket. Perform Heads Loaded
Switch Adjustment procedure following switch
replacement.
DRIVE MOTOR
.46±.02
1.80±.OI
COUPLING
SLEEVE
~
HYSTERESIS
BRAKE
8Y52
Figure 3-30.1. Hysteresis Brake Replacement
SIC 10 with PE39280B & Above
HYSTERESIS BRAKE REPLACEMENT
SIC 10 WITH PE39280B AND ABOVE
1.
Stop spindle motor.
2.
Set UNIT POWER circuit breaker to OFF.
3.
Remove side panel of drive, or if drive
is in line, remove front panel and air
supply.
4.
Disconnect hysteresis brake cable-P2.
5.
6.
7.
Remove four screws attaching hysteresis
·brake assembly to drive motor.
Remove hysteresis brake ass.embly,
observing orientation of brake power
cable.
Remove rubber coupling sleeve.
to Figure 3-30.1.
8.
Loosen two set screws securing coupling
flange to hysteresis brake shaft. Remove flange.
9.
Remove three screws attaching hystere~
sis brake to brake motor mount and
remove brake.
10.
If necessary to remove flange from
drive motor shaft, loosen two set
screws and slide off.
11.
Install replacement hysteresis brake on
brake motor mount with three screws.
12.
Install coupling flange on hysteresis
brake shaft to meet the requirements of
figure 3-30.1. Tighten two set screws.
13.
Loosely install coupling flange on
motor shaft.
Refer
(1
"--/
83313100
C
3-42.1/3-42.2
,-,
(.'1
14.
Install rubber coupling sleeve.
10.
15.
Install hysteresis brake assembly on
drive motor using four screws.
(Orient
brake power cable to connect to P2).
Install replacement hysteresis brake
to brake mounting plate with three
screws and washers.
11.
Apply one drop of Loctite, Grade N
to pulley setscrew threads.
16.
I
Tighten set screws in coupling flange
on motor shaft so that flange position
meets the requirements of Figure 3-30.1.
17.
Connect hysteresis brake cable-P2.
18.
Install air supply and front panel.
19.
Perform Power Down check.
NOTE
It may be necessary to loosen (turn
counterclockwise) the brake belt
adjustment screw to allow pulling
brake back far enough to perform
steps 12 through 14.
12.
Pull brake back and slide pulley on
brakeshaft but do not tighten setscrews.
13.
Hold pulley adjustment block in position shown in Figure 3-31. Push
brake forward and adjust pulley on
brakeshaft until adjustment tool
seats in groove of pulley.
14.
When they are mated as shown in Figure 3-31, the pulley is aligned.
Tighten setscrew and remove pulley
alignment tool.
HYSTERESIS BRAKE REPLACEMENT
SIC 10 WITHOUT PE39280 AND BELOW
NOTE
The drive motor mount casting may
have to be loosened in order to
remove brake.
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Open cabinet rear door.
3.
Remove idler springs.
4.
Move drive motor towards spindle
assembly and slip drive belt off
drive motor pulley.
5.
Disconnect hysteresis brake cable P2.
6.
Turn brake belt adjustment screw
counterclockwise to relieve tension
on brake belt (Figure 3-26).
7.
Slip brake belt off brake and drive
pulleys.
8.
NOTE
9.
In step 15 always use new belt and
ensure that brake is far enough forward that belt can be replaced without riding it onto pulley.
15.
Replace brake belt on drive pulley
ensuring that it is seated properly.
Slip other end of belt over brake
pulley.
.
16.
Position drive belt around spindle
pulley and slip other "end of belt
around drive motor pulley.
Loosen setscrew securing brake
pulley to brake shaft. Remove
pulley and check condition of
groove.
17.
Replace idler springs.
18.
Connect hysteresis brake cable plug
P2.
Remove faulty hysteresis brake.
19.
Perform Brake Belt Adjustment procecure.
c~
83313100
C
3-43
BRAKE5HAFT------~
DRIVE MOTOR
PULLEY
BRAKE
PLATE
BRAKE PULLEY----'
85155
I
Figure 3-31. Brake Pulley Adjustment
SIC 10 Without PE39280B.
PACK SENSOR SWITCH
Check
Adjustment
1.
Press (to extinguish. light) START
switch.
2.
Install a disk pack.
3.
Set UNIT POWER circuit breaker to
OFF.
4.
Refer to Side Panel Removal/Installation procedure and remove right
(viewed from front) side panel.
1.
Stop spindle motor.
2.
Remove disk pack.
3.
Set UNIT POWER circuit breaker to
OFF.
4.
Remove cabinet front panel.
5.
Identify pack sensor switch leadwires (Figure 3-32). Disconnect
leadwires at switch.
5.
Identify pack sensor switch leadwires (Figure 3-32). Disconnect
wires at switch terminals.
6.
connect a multimeter (set to Rxl)
across switch terminals.
6.
7.
Install a disk pack. Multimeter
should indicate 0 ohms.
Dimension between actuator arm and
lockshaft must be as specified in
Figure 3-32. If dimension is as,
specified, go to step 10. If adJustment is required, go to step 7.
8.
Remove disk pack. Multlmeter should
indicate infinity.
7.
Loosen mounting plate adjustment
screw (Figure 3-32).
9.
If requirements of steps 7 and 8 are
not met,perform Pack Sensor sw~tch
Adjustment procedure.
If requlrements are met, go to step 10.
8.
Loosen two screws securing ground
spring mounting bracket to switch
mount.
9.
position mounting plate until dimension between actuator arm and lockshaft is as specified in Figure 3-32.
Tighten screws.
10.
Disconnect multimeter leadwires.
11.
connect pack sensor switch leadwires
to pack sensor switch terminals.
12.
Install cabinet front panel.
3-44
83313100
C
(-".
\...j
SPEED SENSOR
MOUNTING· BLOCK
GROUND SPRING
TERMINAL LUG AND
ADJUSTMENT SCREW
SWITCH MOUNT
o
O
V
GROUND SPRING
MOUNTING
BRACKET
I~==========~~C=~
®
8525
F~gure
10.
11.
12.
3-32.
Pack Sensor Assembly
connect a mu1timeter (set to Rx1) to
pack sensor switch terminals (Figure
3-32). Meter must indicate 0 ohms.
If correct go to step 12, if not go
to step 11.
13.
Mu1timeter must indicate infinity.
If not, go to step 14. If correct,
remove feeler gage and go to step 17.
14.
Loosen pack sensor switch adjustment
screws and position switch until
mu1timeter just indicates 0 ohms.
Tighten screws.
Loosen pack sensor switch adjustment
screws and position switch until rrultimeter just indicates infinity.
Tighten screws.
15.
Remove feeler gage. Mu1timeter must
indicate 0 ohms. If correct, go to
step 16. If not, repeat procedure
starting at step 11.
Insert an .011 inch thick feeler
gage between actuator arm and stop
pin (dimension A of Figure 3-32).
83313100
A
3-45
16.
If pack sensor switch was ~si~,
perform step 5 and if further adjus~
ments are required repeat entire
adjustment procedure. If requirements of step 5 are met, go to step
17.
17.
Disconnect multimeter from switch
terminals.
lB.
Connect pack sensor switch leadwires
to switch terminals.
19.
Perform Ground Spring Adjustment
procedure if mounting plate screws
were loosened.
20.
Install side panel.
Replacement
1.
stop spindle motor.
2.
Remove disk pack.
3. 'Set UNIT POWER circuit breaker to
OFF.
4.
5.
Refer to Side Panel Removal/Installation procedure and remove right
(viewed from front) side panel.
Identify pack sensor switch leadwires. Disconnect wires at switch
(Figure 3-32).
6.
Disconnect servo head cable plug and
output plug PB from servo preamp
board.
7.
Remove two socket head screws inside
preamp housing. Remove preamp housing from unit.
B.
Remove two screws securing faulty
preamp circuit board to preamp housing.
9.
Install replacement preamp circuit
board to preamp housing with two hex
head screws. Tighten screws.
10.
Install preamp housing on actuator
using two socket head screws.
Tighten screws.
11.
Connect servo head cable plug and
output 'plug PB to preamp circuit
board.
12.
Using two screws, secure preamp
housing cover to preamp housing·.
Tighten screws.
13.
Install right shroud side cover
using four screws. Tighten screws.
14.
Install deck cover and close top
cover.
Remove two screws; washers and nuts
securing switch to mounting plate
bracket. Remove faulty switch.
7.
Install replacement switch to mounting plate bracket using two screws,
washers, and nuts. Do not tighten
screws.
2.
Remove disk pack.
3.
Release two turnlock fasteners seCU1~
ing cabinet front panel. Remove and
set panel aside.
Perform Pack Sensor Switch Adjustment procedure.
4.
Lower two leveling jackscrews in
front base of cabinet until casters
contact floor.
5.
Open cabinet rear door.
6.
Lower two leveling jackscrews in
rear base of cabinet until casters
contact floor. Close cabinet rear
door.
SERVO PREAMP PC BOARD REPLACEMENT
1.
Stop drive motor.
2.
Remove disk pack.
3.
Open top cover and remove deck
cover.
4.
Remove four screws securing right
shroud side cover.
5.
Remove two screws securing servo
preamp cover (Figure 3-16). Remove
cover.
' ....
,
...-
SIDE PANEL REMOVAL/INSTALLATION
6.
B.
r-~
'I.
Set UNIT POWER circuit breaker to
OFF.
CAUTION
Use care when wheeling drive cabinet
out of line so that input/output
cables and oonnectors are not darraged.
7.
Roll drive clear of adjacent units.
c
3-46
83313100
A
8.
Open cabinet rear door.
2.
Remove disk pack.
9.
Release two quarter-turn fasteners
securing panel side cover. D~
side panel ground wire. Remove and
set panel aside.
3.
Use feeler gage to check that gap
between sensor tip and pin is 0.023
(±0.003) inch (Figure 3-33).
4.
10.
Install side panel and return unit
to normal operating position by reversing steps 1 through 9.
If requirement of step 3 is not met,
adjust speed sensor as follows:
a.
Check speed sensor lateral
alignment per requirements of
Figure 3-33. If required,loosen
mounting block adjustment screws
and position assembly. Tighten
screws.
b.
Loosen locknut on speed sensor
assembly.
SPEED SENSOR ASSEMBLY
Adjustment
1.
set UNIT POWER circuit breaker to
OFF.
STEEL PIN
~SPINDLE
I
PULLY
r---, ' .
"--.j
AV
SPEED
SENSOR
; . - - - - - - - S T E E L PIN MOUNTED
ON SPINDLE PULLEY
~!":""------SPEED
SENSOR PICKUP
I
I
MOUNTIN]0_0
BLOCK
ADJUSTMENT
SCREWS
L - - - -
A -A
SPEED SENSOR POSITION CORRECT
WHEN STEEL PIN AND SENSOR
PICK UP ARE CENTERED AS SHOWN
8DI46A
Figure 3-33.
Speed Sensor Adjustment
o
83313100
A
3-47
c.
Adjust sensor assembly (cl~
rotation closes gap,counterclockwise rotation widens gap) as
required.
CAUTION
Do not over tighten locknut in
next step.
5.
d.
Torque locknut
pounds.
e.
Recheck dimension of gap.
Lockshaft Replacement
1.
Stop spindle motor.
2.
Remove disk pack.
3.
Set UNIT POWER circuit breaker to
OFF •.
4.
Refer to Side Panel Removal/Installation procedure and remove either
side panel.
5.
Disconnect ground spring leadwires.
6.
Identify leadwires to pack sensor
switch.
7.
Remove two screws securing ground
spring mounting block to switch
mounting block.
8.
Remove mounting plate adjustment
screw (Figure 3-32). Remove mounting plate.
to 5 (tl) inch-
Perform Speed Sensing procedure of
Miscellaneous Logic Checkout.
Replacement
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Disconnect speed sensor cable plug
P3.
3.
Cut cable tie securing speed sensor
leadwires to speed sensor mounting
bracket.
4.
Loosen locknut on faulty speed
sensor assembly (Figure 3-33).
Remove assembly from unit.
5.
Install replacement speed sensor on
speed sensor mounting bracket.
6.
Perform step 4 of Speed Sensor
Adjustment procedure.
NOTE
In the following step do not remove
retaining ring securing springs in
spindle assembly (this is retaining
ring located behind flat washer removed in next step).
9.
Carefully raise faulty lockshaft out
of top of spindle assembly.
11.
Lower replacement locks haft into top
of spindle assembly.
CAUTION
Do not over tighten lo,cknut when
performing step 7.
Torque locknut to 5. (tl)' in::h-poonds.
Recheck gap.
8.
Connect speed sensor cable plug P3.
9.
Secure speed sensor leadwires to
mounting bracket with two cable ties.
10.
Before proceeding, make certain that
locks haft is free to move downward
against internal spring force. Lockshaft must be free and not bind.
12.
Install flat washer. and retaining
ring on lower end of lockshaft.
13.
Position mounting plate on switch
mount as shown in Figure 3-32 and
loosely secure plate to mount with
mounting plate adjustment screw.
Perform Speed Sensing procedure
described in Miscellaneous Logic
Checkout.
NOTE
SPINDLE AND LOCKSHAFT ASSEMBLY
Field repair of this assembly is limited to
replacing the lockshaft. If replacing lockshaft does not correct problem, replace
entire spindle assembly. Return faulty assembly to factory.
.
3-48
Remove retaining ring and flat
washer from lower end of lockshaft.
10.
CAUTION
7.
1""'-"\
position ground spring mounting
bracket so that contact on end of
spring is contacting lockshaft.
14.
position grourx:1 spring IIDUIlting block on
switch Il'OUllting block (Figure 3-32) and
loosely secure block with bx> screws.
83313100
A
c
15.
Perform Pack Sensor Switch Adjustment procedure.
16.
Perform Static Ground Spring Adjustment procedure.
l~.
\, _ _ .1
Place repla~ement spindle assembly
on deck (or~ent flat surface on side
of spindle assembly towards drive
moto~).
Positi~n spindle assembly
on p~ns protrud~ng from deck and
press down on spindle so that pins
begin entering spindle.
Spindle and Lockshaft Replacement
1.
stop spindle motor.
2.
Remove disk pack.
3.
Set UNIT POWER circuit breaker to
OFF.
4.
Refer to Side Panel Removal/Installation procedure and remove either
side panel.
5.
Identify leadwires to pack sensor
switch and ground spring.. Disconnect leadwires.
6.
7.
Disconnect speed sensor cable plug
P3.
Tighten spindle down evenly over
pins, keeping spindle bottom surface
parallel to deck surface.
16.
Install three screws and washers. to
secure spindle to deck. Tighten
screws so that lateral movement of .
the spindle is possible.
17.
Install drive belt on spindle pulley.
18.
Move drive motor mounting plate towards spindle assembly and slip drive
belt around drive motor pulley.
19.
Po~ition pack sensor assembly' on
sp~ndle
Move motor mounting plate towards
spindle to relieve drive belt tension. Remove belt from drive motor
pulley. Release motor mounting
plate.
8.
Remove drive belt from spindle
pulley.
9.
Open cabinet pack access cover.
10.
NOTE
Remove five screws securing brake
cover to shroud (Figure 3-21). Remove brake cover.
NOTE
Before tightening screws in next
step, position pack sensor assembly
as close as possible to the dimensions shown in Figure 3-32 and 3-33.
Doing this will minimize adjustment
required after assembly is secured
to the spindle.
20.
Secure pack sensor assembly to
spindle assembly with two screws.
Tighten screws.
21.
Secure brake plate assembly to deck
using two screws and related brake
plate hardware.
22.
Install brake plate cover to shroud
using five screws. Tighten screws.
23.
Connect ground spring and pack
sensor switch leadwires.
24.
Connect speed sensor cable plug P3.
25.
Perform the following procedures:
NOTE
While removing asse~ly in next step
observe mounting technique used to
secure brake plate assembly to deck.
11.
Remove two screws securing brake
plate assembly to deck casting (Figure 3-21). Remove and set assembly
aside.
12.
Remove three screws (under deck)
securing spindle assembly to deck.
13.
Grasp spindle drive pulley and
alternately push and pull on assembly while applying upward force to
free spindle assembly from two
round pins driven through spindle
flange and into deck.
14.
83313100
Lift spindle assembly up away from
deck being careful not to damage
shroud.
A
assembly as shown in Figure
3-27.
a.
b.
c.
d.
e.
Pack Sensor Switch Adjustment
Static Ground Spring Adjustment
Speed Sensor Adjustment
Carriage/Spindle Alignment
Head/Arm Alignment
3-49
STATIC GROUND SPRING
8.
Connect ground spring leadwire.
Adjustment
9.
Install side panel per Side Panel
Removal/Installation procedure.
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Remove disk pack.
3.
Refer to Side Panel Removal/Installation procedure and remove left
(viewed from front) side panel.
4.
Visually check that ground spring is
approximately centered on lockshaft
(Figure 3-32).
5.
6.
If required, loosen screw securing
ground spring to mounting bracket
and center spring as required.
Tighten screw.
Place a .002-.005 inch non-metallic'
feeler gage between ground spring
and lockshaft.
VELOCITY TRANSDUCER OR
MAGNET REPLACEMENT
1.
Set UNIT POWER circuit breaker to
OFF.
2.
Remove disk pack.
3.
Open cabinet top cover.
4.
Remove deck top cover.
5.
Disconnect velocity transducer cable
plug P4 (Figure 3-34).
6.
Remove two screws and washers securing velocity transducer end cap to
magnet assembly. Retain cap,screws,
and spring (located inside cap).
7., Hook a push-pull gage to outer end
of ground spring.
8.
9.
10.
Force (applied perpendicular to
spring) required to allow feeler
gage to fall free should be 125
(±25) grams.
CAUTION
Use care in the following steps so
that extension rod is not damaged.
7.
If required, carefully bend spring'
to adjust spring tension.
Install side panel per Side Panel
Removal/Installation procedure.
8.
Set UNIT POWER circuit breaker to
OFF.
2.
Remove disk pack.
3.
Refer to Side Panel Removal/Installation procedure and remove left
(viewed from front) side panel.
(~
Carefully pull transducer magnet and \----'
extension rod out of cap end of
transducer coil/housing.
NOTE
Replacement
1.
Unthread extension rod at point
where it enters rear of head/arm
receiver.
Omit steps 9 and 14 if only
magnet is being replaced.
9.
th~
Remove transducer coil/housing from
magnet assembly.
CAUTION
4.
Remove static ground spring leadwire.
5.
Remove screw, nut, three washers,
terminal lug and ground spring from
contact mounting bracket (Figure
3-32) •
6.
Install replacement ground spring on
, contact mounting bracket using one
screw, one nut, three washers, and
terminal lug.
10.
Carefully remove replacement transducer magnet from shipping container.
Perform Static Ground Spring Adjustment procedure.
11.
Place replacement magnet alongside
old magnet to determine correct
7.
Replacement velocity transducer magnet
can be remered unuseable if it c::ares in
contact with a ferro magnet object. Assembly must be noved rut of magnet at
least 18 inches before changing direction.
New assanbly must not approach the magnet
closer than 18 inches except fran center
rear. D:> not place transducer magnet on
any metal surface.
c'
3-50
83313100
A
EXTENSION ROD
VELOCITY TRANSDUCER
END CAP
I
SPRING
9mmD~--VELOCITY TRANSDUCER
MAGNET
Figure 3-34.
Velocity 'Transducer Replacement
polarity (like poles repel). Note
. which end should connect to extension rod and return magnet to shipping container.
12.
13.
Carefully unthread extension rod
from old transducer magnet. lwbderate
force may be required since Loctite
is on rod threads.
Slide replacement transducer coil/
housing into magnet assembly.
15.
Insert free end of extension rod
into bore of coil/housing. Slide
assembly into coil/housing until
threads of extension rod are visible
behind head/arm receiver.
83313100
17.
Install head cam tool and fully extend carriage.
18.
Assemble spring and transducer end
cap to magnet assembly using two
screws and washers.
19.
Connect velocity transducer plug P4.
Apply one drop of Loctite,Grade C,
to extension rod threads that mate
with transducer magnet. Observing
polarity that was determined in step
11, thread rod into end of new
transducer magnet.
14.
16.
Apply one drop of Loctite,Grade C,
to extension rod threads. Using a
pliers and only moderate force, install extension rod in head/arm
receiver.
A
7J78
NOTE
Transducer polarity is correct when
A27,TP-F swings in negative direction while actuator is manually
moved in forward direction.
20.
Remove head cam tool.
21.
Perform Integrator Gain Check and
Adjustment procedure.
22.
Perform Velocity Transducer Gain
Uniformity procedure (Velocity Logic
Checks) •
23.
Perform Velocity Gain Adjustment
procedure.
3-51/3-52
,~
I
''"--
SECTION 4
DIAGRAMS
'
C
"
c
INTRODUCTION
This section contains diagrams that logically
describe the drive in terms of the functions
which the unit performs and schematics that
show the wiring of the various assemblies.
Descriptive material for integrated and discrete component circuits is located in
Sections 4, 5, and 6 of the Reference manual
(Publication No. 83313200). Flow charts,
83313100
A
simplified circuits, and timing diagrams are
located in the same manual.
Logic sheets 1 and 2 and sheet 1 of all assembly schematics (located at end of sectio~
are not inc·luded in this manual. They are
for ~actory use only.
4-1/4-2
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-
-
-
-
-
AZlIl
~
+ 10V
I
LOGIC
t:
•
- a 011
.
INTERLDCII
14
'ROil CONTROL PANIL
OPERATOR CONT. PANEL A4S7B
LOIIC INTERLOCK
10
II
nOli DECIC
TO DICIC
WRITE POWER
LAMP POWER
+9.711
IS
II
I
(A2A3P1-2)
+20Y
- 1.711
..-
A2T82-1
TO OECII
A1PI - 38. A2A1 UNREG
I
AlPB- 3A
-
tr
A2PA10-28
- 20V
A2PC30-28
TO DICK
TO OPERATOR PANEL
A1PB - 48. A2AII UNREG. AZA1Pl- I
1
-
A Z5Z
TO DECII
A2,.30-IU
AIP030-I3B·
A2T81
I 2)A2T82-1
A2T82-2
4
5
LOGIC GND
LOGIC GilD
&2T82-2
6
LOGIC GNO
1
rIO
Gill 0
I:IO
XIO
rIO
rA
GND
GNO
10
.......
A2PAIO
+ZOV
..
G"'C
GNO
A2JAlO
,.-r--
MAINTENANCE
LOCAL
--------------------------------i
-------------------------------1
-----------------------------------i
-----------------------------------i
-------------------------------------i
POWER AMPLifiER {SIGNAL
X
>C
CURRENT SENSE
GND
- - - - - - - / ....-+,,-:.1------------J
LOGIC INTERLOCK
MOTOR RELAY SENSE
PULL SPEED RELAY
PULL MOTOR RELAY
-------1-
rSOLATEO 46V GND
fWD
SERVO SIGNAL { REV _ _ _ _
ISOLATED 46V GND _ _ _ _ _ _ _ _ _....J'
x:
------------------------i
r----
In
L
·PHYSICAL
LOCATED ON TEST POINT PIlNEL
c
4-77
I
4
~
I
2
i
'-l
AlTiI
co
AZTIZ-IS - - - - - - - - - - - '
AIA101-4
NOTE.,
I.
ro1
c"V
AZI"ADO-TA
JI-CL
J2-CL
-
!~g~ PLUS
... • "
~I'
o
0
Z4°, ~
~
U
o
0
.... 0
c
AZTII
fi6I
I
D
I
~J~~~~J
AZPAIO-IA
AZCII-PLUS
+IOY
NO
AZTII
0 Ai.
0 COM
o
UtI! - PLUS
+ZOY
-,
,,r
AITDI -II (AIOI-'I
RUIIACT RnAY, K5 (VIEWED rROM TOP)
~ ~NC
@
@
@
INTERLOCK
MLAY(IXC£JtT ItfTlUCT.IUII SOCKET INDENTI'ICATION:
(¥11ft!) nOlI TOP)
1° 50 8°110
4050 40'0
10101010
It
L
2.
CONTROL
141-1- - - - - - - - ,
PMT 01' DECK UIY.A', SHOWN 'OR ItEFEIIOICI ONLY.
PAItT 0' OPEIIATOII PANEL,A4, SHOWN
'OR
AZTII- I'
IIEFEIIENCE OICLY
AUXILIARY SWITCH CONTaCTS 011 RELATED
CIItCUIT ellUUlt.
.
i 0
IT:'
,.
@I
c
------
--------------+---01-..,
A2
I
I
PULL SPEED
RELAY
+ ZOY LAMP PWR
TO OPERATOR PNL
AZCU-PLUS
+20Y
WRITE PWIt
PULL IIOTOR RELAY
rA3 SENSiNG-eOARO- - - -
AlTaZ - II
1--_ _..::~~~II~v
I
i
I
I
ftall
a
START MOTOII
UPAIO- ZI MOTOR RELAY SENSE
I
AZCI2-1
+ •.1Y
B
B
I
la I
Itll
PI-IZ' .
I
+ZOT
f
CRT
00
w
III
~
t~~.'v
hCRZ/CR3
III
AZTIZ-4 ._ _ _ _ _ _ _ _
'-~
:.
,
-@---i
HYlTEIIU..'
HAICE
,
I
HEADS
,
LOAIIED SW
---,
iDiiiiD
,
TO LOGIC
CHAII"
I
I
A
I
I
AL
RETRACT
RELAY
~-..J
PI-II
I
- __ l!~!:.!_l~~ ___ ---~~-.!i!!~---'
AICI -IilINUSS-----'
-(IV
W
I-'
W
I-'
0.1
4T
CIIS
C I t : r ___
I!!-~LI!..
AlTIi
!... ~
re,
02
~+
A
FAULT
O£'ECT
AV'ASO-IA
I
liZ
UK
VIII
I5V
-lav
__ J
IL
DRIVE MOTOR
INTERLOCK
o
o
4
!to'
3
"\
()
/
)
)
r-,
/,
~ )
'"
...
1
3
4
co
w
w
.....
w
.....
o
o
(\
2
1
A2T1I2
AZTIII
+20YN
AZA2PI-4
AZAZPI-I
AIAIPI-I
+..l..CII
-T"oo
OJ
Z4VAC
IS
1----------~H
AZT84- I
(8RUSH MTRI
AZAIPZ-I
AZA3I'1-10
AIDSI-T
"211-13
AZTeS-1 (Z)
AZTa'-1
AITS'·'
AZCDIA
~W
r--,--~--4-----~0I
RI
1'0
AUI-MINUS
AISI -AZ
AZAZPI-S
AZCIIS-'
D
42AZPI-13
10
:21~----------------------------~L------··
I
I
~
A3FL4 ,AIPAIO-18
AIPC30-18
I
AICIIII
------~--1---------------~O
.
I
I
+5V
I
AZCII
.10
BOARD
REG
LOGIC PNL + vec , A3FLI
I
CII.l·
110,0001'_
CI
fRI
110
AIAIPI-I
II
I
I
I
I
SERVO PREAMP UPI-411
c
GND
CIO
11,000
-9.TV
AZSt
A3FL3
AZPB30- 138
4ZPDIO-138
AISZ
I
(ZOVIGND
-lOY
A4DS6A-T
A4DS68-T
A4DS4A-T
A4DS4B- T
AZOSI
.Z()Y
+I."V
:1.-
AZA3PI-6
II
4
I
Alcn
-IIV RE8ULATOR BOARD
I
LOGIC PNL-YCC, A,FLI
-10
+46Y I 10
L
I
SERVO 'REAMP
AIPI-38
+48
.,
CS
10,000
AIAITII-I, AIA6-PLUS
AICI4
I
I
1110
~--~--------~-------?-----------AITIS-5
CI
80,000
B
-46V I
R4
150
-,46
II
I
-IIV I IZ
"rs
co
~
o
AZAITIII-IO,AIA6-MINUS
I
AZCIS
I
B
CI..J...·
•
"OPOO1-
COM
AIIlSA-NC,AlASPI-14
AIIlIII
AIA104-4
AZASPI-IS
AIP.,,,)- .,
DRIYE MOTOR
INTERLOCK
NOTES'
I.
®
A
AIAI04-'
A2A2PI-10
AIAI0'-3
AIAIOZ-'
SHOWN FOR
A
A2 LOGIC CHASSIS
IlC POVfER SlIPPLY
I
\D
REFER TO A2A2 RELAY BOARD.
REFERENCE ONLY.
START IIOTOIt
",.
"
REFER TO AI POWER SYSTEM SCHEMATIC FOR
INPUT WIRING TO A2TB2.
4
3
··.0
CD
III~O"
A2"1'
1,1- 51
'OA
IU
III'OZIAI- "
i~ A~T;-'
"':
BRAKE PO,IWER
NC
.08
..
A3J2
I
~a C
III~06lA Z - III
A3P2
-:
15 .....~--------------f
I
AllBl -9
LOGIC GNo
AS54 NCK ON
I
GNl1
LOG"
8 ~----'T'"--------':~-f
ASPUO
112')0,1118 -,De
IU,U,II •• - 78
lu.u,a,e·IOA
11411'7)015-121
IUIl61",.- U
IU"5,1I11- lit!
IU.14,811- 98
(14815101 !I-78
N
.A
.8
"
.B
2A
2A
12
-u
E2 ·4.
ZB
:SA
lB
E2 - "
[2-51
SA
'2 -121
U
4A
S8
4A
48
'2 -III
5A
E I -III
41.
!lA
']P~
'2 -IIA
U
58
"
- tl
iii
1I502411Ot- 58
IA
"
-II
ffim LoCK
11I20'1A1I-71
IIU,.,OZZ-,III
,.
oA
n
7A
7A
1'1 - II
[I -148
71
'II
IIA
1I5426,A,?- 1411
III
I122(16ICII- 101 U
!IU.,IoU, IA IIA
nuoo,o., - 6A 14'
ONODI'-14A .48
II
8A
.4 A
148
tI -,7A
1'3 -II
"
E3
E'
E4
IV5200,
CD 12TIII
(1520~1
251
IV5200'
"'R.T( rURRENT SENSE
IIULT • .,£AO FjlULT
~~~~:~~CK
NC
A2CB4· NO 81----'---"C.o()/ A]51
1l~2071
145711-C
1149521
~
'WE"
PAC"
CovEll
=---"NO
AGC SHORT TC IA~SOOI
"~ZOOI
oroc LEVEL DE T (A53,OI
AC WRIT E rAULT (K!l2001
GROUND
TI2
-71
lOB
-14A
- "
ASP]
~PfEC
1"001111-71
GHD liZ -
FIRST SEEK
1I0TOR
'2 -12A
114?OI,r " - 128
Irnoz,AI' - 41
lt500]JA10 -7A
ASJ5
TRANSDUCER
~A
ASPE5-2B
ASPf5-ISB
UJ4 A3P4
VELOCITY
+ 20V A2 T., - I
TRANSDUCER
AlTlI' - 2
-20V
"Prll,
CENTRifUGAL SWITCH
4
LOGIC GNO
IAl03-4'
STAIIT CONTR.
(Al04 -4)
etA
(AlQ4-I'
A
ASPES
,
TO CARD
W'W P'NS
E4
(AI02-'2~
READ ANALOG
M
O/IIII[
1I0TOII
RELAY COIL
IAICIZ-14)
II<
UHI
OUT
IN
Alfl2·
OUT
Anll-S+
lie (
AITII- 4 -
ve e ~'~~------------------ - vec
'8
----~~--------------
IN
(A103 - r)
WRITE POWER A2T1.- IS
S"'(TY IHO
I
AZ.ii16-;-~iP.,1 - ,
SHiElD
,
Al"IU- COlli
UJI
·9V
-'V
GNO
lit
GI'"'''[(1011
CARD IEOI 0'"
R/'" CHASS'S
GNO
A2JIZ0 A2P8Z0
AlPfS
ANALOG
R[AO IA51071
~UTII-II
•• -.7V
UTII _ 7
~.:
UTII _.
... 7V
TS Til
810
I
~I
I
SIGNAL
loa~~------------------------~~
Ii)
[§A2;;'4~1
-AUAi4
(n004)
.11
§
A3PEI
WRITE
~--:-I----"""'"'\X
OAU
,'0'1
tA.-~--:-,------' ' - - - - - - - - - - i
l _______
TO CARD EI
I" 5200)
-.J
IIOTES:
PAIIT OF 102 LOGIC CHASSIS. SHOWN FOR "EFERENCE ONLY.
UPI COhNECTS TO SEllVO PIIE.IIP CARD
('
\.. ...•.
4-80
83313100
A
u
'Q
·_"
C
AITBI-II
LAIIP POWER ®
+IOY
I
- ./
START
r------=--4JI~:.........--~------t_-_-- AI TIl-II
+
lOY
..
START GROUND UTBI-14 - - - - - - - - - - - . - . - - - - - . .
NO
INTERLOCk 42T81_10 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _..:;ta.~
usn
-
u
....
ZI-
.J
f"),.
I
NC
I
"''''....
START
IWITCH
11.2
0:::1:
0
°
... 11)
"'>-
O::.J
.... m
~2
I
"''''
IELECT LOCK
N
(115071 A04. 4A
3A .1-------.,.".,-,,.,,..,.
(L5041 A06-98
5A 1-----.l4J.~-~~_::__:~~_r------_f
(LIIOIII A06-9A
581--------......;:.+' '+"-_---J
A4DSIB
(11120) C08 -138
....
II)
VII)
A2PAIZ
AIT8I-1
(GROUND)
6A I--.=.LA:.:.;P.....;.I--+-----.
NO
(111100) AOI-U
8A
A4S.
LA,. III
NC
@
(iCTiVEl
I3915
AOI-18
4A
(L503) A06-SA
41
CE TE STfR • JAI0-7A
A4DU8
NOTES'
CD
NO
ON
.UII OFF
WRITE DISAILE
NC
SWITCH POSITION IIANI,.ULAUD 1'( UIUTIOII Of" "LOGIC ADDRESS PLUG,"
THIS UNIT SHOWN WITH LOGIC PLUG NUIIIER ·0· INSTALLED.
( A411 ONLY ACTUATED)
(J)
VOLTA8E IS A,.PLIED WHEN +SV IS UP AND
REMOYED IEfORE +IIV IS DOWN.
@
WHEN ILLUMINATED IT SIGNIf"IES THAT THE UNIT IS READY.
THE LENS WHICH IDENTIFIES THE· PHYSICAL ADDRESS· OF
THE UNIT (3 OF I CODE) WILL IE INSTALLED ON SITE.
@
WHEN UNILLUIiINATED IT SIGNIFIES THAT
THE UNIT IS ACTIVE. (HALF OF LENS)
u
8331:3100
A
4-81
Q
- - - - SIGNAL CABLE - - - A2PCOI
MOO SEL GATE
;
SIG BUS OUT BO 127 ,
:
SIG BUS OUT BI 128 ,
~
I
:
'-----..Jv'-~
TAG BUS OUT"B2IZ ,
__ .,.--, A
SIGNAL GND
M
S
rv',,----,
L--J'V"---,
SIGNAL GND
T
B
'_--fl"_--'
H
U
U
SIG BUS OUT B3 12 4 ,
V
V
I _-I'~ " - - - '
Z
SIGNAL GND
F
SIG BUS OUT B2 12 5 ,
TAG BUS OUT B8 IZ 3,
SIGNAL GND
i
C
H
TAG BUS OUT B4 IZ2,
' .........
i
1_---1'''''---'
TAG BUS OUT 81 IzO,
I
- - SIGNAL C~BLE CON'T-FROM CU
A5 JI
TO NEXT UNIT
OR TERMINATOR
AIPI
i
-
...
•
()
Z
0
DRIVE SEL IN 82 12 5 ,
o
~11.1'-
SIG 8US IN 8!l I Z 2,
ZCl
Cl2
SIG 8US IN B8 IZ I ,
Q.II.I
:x:
TAG BUS OUT P
00
,CI)
SIG BUS IN BIT P
SIG BUS IN 87
AZPDOI
SIG BUS OUT B4 12 3 ,
H
o
Ill'
(20,
ClH
W
A2POO'
SIG BUS OUT B5 12 2 ,
N
DRIVE
SEL IN B5 (2 2 ,
DRIVE
SEL IN B4 12',
TAG GATE
SPARE
SIG BUS OUT B6 (Zl,
SIG BUS OUT B7 (2 0 ,
SIG BUS OUT
P
iii
iii
R
ii
ii
ii
d
i
i
i
c
METERING IN B
OEVICE CHECK IN
AR
AV
AR
AV
DRIVE SEL IN 87 12 0 ,
AS
AW
AS
AW
IZ 4 ,
AH
AM
AH
AM
DRIVE SEL I'N
n
1~
RESERVED {
BB
AY
5A
BJ
BC
5B
BN
'ItOM CU
IA
BE
AS .III
POWER
i
•
SERVO DATA
AA
4-82
I
-: ,-,
:
I
I
'-
IA
IB
IA
88
I
' ....
I
I
15A
15B
ii
POWER SEO HOLD
CL
CR
POWER SEO +24V
-: 6A
__
6B
,-,
q
POWER SEQ COMPLETE
HEADS EXTENDED
IA
I I
18 L...L.~:---'
A8
!lB
7A
i
CM
CS
SEa
\ ......
TO NEXT UNiT
OR TERMINATOR
Ali P!I
AlP814
78
5A
SIG BUS IN B5 12 4 ,
POWER SEO PICK IN
L........_ "------v\r-,
---DATA CA8LE-IA
SIG BUS IN BO 12 7 ,
'd'
N
AZ
WRITE/iliAD DATA
SIG BUS IN B2 12!1,
AN
AT
12PC02
SIG BUS IN B4 12',
AU
DIIIVE SEL IN BI 12 1 ,
AX
TAG VALID IN
SIG BUS IN BI 12 8 ,
AP
AU
AN
AT
AZP002
M£TERING IN A
AP
TO NEXT UNIT
OR TERMINATOR
A5 PI
CK
CP
CC
CH
CJ
CN
83313100
A
'
SECTION 5
WIRE LISTS
c
INTRODUCTION
Wire lists are divided into two basic categories; wire wrap wire lists and non-logic
wire lists.
WIRE WRAP WIRE LISTS
Wire wrap wire lists provide wire origin/
destination information for the logic back
panel and the R/W pin and guide assembly.
Wires are referenced by logic term origin.
The signal name is decoded as follows:
originate at some point other than a logic
term (switch, bus,test point, etc.).
Z level denotes the vertical position of a
wire on a pin relative to the wire wrap
board. Two vertical positions are possible.
A numeral 1 in this column indicates the
wire is closest to the wire wrap board. A
numeral 2 indicates the .wire is farthest
from the wire wrap board. Both ends of a
wire are always at the. same Z level.
NON· LOGIC WIRE LISTS
Non-Logic wire lists provide wire origin/
destination information for harness assemblies ~nd vari6uspaneis.
The number identification is used to sequence the wire list and provide engineering
reference for change order activity.
A2808; is the logic term of the
inverter, multiplexer, op-arnp,etc.,
found in the logic diagrams.
2; denotes the various outputs of
the same logic term.
00;
indicates daisy chain order of
wires that go to various destinations from a single logic term.
Signal names that begin with a numeral, are
miscellaneous wires. These wires generally
83313100
A
Wire color coding is as follows:
0 - Black
1 - Brown
-2 - Red
3 - Orange
4 - Yellow
5 - Green
6 - Blue
7 - Violet
8 - Gray
9 - White
In multi-digit color codes, the first digit
denotes base color and the remaining digits
denote tracer colors.
5-1
I
TITLE
LOGIC WIRE WRAP (REF:
LINE
NO.
SIGNAL NAME
OR NUMBER'
IDENTIF ICATION
760~3508)
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
REV.
1 OF 68
I
H
WIRE
Z
~OLOR LEVEL
1
500007
00
A0202A
JA8208A
1
2
400001
OOPKSW
A0202B
JA8110B
1
3
400021
OOHDLD
A0203A
JA8112A
1
4
400011
OOBCYC
A0203B
JA8110A
1
5
300031
00
AO?OL...A
JA8002B
1
6
1000Rl
001TKL
A0204B
JA8002A
1
7
108071
00
A0208A
A1209A
1
8
M08001
00
A0208B
A0510A
2
9
M08001
00
A0208B
D2009B
1
10
105051
01
A0209A
A0512B
2
11
105051
00
A0209A
D2007A
1
12
M05051
00
A0209B
A1208A
1
13
105021
02
A0210A
D2207A
2
I
14
105021
00
A0210A
B1004A
1
15
MOS021
00
A0210B
A120RB
1
16
M05011
02
A0211A
A0505B
2
17
M05011
00
A0211A
A1209B
1
18
105011
01
A0211B
C2302A
2
19
105011
02
A0211B
B1301B
1
20
M12001
00
A0212A
C1809B
1
21
112281
00
A0212B
D0802B
1
22
M05061
00
A0213A
A1205B
1
23
300211
00
A0401A
JAR014A
1
24
100011
01
AOL...O 1A
A0611B
2
25
100011
00
A0403A
JA8004B
1
26
300201
00
A0403B
JA8014B
1
27
ROOOL...O
00
A0404A
A2016A
2
28
800040
01
A0404A
JA8203A
1
29
500002
00
A0404B
JA8209A
1
30
105071
01
A0408A
AOC;Of.A
2
31
105071
00
A0408A
C1604B
1
32
105081
00
A0409A
A0612B
1
33
M05081
00
A0409B
D1908A
1
34
105091
00
A0410A
A1206A
1
K¢R-OS42
5-2
83313100
C
TITLE
IL
LOGIC WIRE WRAP
(
SIGNAL NAME
OR NUMBER
IOENTIF ICATION
LINE
NO.
"
ORIGIN
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
2
WIRE
REV.
H
Z
~OLOR LEVEL
1
M05091
00
A0410B
D2012B
1
2
MOS001
00
A041lA
. AO'l01A
1
3
X73011
00
A0414B
A0513B
1
4
173051
00
AOS02B
A0504B
1
5
MOS001 ·00
AOS03A
A0411A
1
6
X08011
01
A0503B
B1207B
2
7
108161
01
A0504A
B1208A
]
8
173051
00
A0504B
AOS02B
1
9
MOS011
02
A0505B
A0211A
2
10
105071
01
A0506A
A0408A
2
11
107011
01
A0506B
A2804B
2
12
M05051
01
A0507A
A1207B
1
13
MOS051
02
A0507A
A0512A
2
14
173021
00
A0509A
A0511B
1
15
M'IXIH
00
AOC;lOA
AO?ORR
?
16
173021
00
A0511B
A0509A
1
17
M05051
02
A0512A
A0507A
2
18
105051
01
A0512B
A0209A
2
19
X73001
00
A0513A
A0514B
1
20
X73011
00
A0513B
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TITLE
LOGIC WIRE WRAP (REF: 76033500)
LINE
NO.
SIGNAL NAME
OR NUMBER
IDENTIF ICATION
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IL
DOCUMENT NO. SHEET NO.
HPDE 7335
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ORIGIN
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5-5
TITLE
LOGIC WIRE WRAP (REF: 76033500) .
LINE
NO.
SIGNAL NAME
OR NUMBER
IDENTIFICATION
2
123121
123121
W24012
3
1
ORIGIN
00
IL
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OR NUMBER
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LINE
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ORIGIN
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HPDE 7335
DESTINATION
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TITLE
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LINE
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SIGNAL NAME
OR NUMBER
IDENTIF ICATION
ORIGIN
IL
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TITLE
LOGIC WIRE WRAP (REF: 76033500)
SIGNAL NAME
OR NUMBER
IDENTIFICATION
LINE
NO.
o
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
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83313100
A
5-9
TITLE
LOGIC WIRE WRAP (REF: 76033500)
LINE
NO.
SIGNAL NAME
OR NUMBER
IDENTIF .CATION
1
14B061
2
04
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
9
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l
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83313100
A
TITLE
LOGIC WIRE WRAP (REF: 76033500)
SIGNAL NAME
OR NUMBER
I DENTIF ICATION
LINE
NO.
ORIGIN
IL
DOCUMENT NO. SHEET NO.
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DESTINATION
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1
20
W22001
00
A1817B
A1912A
1
21
200191
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A1901A
A1906B
1
22
123161
00
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23
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00
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1
A190BA
A0911A
1
32
33
123131
3A
123181
00
K¢R-0542
83313100
A
5-11
TITLE
LOGIC WIRE WRAP (REF:
LINE
NO.
SIGNAL NAME
OR NUMBER
I DENTIF .CATION
7"n~~"nn)
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
11
REV.
A
WIRE
Z
!cOLOR LEVEL
1
123171
00
A1908B
A0910A
1
2
W22003
00
A1909A
A1815B
1
3
W22004
00
A1909B
. B1801B
1
4
W22013
00
A1910A·
B1804B
1
5
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00
A1910B
B1806B
1
6
W22011
00
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1
7
W22012
00
A1911B
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1
8
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01
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B2313A
2
9
W22001
00
A1912A
A1817B
1
10
W22002
00
A1912B
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1
11
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00
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1
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2
20
160071 M
A?On~A
~
1
21
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1
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1
34
I14041
03
A2006B
A181lA
2
i
,----..
\
..........
K¢R-OS.(2
5-12
83313100
A
TITLE
LOGIC WIRE WRAP (REF: 76033500)
/'
"
~"-'
r~'-'"
U
SIGNAL NAME
OR NUMBER
IDENTIFICATION
LINE
NO.
ORIGIN
WL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
12
A
WIRE
Z
~OLOR LEVEL
1
162041
00
A2007A
C201
~B
1
2
162041
01
A2007A
C0208B
2
3
114051
03
A2007B
A1813A
1
4
114051
04
A2007B'
A1314A
2
5
162111
00
A2008A
D2001A
1
6
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01
A200BA
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2
7
114061
02
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1
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9
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1
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13
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01
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2
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00
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1
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01
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1
16
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1
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2
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00
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1
19
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01
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Blll2A
2
20
109181
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2
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00
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2
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1
34
125041
00
A2110B
BII07B
1
A
REV.
k¢R-0542 ,
83313100
A
5-13
TITLE
LOGIC WIRE
WRAP
SIGNAL NAME
OR NUMBER
IDENTIFICATION
LINE
NO.
(REF: 76033500)
ORIGIN
WL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
13
A
WIRE
l
~OLOR LEVEL
1
125041
02
A2110B
B1304B
2
2
K25012
00
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2
3
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1
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2
..
REV.
K{2SR.05~2
5-14
83313100 A
c
TITLE
LOGIC WIRE WRAP (REF: 76033500)
SIGNAL NAME
OR NUMBER
IDENTIFICATION
LINE
NO.
o
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
,
14
DESTINATION
WIRE
Z
132021
00
A2213B
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1
2
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00
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00
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2
20
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1
A
A
~OLOR LEVEL
1
83313100
REV.
K~R.0542
5-15
TITLE
LINE
NO.
LOGIC WIRE WRAP (REF: 16033500)
SIGNAL NAME
OR NUMBER
ORIGIN
IDENTIF ICATION
IL
DOCUMENT NO. SHEET NO.
HPDE 1335
DESTINATION
15
WIRE
~OLOR
Z
W24011
00
A2312A
B2B12B
2
2
W24011
01
A2312A
A0909A
1
3
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'. B2B10B
2
4
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1
5
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00
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00
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8
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1
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00
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1
11
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00
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1
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2
13
124121
00
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1
14
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00
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1
15
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01
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2
16
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01
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1
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00
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18
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00
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01
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20
129151
00
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1
21
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01
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2
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2
5-16
A
LEVEL
1
00
REV.
c
K~R-0542
83313100
A
TITLE
LOGIC WIRE WRAP (REF: 76033500)
SIGNAL NAME
OR NUMBER
I DENTIF ICATION
LINE
NO.
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE7335
DESTINATION
16
A
WIRE
Z
COLOR LEVEL
1
K32001
00
A2413A
C1B15B
2
2
I06151
00
A2413B
C1513B
1
3
K32002
00
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1
4
132151
02
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1
5
119241
00
A2416A
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1
6
200001
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1
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00
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1
8
134091
00
A2417B
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1
9
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01
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2
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2
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1
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2
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00
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02
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1
OR
REV.
2
KQ5R-OS .. 2
83313100
A
5-17
TITLE
LOGIC WIRE WRAP (REF: 76033500)
LINE
NO.
SIGNAL NAME
OR NUMBER
IDENTIF ICATION
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
REV.
A
17
WIRE
Z
COLOR LEVEL
1
K50031
03
A2517B
B0912B
2
2
A25031
00
A2607B
A2109B
1
3
A26061
00
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1
4
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01
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B0911B
2
5
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00
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1
6
120051
00
A2617B
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1
7
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00
A2702A
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1
8
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00
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1
9
127241
00
A2703B
B2B05A
2
10
127231
00
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1
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1
12
127271
00
A2705A
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1
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127261
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1
16
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00
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1
17
119121
00
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1
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2
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2
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\
r---~
I
\.............
18
K¢R.0542
5-1B
83313100
A
TITLE
IL
LOGIC WIRE WRAP
SIGNAL NAME
OR NUMBER
IDENTIFICATION·
LINE
NO.
ORIGIN
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
18
119221
04
A2083B
C1812B
1
2
141261
02
A2804A
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1
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1
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02
6
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2
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00
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1
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1
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139081
139141
139031
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500009
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1
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1
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1
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1
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2
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1
17
I50001
00
B0804A
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1
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B0804B
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1
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00
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00
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1
25
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00
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,
26
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B0808B
D2010A
1
27
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00
B0810A
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1
28
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1
29
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,
30
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ill)
B0902B
C":,t...04A
1
31
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00
B0903A
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1
32
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00
B0903B
AII03B .
1
33
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00
B0904A
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1
34
K18002
00
B0904B
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1
13
. A2812A
I
2
K28002
12
H
WIRE
Z
¢OLOR LEVEL
1
5
REV.
1
II
K¢R-0542
83313100
c
5-19
TITLE
LOGIC WIRE WRAP (REF: 76033500)
LINE
NO.
SIGNAL NAME
OR NUMBER.
IDENTIF .CATION
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
19
REV.
A
WIRE
Z
COLOR LEVEL
1
K18031
00
B0905A
C1013B
1
2
121161
00
B0905B
D1909B
1
3
K40011
03
B0906A
C1516B
1
4
K40011
02
B0906A
B1309A
2
5
121151
01
B0906B
A1808B
2
6
121151
02
B0906B
C1517A
1
7
141181
02
B0907A
B1302A
2
8
200601
OOGND
B0907B
B0914A
1
9
141261
00
B0908A
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1
10
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01
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B2.10flA
2
11
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00
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B2410B
1
12
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00
B0909B
ROROflR
1
13
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00
B0910A
A10'03A
1
14
148061
01
B0910B
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2
15
148061
02
B0910B
B1212B
1
16
126051
00
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1
17
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01
B0911B
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2
18
150241
00
B0912A
A2203B·
1
19
K50031
03
B0912B
A2517B
2
20
150221
00
B0913A
B0804B
1
21
150181
00
B0913B
B2406B
1
22
200601
OOGND
B0914A
B0907B
1
23
X32021
00
B1003B
B2404A
1
24
lOtiO?'
00
B1004A
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01
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2
28
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2
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1
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00
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1
31
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01
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2
32
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03
B1011B
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1
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......
'
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I
\'........ ,.'
5-20
K¢R-0542
83313100
A
TITLE
IL
LOGIC WIRE WRAP
SIGNAL NAME
OR NUMBER
IDENTIFICATION
LINE
NO.
ORIGIN
DOCUMENT NO. SHEET NO.
HPDE 7334
DESTINATION
20
REV.
H
WIRE
Z
~OLOR LEVEL
1
125041
00
B1107B
A2110B
1
2
125041
01
B1107B
B1011B
2
3
129151
03
B1109B
C2003B
1
4
K34001
00
B1110B
A11116B
1
5
K33011
01
B1111A
B2407B
2
6
K33011
00
B111lA
B1008B
1
7
K25001
01
B1111B
B1307B
2
8
K25001
00
B1111B
A2112B
1
9
X34012
00
B1112A
C1416B
1
10
X34012
01
B1112A
A2012A
2
11
112241
05
B1201A
D0804A
2
12
K18052
00
B1201B
D1007B
1
13
K18052
01
B1201B
A1404B
2
14
106061
00
B1202A
C2111B
1
15
109381
07
B1202B
C0203A
2
16
109381
06
B1202B
C0208A
1
17
109101
00
B1203B
D0802A
1
18
172131
00
B1204A
C0205B
1
19
I5505
B1204B
B1205A
2
20
I5505
B1204B
B1206B
1
21
I5505
B1205A
B1204B
2
22
I5504
B1205B
B1310B
1
23
Z08001
01
B1206A
C2111A
2
24
Z08001
00
B1206A
R?L..ORR
1
25
108151
00
B120hR
R110?R
1
26
200021
00
B1207A
JA8109B
1
27
X08011
01
B1207B
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2
28
X08011
00
B1207B
JA8109A
1
29
108161
01
B1208A
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1
30
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1
31
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1
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1
33
141111
00
B1210B
A1316B
1
34
141111
01
B1210B
D2207B
2
K¢R-0542
83313100
C
5-21
TITLE
"
IL
LOGIC WIRE WRAP
LINE
NO.
SIGNAL NAME
OR NUMBER
IDENTIFICATION'
ORIGIN
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
21
REV.
H
WIRE
2
COLOR LEVEL
1
IlhlRl
02
B1211A
D081ZA
1
2
I16181
01
B1211A
C1215B
2
3
I43221
00
B1211B
C1515A
1
4
I43181
00'
B121ZA
A1009A
1
5
148061
02
B1212B
B0910B
1
6
148061
03
B1212B
C1512B
2
7
123131
B1213A
D1502B
1
8
I48071
00
B1213B
B2003A
1
9'
200701
OOGND
B1214A
A1214B
1
10
I41191
00
B1301A
A2203A
1
11
I05011
02
B1301B
A0211B
1
12
141181
00
B130ZA
B2403B
1
13
I41181
02
B130ZA
B0907A
2
14
I08151
00
B1302B
B1206B
1
15
141201
00
B1303A
A1011B
1
16
105021
01
B1303B
B1004A
2
17
I41211
00
B1304A
B2510B
1
18
125041
02
B1304B
A2110B
2
19
141001
00
B1305A
C0707B
1
20
A28051
00
B1306A
D2309A
1
21
A26051
00
B1306B
B2609B
1
22
141231
00
B1307A
B2203A
1
23
K25001
01
B1307B
Rllll R
?
24
I20021
01
B1308A
BI005A
2
25
I20021
00
B1308A
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1
27
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2
28
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01
B1309B
A2211B
2
29
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01
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?
30
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1
31
I41141
00
B1311A
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1
32
A26071
00
B131ZA
C2002A
1
33
A28011
00
B1312B
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2
34
A28011
01
B1312B
B2502B
1
26
I
5-22
('
K¢R.0542
83313100
c
TITLE
LOGIC WIRE WRAP
SIGNAL NAME
OR NUMBER
IDENTIFICATION
LINE
NO.
(REF: 76033500)
ORIGIN
IL
DOCUMENT NO. SHEET NO.
HPDE 7335
DESTINATION
22
REV.
A
WIRE
Z
k;OLOR LEVEL
1
A2B041
00
B1313A
C2114B
1
2
107191
20
B1401A
B1402B
1
3
107191
21
B140lA
CI006A
2
4
106201
07
B1401B
D0210B
2
5
10El201
' OR
R1401 B
A141?A
1
6
112241
01
B140ZA
CI00ZA'
2
7
112241
00
B140ZA
DOB04A
1
8
1071
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