Hp 16500B Users Manual 16500B/16501A Logic Analysis System Service Guide

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Title & Document Type: 16500B/16501A Logic Analysis System Service Guide
Manual Part Number: 16500-97011
Revision Date: August 1994

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This manual may contain references to HP or Hewlett-Packard. Please note that HewlettPackard's former test and measurement, semiconductor products and chemical analysis
businesses are now part of Agilent Technologies. We have made no changes to this
manual copy. The HP XXXX referred to in this document is now the Agilent XXXX.
For example, model number HP8648A is now model number Agilent 8648A.
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Service Guide

Publication number 16500-97011
First edition, August 1994

For Safety information, Warranties, and Regulatory
information, see the pages at the end of the book.
 Copyright Hewlett-Packard Company 1987 – 1994
All Rights Reserved.

HP 16500B/16501A
Logic Analysis System

HP 16500B/16501A Logic Analysis System
The HP 16500B is the mainframe of the Logic Analysis System, and the HP 16501A is
the expansion frame. The HP 16500B/16501A is of modular structure using plug-in
cards with a wide range of data acquisition and stimulus capabilities.

Features
Some of the main features of the HP 16500B/16501A are as follows:

•
•
•
•
•
•
•
•

Modular mainframe with five card slots
Expansion frame, which expands the total system card slots to ten
Touchscreen user interface
86 Mbyte hard disk drive
High-density 3.5-inch flexible disk drive
Color monitor
Intermodule triggering and time correlation of acquired data
HP-IB, RS-232C or optional LAN interfaces for hardcopy output to a printer or
controller interface

Service Strategy
The service strategy for this instrument is the replacement of defective assemblies.
This service guide contains information for finding a defective assembly by testing
and servicing the HP 16500B/16501A.
This instrument can be returned to Hewlett-Packard for all service work, including
troubleshooting. Contact your nearest Hewlett-Packard Sales Office for more details.

The HP 16500B Logic Analysis System

iii

In This Book

This book is the service guide for the HP 16500B/16501A Logic Analysis System and is divided
into eight chapters.
Chapter 1 contains information about the instrument and includes accessories for the
instrument, specifications and characteristics of the instrument, and a list of the equipment
required for servicing the instrument.
Chapter 2 tells how to prepare the instrument for use.
Chapter 3 gives instructions on how to test the performance of the instrument.
Chapter 4 contains calibration instructions for the instrument.
Chapter 5 contains self-tests and flowcharts for troubleshooting the instrument.
Chapter 6 tells how to replace the instrument and assemblies of the instrument, and how to
return them to Hewlett-Packard.
Chapter 7 lists replaceable parts, shows an exploded view, and gives ordering information.
Chapter 8 explains how the instrument works and what the self-tests are checking.
This book also contains information about the HP 16500L interface module when using an
expansion frame or an external monitor. For information about using the interface module
with a local area network, refer to the manuals for the HP 16500L.

Contents

1 General Information
Accessories 1–2
Specifications 1–3
Characteristics 1–3
Recommended Test Equipment 1–6

2 Preparing for Use
To inspect the logic analysis system 2–2
To apply power 2–3
To operate the user interface 2–3
To set the line voltage 2–4
To degauss the display 2–5
To clean the logic analysis system 2–5
To test the logic analysis system 2–5
To install modules 2–6
To install the HP 16500L interface module 2–7
To connect the HP 16501A Expansion Frame 2–9
To connect an external monitor 2–10

3 Testing Performance
To perform the power-up tests 3–3
To perform the self-tests 3–4

4 Calibrating and Adjusting
To prepare the instrument 4–3
To access the test patterns 4–4
To adjust geometry 4–5
To adjust focus, landing, and convergence 4–6
To adjust white balance 4–13

5 Troubleshooting
To use the flowcharts 5–2
To check the power-up self-tests 5–18
To run the self-tests 5–19
To check the video signals 5–22
To check the power supply LEDs 5–23
To check the power supply voltages 5–24
To test the flexible disk drive voltages 5–25
To test the hard disk drive voltages 5–27
To test the expansion frame interface 5–29

Contents

6 Replacing Assemblies
To remove and replace the
Optional modules or filler panels 6–3
Covers 6–4
Flexible disk drive 6–5
Power supply 6–6
Rear fan 6–8
Side fan 6–9
HP 16500L interface module 6–10
Hard disk drive 6–12
Microprocessor board (CPU) 6–13
SIMM memory 6–14
Expansion interface board 6–15
Mother board 6–16
Front-panel board 6–18
Color display assembly 6–19
To return assemblies 6–22

7 Replaceable Parts
Replaceable Parts Ordering 7–2
Replaceable Parts List Description 7–3
HP 16500B Exploded View and Replaceable Parts 7–4
HP 16501A Exploded View and Replaceable Parts 7–9

8 Theory of Operation
Block-Level Theory 8–3
The HP 16500B Logic Analysis System 8–3
The Microprocessor Board 8–6

The Power-Up Routine 8–9
The Power-Up Screen 8–9
Power-Up Self-Tests 8–10
Power-Up Tasks 8–10
The System Configuration Menu 8–12

Self-Tests Description 8–13
Power-Up Self-Tests 8–13
Functional Performance Verification Tests 8–15

HP-IB 8–18
RS-232C 8–19

Accessories 1–2
Specifications 1–3
Characteristics 1–3
Recommended Test Equipment 1–6

General Information

This chapter lists the accessories, the specifications and characteristics, and the
recommended test equipment.

Accessories
The following accessories are supplied with the HP 16500B/16501A Logic Analysis System.
Accessories Supplied

Qty

Training Kit

Setting Up The System Guide

User’s Reference

Programming Reference

Service Guide

RS-232C Loopback Connector

Power cord

Disk pouch containing backup composite software

Feeling Comfortable With Logic Analyzers

Feeling Comfortable with Digitizing Oscilloscopes

Filler Panels

Quantity depends on how many modules are
ordered with the HP 16500B/16501A

Accessories Available
Other accessories available for the HP 16500B/16501A Logic Analysis System are listed in the
Accessories for HP Logic Analyzers brochure.

1–2

General Information
Specifications

Specifications
The specifications are the performance standards against which the product is tested. There
are no specifications for the HP 16500B or the HP 16501A.

Characteristics
These characteristics are not specifications, but are included as additional information. The
following characteristics are typical for the HP 16500B/16501A system.

Hard Disk Drive

Capacity 86 Mbyte unformatted; Formatted as a Microsoft DOS disk drive IDE Interface
Bus.

Flexible Disk Drive

Capacity 1.44 Mbyte formatted Microsoft DOS or LIF supported.

Programmability

Instrument settings and operating modes, including automatic measurements, may be
remotely programmed via RS-232C, HP-IB (IEEE-488), or optional HP 16500L (Ethernet).

Hardcopy Output

Printers Supported HP ThinkJet, HP QuietJet, HP LaserJet, HP PaintJet, HP Deskjet,
HP Deskjet C, Epson and Epson-compatible (for example, Epson FX-80) via RS-232C or
HP-IB.
RS-232C Configurations Protocols: XON/XOFF, Hardware; Data bits: 8; Stop bits: 1, 1
1/2, 2; Parity: none, odd, or even; Baud rates: 110, 300, 600, 1200, 2400, 4800, 9600, 19200.
HP-IB Interface Functions SH1, AH1, T5, TE0, L3, LE0, SR1, RL1, PP1, DC1, DT1, C0
and E2.

Input/Output
Rear Panel BNCs:

Port-in User selectable: TTL, ECL or user defined; Zin = 4 kΩ ; Maximum Vin = -6.0 V at
1.5 mA to +6 V at 1.6 mA.
Port-out Output signal is active high, TTL output level, high > 2 V into 50 Ω, low < 0.4 V
into 50 Ω.

Intermodule Bus (IMB) Run Control Oscilloscope, timing, state, and pattern generation can be armed by Group
Characteristics
Run. Modules can run concurrently or be armed in series. Each module can arm one or
more modules.
Mixed Display Mode Any timing or oscilloscope waveform displays can be mixed.
State listings can be included with waveforms in the State/Timing Mixed Mode display.
Acquiring Data for Mixed Displays To obtain a mixed display, multiple modules must
be armed through the IMB. To include state listings in mixed mode displays, state time
tagging must be on.

1–3

General Information
Characteristics

Time Interval Accuracy Between Modules Equals the sum of the channel-to-channel
time interval accuracies of each module used in the measurement, for a deskewed
measurement.
Time Correlation Resolution 2 ns (500 MHz).
Operating
Environment

Temperature
Instrument 0 °C to 50 °C (+32 °F to 122 °F).
Disk Media 10 °C to 40 °C (+50 °F to 104 °F).
Probes and Cables 0 °C to 65 °C (+32 °F to 149 °F).
Humidity
Instrument up to 95% relative humidity at 40 °C (104 °F).
Disk media and hard drive 8% to 80% relative humidity at 40 °C (104 °F).
Altitude Up to 4600 m (15 000 ft). Hard drive to 300 m (10,000 ft.).
Vibration
Operating Random vibration 5-500Hz, 10 minutes per axis, ~ 2.41 g (rms).
Non-operating Random vibration 5-500Hz, 10 minutes per axis, ~ 2.4 g (rms); and
swept sine resonant search, 5-500Hz, 0.75g (0-peak), 5 minute dwell at 4 resonances
per axis.

Weight

HP 16500B
Net 18.1 kg (40 lbs) + [0.7 kg (1.6 lbs) x number of optional cards installed].
Shipping 25.9 kg (57 lbs) + [3.6 kg (8 lbs) x number of optional cards installed].
HP 16501A
Net 12.2 kg (27 lbs) + [0.7 kg (1.6 lbs) x number of optional cards installed].
Shipping 19.9 kg (44 lbs) + [3.6 kg (8 lbs) x number of optional cards installed].

Power Requirements

HP 16500B 115 V/230 V, -22% to +10%, 48 to 66 Hz, 475 W max.
HP 16501A 115 V/230 V, -22% to +10%, 48 to 66 Hz, 420 W max.

1–4

General Information
Characteristics

Dimensions

Refer to the following figure for dimensional detail.

Dimensional Detail

1–5

General Information
Recommended Test Equipment

Recommended Test Equipment

Equipment Required
Equipment

Critical Specifications

Oscilloscope
Voltmeter
RS-232C Loopback
Connector

100 MHz Bandwidth

*A = Adjustment

1–6

P = Performance Tests

T = Troubleshooting

Recommended
Model/Part
HP 54600A
HP 3478A
HP Part Number
01650-63202

Use*
T
T
T

To inspect the logic analysis system 2–2
To apply power 2–3
To operate the user interface 2–3
To set the line voltage 2–4
To degauss the display 2–5
To clean the logic analysis system 2–5
To test the logic analysis system 2–5
To install modules 2–6
To install the HP 16500L interface module 2–7
To connect the HP 16501A Expansion Frame 2–9
To connect an external monitor 2–10

Preparing for Use

Preparing For Use

This chapter gives you instructions for preparing the logic analysis system for use.

Power Requirements
The logic analysis system mainframe requires a power source of either 115 Vac or 230
Vac, –22 % to +10 %, single phase, 48 to 66 Hz, 475 W maximum power.
The logic analysis system expansion frame requires a power source of either 115 Vac
or 230 Vac, –22 % to +10 %, single phase, 48 to 66 Hz, 420 W maximum power.

Operating Environment
The operating environment is listed in chapter 1. Note the noncondensing humidity
limitation. Condensation within the instrument can cause poor operation or
malfunction. Provide protection against internal condensation.
The logic analysis system will operate at all specifications within the temperature and
humidity range given in chapter 1. However, reliability is enhanced when operating it
within the following ranges:

• Temperature: +20 °C to +35 °C (+68 °F to +95 °F)
• Humidity: 20% to 80% noncondensing
Storage
Store or ship the logic analysis system in environments within the following limits:

• Temperature: -40 °C to + 75 °C
• Humidity: Up to 90% at 65 °C
• Altitude: Up to 15,300 meters (50,000 feet)
Protect the system from temperature extremes which cause condensation on the
instrument.

To inspect the logic analysis system
1 Inspect the shipping container for damage.
If the shipping container or cushioning material is damaged, keep them until you have
checked the contents of the shipment and checked the instrument mechanically and
electrically.
WARNING

Hazardous voltages exist in this instrument. To avoid electrical shock, do not apply power to
a damaged instrument.

2–2

Preparing for Use
To apply power

2 Check the supplied accessories.
Accessories supplied with the logic analysis system are listed in "Accessories" in chapter 1.
3 Inspect the product for physical damage.
Check the logic analysis system and the supplied accessories for obvious physical or
mechanical defects. If you find any defects, contact your nearest Hewlett-Packard Sales
Office. Arrangements for repair or replacement are made, at Hewlett-Packard’s option,
without waiting for a claim settlement.

To apply power
1 Check that the line voltage selector, located on the rear panel, is on the correct

setting and the correct fuse is installed.
See also, "To set the line voltage" in this chapter.
2 Connect the power cord to the instrument and to the power source.
This instrument is equipped with a three-wire power cable. When connected to an
appropriate ac power outlet, this cable grounds the instrument cabinet. The type of power
cable plug shipped with the instrument depends on the country of destination. Refer to
chapter 7, "Replaceable Parts," for option numbers of available power cables.
3 Turn on the instrument line switch located on the rear panel, then turn on the power

standby switch located on the front panel.

To operate the user interface
• To select a field on the mainframe screen, use the touchscreen.
For more information about the logic analysis system interface, refer to the
HP 16500B/16501A Logic Analysis System User’s Reference.

• To set the HP-IB address or to configure for RS-232C, refer to the
HP 16500B/16501A Logic Analysis System User’s Reference.

2–3

Preparing for Use
To set the line voltage

To set the line voltage
When shipped from HP, the line voltage selector is set and an appropriate fuse is installed for
operating the instrument in the country of destination. To operate the instrument from a
power source other than the one set, perform the following steps.
1 Turn the front panel power switch to the STBY position, then turn the power switch
2
3
4
5

to the Off position. Remove the power cord from the instrument.
Replace the main fuse with a 5 A/250 V fuse for 230 V operation, or a 10 A/125 V fuse
for 115 V operation.
Set the rear panel line select switch for the desired voltage.
Reconnect the power cord, turn on the rear panel power switch, then continue
normal operation.
If your system includes an HP 16501A Expansion Frame, repeat this procedure for it.
The expansion frame has only one power switch, and that switch is located on the rear panel.

Line Voltage Selection

2–4

Preparing for Use
To degauss the display

To degauss the display
• If the mainframe has been subjected to strong magnetic fields, the CRT might
become magnetized and display data might become distorted. To correct this
condition, degauss the CRT with a conventional, external-television-type degaussing
coil.

To clean the logic analysis system
• With the instrument turned off and unplugged, use mild soap and water to clean the
front and cabinet of the system. Harsh soap might damage the water-base paint.

To test the logic analysis system
The logic analysis system does not require calibration or adjustment.

• If you require a test to initially accept the operation, perform the self-tests in
chapter 3, "Testing Performance."
• If the logic analysis system does not operate correctly, go to the beginning of
chapter 5, "Troubleshooting."

2–5

Preparing for Use
To install modules

To install modules
The following steps give general instructions for installing modules into the mainframe or the
expansion frame of the system.
CAUTION

Electrostatic discharge can damage electronic components. Use grounded wriststraps and
mats when performing any service to modules.
1 Turn off the frame power switch, then unplug the power cord. Disconnect any input

or output connections.
2 Plan your module configuration.
Refer to the manuals of individual modules for configuration information.
3 Loosen the thumb screws.
Cards or filler panels below the slots intended for installation do not have to be removed.
Starting from the top, loosen the thumb screws on filler panels and cards that need to be
moved.
4 Starting from the top, pull the cards and filler panels that need to be moved halfway

out.
All multicard modules will be cabled together. To prevent damage to the cables and
connectors, pull these cards out together.
5 Remove the cards and filler panels.
Remove the cards or filler panels that are in the slots intended for the module installation.
Some modules for the logic analysis system require calibration if you move them to a different
slot. Refer to the manuals of individual modules for calibration information.
6 Install the module.
You may need to push all other cards into the card cage, but not completely in, to get them
out of the way for installing the module.
Refer to the manuals of individual modules for cabling information.
7 Slide the complete module into the frame, but not completely in.
Each card is firmly seated and tightened one at a time in step 9.
8 Position all cards and filler panels so that the endplates overlap.
9 Seat the cards and tighten the thumbscrews.
Starting with the bottom card, firmly seat the cards into the backplane connector of the
mainframe. Keep applying pressure to the center of the card endplate while tightening the
thumbscrews finger-tight. Repeat this for all cards and filler panels starting at the bottom and
moving to the top.
CAUTION

For correct air circulation, filler panels must be installed in all unused card slots. Correct air
circulation keeps the instrument from overheating. Keep any extra filler panels for future use.
10 Plug in the system, then turn it on.
When you turn on the power switch, the logic analysis system performs power-up tests. After
the power-up tests are complete, the screen will show your system configuration.

See Also

Service Guides for the individual modules.

2–6

Preparing for Use
To install the HP 16500L interface module

To install the HP 16500L interface module
The HP 16500L interface module is required to connect the HP 16501A Expansion Frame to
the HP 16500B mainframe.
WARNING

CAUTION

Hazardous voltages exist on the power supply, the CRT, and the CRT driver board of the
HP 16500B mainframe. To avoid electrical shock, disconnect the power from the instrument
before performing the following procedures. After disconnecting the power, wait at least six
minutes for the capacitors on the power supply board and the CRT driver board to discharge
before servicing the instrument. However, if the AC LED on the power supply has any
illumination, a significant charge remains on the power supply capacitors.
Electrostatic discharge can damage electronic components. Use grounded wriststraps and
mats when performing any service to this module or to the HP 16500B Logic Analysis System.
For correct orientation of the cables, match the slots on the cable connectors and on the
board connectors.
1 Remove power from the HP 16500B mainframe, then remove the optional modules,

the four rear feet, and the top and bottom covers of the mainframe.
2 Remove the sheetmetal plate on the rear of the mainframe covering the slot where

the HP 16500L interface module will be installed.
With the interface module installed, you will not use the plate. Save the plate to use in case
the interface module is removed.
3 Remove the cable connecting the CRT module to the CPU board.
To release the cable, push the tabs on the board connector to the outside of the connector.
With the interface module installed, you will not use this cable. Save the cable to use in case
the interface module is removed.

If you need more room to replace the CRT cable, you can remove the hard disk drive. Removing
the hard disk is not necessary, but gives you more room for replacing the CRT cable. The hard
disk is connected with four screws.

4 Connect one end of the new 40-pin cable to the CRT module.
Push the cable connector into the board connector until the tabs lock in the cable.
If you removed the hard disk drive, replace it before going to the next step.

2–7

Preparing for Use
To install the HP 16500L interface module

5 Slide the interface module into the mainframe through the slot in the rear panel.
6 Install the screws connecting the interface module to the mainframe.
Two screws through the top of the interface module connect it to the sheetmetal plate, and
four screws through the rear plate of the interface module connect it to the rear panel of the
mainframe.
7 Connect the end of the 40-pin CRT cable to the interface module.
8 Connect the 80-pin cable to the CPU board and to the interface module.
a Slide the 80-pin cable halfway through the rear slot of the card cage between the
interface module and the CPU board.
b Connect the cable to the CPU board.
c Connect the cable to the interface module.
9 Connect the 10-pin cable to the CPU board and to the interface module.
10 Replace the top and bottom covers, the optional modules, and the rear feet of the

mainframe.
11 Turn on the system.
a Connect a power cord to the frame.
b Turn on the line switch located on the rear panel the frame.
c Turn on the power standby switch located on the front panel of the mainframe.
When the power-up tests are complete, the mainframe screen shows "Ethernet" in the
Communications menu.

2–8

Preparing for Use
To connect the HP 16501A Expansion Frame

To connect the HP 16501A Expansion Frame
The HP 16501A Expansion Frame includes an interface cable and requires an HP 16500L
interface module to connect to the HP 16500B mainframe. To install the expansion frame,
you need to install the interface module into the mainframe, then connect the cable from the
module to the expansion frame.
CAUTION

Electrostatic discharge can damage electronic components. Use grounded wriststraps and
mats when performing any service to this card.
1 Turn off the mainframe power switch, then unplug the power cord. Disconnect any

input connections.
2 Verify that the line select switch located on the rear panel of the expansion frame is

in the off position.
3 Install the HP 16500L interface module into the mainframe.
The procedure for installing the HP 16500L is on page 2–7.
4 Connect the interface cable to the expansion frame and to the interface module in

the mainframe.
To ensure correct insertion, the 68-pin "D" connectors on each end of the interface cable are
asymmetric in shape. They only fit into their respective ports on the cards when oriented to
match the shape of the ports.
When connecting the interface cable, you will hear two clicks. Make sure the cable connector
is properly seated into the port by pulling the connector without pressing the release tabs. If
the connector is properly seated, it will remain connected to the port.

5 Turn on the system.
a Connect a power cord to each frame.
b Turn on the line switch located on the rear panel of each frame.
c Turn on the power standby switch located on the front panel of the mainframe.

When the power-up tests are complete, the mainframe screen shows "Master
Frame" in a blue field.

2–9

Preparing for Use
To connect an external monitor

To connect an external monitor
The following tables define the signal available for external monitors at the HP 16500L
connector and pin numbers.
HP 16500L Output Signal For External Monitors
Horizontal deflection (fh)

25.0 kHz

Vertical deflection (fv)

59.95 Hz

Resolution

576 x 368 x dots x lines (WxH)

RGB video

0.714 VP-P, positive

Impedance

75 ohm , analog

External Sync Signal

H TTL, negative 3.2 µS;
W TTL, negative, 120 µS

Connector Pins
Pin number

Signal

Pin number

Signal

Red

6,7,8,10

Ground

Green

Horizontal Sync

Blue

Vertical Sync

1 Connect your monitor to the HP 16500L interface module installed into the

HP 16500B mainframe.
2 If your monitor needs adjusting, follow the manufacturer’s instructions.

Connector for
external monitor

2–10

To perform the power-up tests 3–3
To perform the self-tests 3–4

Testing Performance

To ensure the logic analysis system is operating correctly, you can perform software
tests (self-tests) on the system. Directions for performing the software tests are
given in this chapter.
This chapter normally tells you how to test the performance of the logic analysis
system against the specifications listed in chapter 1. Because there are no
specifications for the HP 16500B/16501A, there are no performance verification tests.

Self-Tests
The self-tests listed in this chapter check the functional operation of the mainframe
and the expansion frame. Self-tests for the optional modules installed in the frames
are listed in the individual module Service Guides.
There are two types of self-tests: self-tests that automatically run at power-up, and
self-tests that you select on the screen. For descriptions of the tests, refer to chapter
8, "Theory of Operation."
Perform the self-tests as an acceptance test when receiving the logic analysis system
or when the logic analysis system is repaired.
If a test fails, refer to chapter 5, "Troubleshooting."

Test Interval
There is no recommended test interval for the HP 16500B mainframe or the
HP 16501A expansion frame. However, each of the HP 16500-series option modules
has performance verification tests and therefore require a periodic verification of
specifications. Refer to the Service Guides of the individual modules for more
information.

The Logic Analysis System Interface
To select a field on the HP 16500B screen, use the touchscreen. For more
information about the logic analysis system interface, refer to the
HP 16500B/16501A Logic Analysis System User’s Reference.

3–2

Testing Performance
To perform the power-up tests

To perform the power-up tests
The logic analysis system automatically performs power-up tests when you apply power to the
instrument. The revision number of the boot ROM shows in the upper-right corner of the
screen during these power-up tests. As each test completes, either "passed" or "failed" prints
on the screen in front of the name of each test.
1 Disconnect all inputs, then insert a formatted disk into the flexible disk drive.
2 Let the instrument warm up for a few minutes, then cycle power by turning off then

turning on the power switch.
If the instrument is not warmed up, the power-up test screen will complete before you can
view the screen.
3 As the tests complete, check if they pass or fail.
The Flexible Disk Test reports No Disk if a disk is not in the disk drive.
If a power-up self-test fails, refer to chapter 5, "Troubleshooting."
Performing Power-Up Self-Tests
passed

ROM Test

passed

RAM Test

passed

Interrupt Test

passed

Display Test

passed

HIL Controller Test

passed

Front-Panel Test

passed

Touchscreen Test

passed

Correlator Test

passed

Hard Disk Test

passed

Flexible Disk Test

Loading Module Files

3–3

Testing Performance
To perform the self-tests

To perform the self-tests
The self-tests verify the correct operation of the logic analysis system. Self-tests can
be performed all at once or one at a time. While testing the performance of the logic
analysis system, run the self-tests all at once.
1 If you just did the power-up self-tests, go to step 2.

If you did not just do the power-up self-tests, disconnect all inputs, then turn on the
power switch. Wait until the power-up tests are complete.
2 In the System Configuration menu, select Configuration, then select Test.

3 Select the box labeled Load Test System.
4 Select Test System, then select Mainframe Test from the pop-up menu.

3–4

Testing Performance
To perform the self-tests

5 Install a formatted disk that is not write protected into the flexible disk drive.

Connect an RS-232C loopback connector onto the RS-232C port.
6 Select All System Tests.
You can run all tests at one time by running All System Tests. To see more details about each
test, you can run each test individually. This step shows how to run all tests at once.
The status of the tests will change from Untested to Passed or Failed. If a test fails, refer to
chapter 5, "Troubleshooting."

The Color Display Test is not normally needed. The screens are primarily used when the
color display assembly requires adjusting. For the adjustment procedure, refer to chapter 4,
"Calibrating and Adjusting."
7 Exit the mainframe tests.
a In the Mainframe Test menu, select Mainframe Test, then select Test System.
b Select Configuration, then select Exit Test in the pop-up menu.
c Select the field close to the center of the screen to exit the test system and to load the
mainframe operating system.
After the operating system is loaded, the System Configuration menu is displayed.

3–5

3–6

To prepare the instrument 4–3
To access the test patterns 4–4
To adjust geometry 4–5
To adjust focus, landing, and convergence 4–6
To adjust white balance 4–13

Calibrating and Adjusting

This chapter normally gives you instructions for calibrating and adjusting the logic
analysis system. Because the HP 16500B/16501A requires no calibration, only
adjustment instructions are included.

Adjustments
The only adjustments to the logic analysis system are adjustments to the color CRT
monitor assembly.
Use the following procedures to adjust the CRT module to compensate for magnetic
influences causing misconvergence.
WARNING

Hazard voltages exist on the power supply, the CRT, and the CRT driver board. To avoid
electrical shock, read and follow the Safety and Warning considerations at the end of this
manual before performing adjustment procedures.

Adjustment Interval
DO NOT PERFORM THESE ADJUSTMENTS AS A PART OF ROUTINE
CALIBRATIONS. The following procedures are provided only for the few extreme
cases where either the earth’s magnetic field or the user’s environment cause an
unusable display due to misconvergence that cannot be corrected by degaussing the
entire CRT screen.
DO NOT perform the procedures in this chapter before first degaussing the CRT
screen using the rear-panel degaussing switch. In extreme cases of magnetism, it
may be necessary to degauss the CRT using a conventional external television-type
degaussing coil.

Adjustment Personnel
It is recommended that these adjustments be performed only by qualified personnel
who are familiar with color CRT convergence procedures.

Equipment Required
The instrument firmware supplies the display patterns necessary for adjustment.
The only tool required is a nonmetallic adjustment tool:

• Sony Part Number 4-367-065-01
• HP Part Number 8710-1355

4–2

Calibrating and Adjusting
To prepare the instrument

To prepare the instrument
1 Remove the rear feet and the covers from the mainframe.
2 Before starting the adjustments, mark the position where the potentiometers are set.
This helps in returning the adjustments to their original positions if it becomes necessary to
restart the procedure.
3 During any of the following CRT adjustments, the CRT module must face west.
4 Use the following chart to guide you with the CRT adjustment procedure.
The following CRT adjustments are broken down into adjustment groups. The adjustment
group sequence must be followed in order because of interaction and dependency. The
adjustment group sequence is shown in the adjustment flow diagram below. There will be
cases where not all of the adjustments groups will be used. For example, if the Geometry
Adjustment Group corrects the problem, this will be the only group used.
Colo
r
CRT
Mod
ule
Adju
stme
nt
Flow
Diag
ram

4–3

Calibrating and Adjusting
To access the test patterns

To access the test patterns
Some procedures on the following pages ask you to access test patterns. This procedure tells
you how to access them and how to exit the test.
1 In the System Configuration menu, touch Configuration, then select Test in the

pop-up menu.
2 Touch the field near the center of the screen to load the Test System.
3 In the Test System Configuration menu, touch Test System, then select Mainframe
Test in the pop-up menu.
The screen displays the Mainframe Test menu.
4 Touch the Color Display Test field to display the first test pattern, which is the

white, cross-hatch pattern.

5 Touch Continue to see the next test pattern.
With every touch of the Continue field, the next test pattern will be displayed. When
Continue is selected from the black raster pattern, the Mainframe Test menu will be displayed.
Notice that the status of the Display field changes to Tested.
6 To exit the test system, touch the Mainframe Test field, then touch the Test System.

Touch Configuration, select test, then touch the field near the center of the screen to
exit the test system.

4–4

Calibrating and Adjusting
To adjust geometry

To adjust geometry
1 Display the white cross-hatch test pattern on the CRT.
From the Color Display Test menu, select the white, cross-hatch pattern.
2 Preset the front panel brightness control, the top of the two controls to the left of

the display, maximum clockwise.
3 Preset the front panel contrast control, the bottom of the two controls to the left of

the display, to the mechanical center.
4 Preset H.SUB SHIFT (RV006) and V.SUB SHIFT (RV008), located on the bottom PC
board, to the mechanical centers.
All of the following adjustment potentiometers are located on the PC board on the left side of
the display.
5 Adjust the display size. Measure with a flexible ruler.

• Adjust H.SIZE (RV504) for a 161 mm (6.34 in.) width.
• Adjust V.HEIGHT (RV50) for a 120.5 mm (4.74 in.) height.
6 Center the pattern.

• Adjust V.CENT (RV510) for vertical centering.
• Adjust H.CENT (RV503) for horizontal centering.
7 Adjust PIN AMP (RV506) to eliminate pincushion distortion in the vertical lines of

the cross-hatch pattern as shown in the next figure.

8 Remove the left, bottom rail of the mainframe.
The left, bottom rail must be removed in order to access the next adjustment.
9 Adjust PIN PHASE (RV505) to eliminate pin phase distortion in the vertical lines of

the cross-hatch pattern as shown in the next figure.

10 Reinstall the bottom rail.
11 Adjust TOP PIN (RV511) so that the top horizontal line is parallel with the center

horizontal line.
12 Adjust BOTTOM PIN (RV512) so that the bottom horizontal line is parallel with the

center horizontal line.

4–5

Calibrating and Adjusting
To adjust focus, landing, and convergence

To adjust focus, landing, and convergence
Once you have started, you will have to do all three of the procedures in this group: the focus,
the landing, and the convergence adjustments.
Initial Preparation
1 Loosen the deflection yoke clamp screw.
2 Remove the rear and side fans.
Refer to chapter 6, "Replacing Assemblies."

Focus Adjustment
Geometry adjustments must be performed before making the focus adjustment.
1 Display the white, cross-hatch test pattern on the display.
From the Color Display Test menu, select the white, cross-hatch pattern.
2 Adjust FOCUS (RV701), located on the rear PC board, for best overall focus.

4–6

Calibrating and Adjusting
To adjust focus, landing, and convergence

Landing Adjustment
1 Turn the front panel BRIGHTNESS control fully clockwise.
2 Degauss the CRT by momentarily pressing the DEGAUSS switch located on the

instrument rear panel.
In some cases, the user’s environment or shipping environment may have caused high levels of
magnetization in the CRT. In this case, to completely degauss the CRT you may need to use a
conventional television-type degaussing coil.

3 Set the purity magnet tabs to the mechanical center. Refer to the next figure.
4 Display a green raster test pattern on the display.
From the Color Display Test menu, select the green raster.
In the next steps, while moving the deflection yoke forward and rearward, rotate the yoke as
necessary to keep the edges of the raster parallel to the sides of the display.
6 Move the deflection yoke rearward until the left edge of the raster turns red and the

right side of the raster turns blue.

Red

Green

Blue

7 Adjust the purity magnets until green is in the center of the raster with red and blue

bands evenly distributed on the sides.

4–7

Calibrating and Adjusting
To adjust focus, landing, and convergence

8 Move the deflection yoke forward until the entire raster is green.
Landing adjustment is easier if the yoke is moved all the way forward and then moved back
until the raster is completely green.
9 Using the Color Purity key, replace the green raster with red and then blue raster,

each time checking for proper landing adjustment (color purity of each).
10 If the landing is not correct in step 9, repeat steps 6 through 9 for the best

compromise.

Purity control
corrects this area

Deflection yoke
position corrects
these areas

11 If the landing is not correct in step 10, readjust purity magnets for best landing of

each color.
12 When the landing adjustment is complete, tighten the deflection yoke clamp screw

just enough to keep the yoke from moving. DO NOT over tighten or you might
damage the CRT.

4–8

Calibrating and Adjusting
To adjust focus, landing, and convergence

Static Convergence
1 Temporarily disconnect the power from the instrument.
2 Remove the PC board shield cover from the rear of the Color CRT Module by prying

evenly on all four sides.
3 Reapply power.
4 Display the white, cross-hatch test pattern on the CRT.
From the Color Display Test menu, select the white, cross-hatch pattern.
5 Preset front panel brightness control, the top of the two controls to the left of the

display, maximum clockwise.
6 Preset front panel contrast control, the bottom of the two controls to the left of the
display, to the mechanical center.
7 Check the four dots which are located around the center intersection of the
cross-hatch pattern for coincidence of the blue, red, and green dots. If the dots are
not coincident, adjust H.STAT (RV703) located on the rear PC board to obtain
horizontal coincidence and V.STAT (RV803) located on the bottom PC board to
obtain vertical coincidence.

V.STAT
Center dot
H.STAT

Due to interaction, the BEAM LANDING will need to be readjusted if either the H.STAT or
V.STAT adjustments are made. Once the BEAM LANDING is re-adjusted, repeat step 7 above
if necessary to obtain the center screen coincidence of the dots.

4–9

Calibrating and Adjusting
To adjust focus, landing, and convergence

Dynamic Convergence
1 Display the white, cross-hatch test pattern on the CRT.
From the Color Display Test menu, select the white, cross-hatch test pattern.
2 Adjust Y BOW (RV805) located on the bottom PC board to eliminate red, green, and

blue bowing at the top and bottom of the center vertical line.

3 Adjust Y CROSS (RV804) located on the bottom PC board to eliminate red, green,

and blue orthogonal misalignment at the top and bottom of the center vertical line.

4–10

Calibrating and Adjusting
To adjust focus, landing, and convergence

4 Adjust V TOP (RV801) and V BOTTOM (RV802) to obtain coincidence of the red,

blue, and green at the intersection of the top and bottom horizontal lines with the
center vertical line. The VTOP and VBOTTOM adjustments are located on the
bottom PC board. Use the next two figures for V TOP and V BOTTOM respectively.

4–11

Calibrating and Adjusting
To adjust focus, landing, and convergence

5 Adjust H.AMP (RV807) located on the bottom PC board for equal amounts of

misconvergence at the right and left sides of the screen.

6 Adjust H.TILT (RV806) located on the bottom PC board for coincidence of red,

green, and blue at the right and left sides of the screen.

7 If you are finished with the CRT adjustments, replace the fans.

If you need to adjust the white balance, which is the next procedure, you will
replace the fans after completing that procedure.

4–12

Calibrating and Adjusting
To adjust white balance

To adjust white balance
1 Provide a blank display on the CRT.
From the Color Display Test menu, select a blank (colorless) raster.
2 Preset the front panel brightness and contrast controls to their mechanical centers.
3 On the bottom PC board, set the following adjustments to their mechanical centers.

• SUB BRT (RV901)
• SUB CONT (RV902)
4 On the bottom PC board, set the following adjustments to their mechanical centers.

• G. DRIVE (RV921)
• B. DRIVE (RV931)
• R. DRIVE (RV911)
5 On the rear PC board, set the following adjustments fully counterclockwise.

• G. BKG (RV721)
• B. BKG (RV731)
• R. BKG (RV711)
6 Adjust the SCREEN (RV702) located on the rear PC board until either the red, green,

7
8
9
10

or blue raster just starts to become visible. Note which color becomes visible first
and do not adjust the background control (BKG) for that color in the next step.
Adjust the other two background controls for the best white balance.
From the Color Display Test menu, select the white raster test pattern.
Set the front panel brightness control to maximum.
On the bottom PC board, adjust the DRIVE controls (RV921, RV931 and RV911) for
the best white balance.
For a white balance reference, use an average piece of white photocopy paper and compare
the white on the CRT to the paper.

11 Repeat steps 1-3 followed by 6-10 until satisfied with the white balance.
Essentially, from this point the procedure is as follows:
a With a blank screen, the front panel brightness set to center, and SCREEN (RV702) set
for minimum background, adjust the BKG controls (G.-RV721, B.-RV731, and
R.-RV711) for the best white balance.
b With a white raster and the front panel brightness set to maximum, adjust the DRIVE
controls (G.-RV921, B.-RV931, and R.-RV911) for best white balance.
c Repeat until satisfied with the white balance.
12 Replace the side and rear fans.
Refer to chapter 6, "Replacing Assemblies."

4–13

4–14

To use the flowcharts 5–2
To check the power-up self-tests 5–18
To run the self-tests 5–19
To check the video signals 5–22
To check the power supply LEDs 5–23
To test the power supply voltages 5–24
To test the flexible disk drive voltages 5–25
To test the hard disk drive voltages 5–27
To test the expansion frame interface 5–29

Troubleshooting

This chapter helps you troubleshoot the logic analysis system to find defective
assemblies. The troubleshooting consists of flowcharts, self-test instructions, and
tests. This information is not intended for component-level repair.
If you suspect a problem, start at the top of the first flowchart. During the
troubleshooting instructions, the flowcharts will direct you to perform other tests.
The other tests are located in this chapter after the flowcharts.
The service strategy for this instrument is the replacement of defective assemblies.
This instrument can be returned to Hewlett-Packard for all service work, including
troubleshooting. Contact your nearest Hewlett-Packard Sales Office for more details.
CAUTION

Electrostatic discharge can damage electronic components. Use grounded wriststraps and
mats when you perform any service to this instrument or to the cards in it.

To use the flowcharts
Flowcharts are the primary tool used to isolate defective assemblies. The flowcharts refer to
other tests to help isolate the trouble. The circled letters on the charts indicate connections
with the other flowcharts. Start your troubleshooting at the top of the first flowchart.

5–2