Pineapple Technology DTC25U 25 WATT ATSC TRANSCODER User Manual DTC25U
Pineapple Technology, Inc. 25 WATT ATSC TRANSCODER DTC25U
DTC25U User Manual
DTC25U TRANSCODE
R
INSTRUCTION MANUA
L
PINEAPPLE TECHNOLOGY, INC
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual TABLE OF CONTENTS
Section l --- SAFETY NOTICES ………………………………………………………………………
…
2
** READ THIS SECTION BEFORE INSTALLATON *
*
Secton ll --- TRANSCODER SPECIFICATIONS …………………...………………………………
…
3
Section lll --- TRANSCODER INSTALLATION ……………………………………………………… 4
Section lV --- TRANSCODER TURN-ON ……………………………………………………………
…
5
Section V --- THEORY OF OPERATION
A
. Introduction ……………………………………………………………………………
…
8
B. XC100LC Regenerative Transcoder Module and Up Converter……………………
…
8
C. LTX Mainframe Assembly ……………………………………………………………… 9
D. BPUD100 Digital Mask Filter……………………………………………………………
…
9
E. Low Pass Filter (Optional)………………………………………………………………
…
9
SECTION Vl --- SCHEMATIC AND PARTS LISTS
A
. DTC25U………………………………………………………….................................... 10
B. LTX Mainframe Assembly………………………………………………………………
…
12
C. BPUD100Digital Mask Filter……………………………………………………………
…
14
D. Low Pass Filter…………………………………………………………………………… 15
SECTION Vll --- RECOMMENDED ROUTINE MAINTENANCE …………………………………
…
16
SECTION Vlll --- ADJUSTMENTS AND TUNING …………………………………………………… 17
SECTION lX --- PROBLEM SOLVING / TROUBLESHOOTING …………………………………
…
18
SECTION X --- WARRANT
Y
…………………………………………………………………………… 20
Section I
Safety
Notices
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual l --- SAFETY NOTICES
l ---SAFETY NOTICES
** READ THIS SECTION BEFORE INSTALLATION **
SEVERE ELECTRICAL SHOCK OR BURNS MAY OCCU
R
IF THIS EQUIPMENT IS USED IMPROPERLY.
NEVER WORK ON THIS EQUIPMENT ALONE. ALWAYS HAVE ANOTHER PERSON PRESENT
WHILE WORKING ON ELECTRICAL CIRCUITS OR MOVING EQUIPMENT. COMMUNICATIONS
TO EMERGENCY SERVICES SHOULD BE AVAILABLE AT ALL TIMES.
BEFORE CONNECTING THIS EQUIPMENT TO ANY AC ELECTRICAL SOURCE READ THE
SECTION ON INSTALLATION. ALL ELECTRICAL WIRING FOR THIS EQUIPMENT MUST BE
PERFORMED BY QUALIFIED ELECTRICIANS. ALL WIRING MUST BE COMPLIANT WITH
LOCAL ELECTRICAL CODES.
POWER AMPLIFIERS AND SUPPLIES ARE HEAVY. TO INSTALL THIS EQUIPMENT IN RACKS
USE TWO (2) PERSONS TO AVOID POSSIBLE INJURIES.
NEVER OPEN THE CABINET ENCLOSURE OR UNPLUG CABLES OR WIRES WHILE THIS
EQUIPMENT IS OPERATING.
ALL SERVICE WORK MUST BE PERFORMED BY QUALIFIED TECHNICIANS ONLY
.
IF ONE IS NOT AVAILABLE LOCALLY, CONTACT PINEAPPLE TECHNOLOGY, INC. FOR
A LIST IN YOUR AREA.
Page 2
Section II
Transmitter
Specifications
THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual II – TRANSCODER SPECIFICATIONS
II – DTC25U SPECIFICATIONS
Power Output ………………………… 25W Average
RF Output Impedance………………… 50 ohms
Frequency Range……………………… 470 – 806 MHz
Frequency Stability…………………… ± 1,000 Hz
Error Vector Magnitude………………. 4% Maximum
Digital Signal to Noise……………….. 27 dB
Group Delay with Output Filter………. ± 25 ns
Harmonic Output………………............ -50 dB
Spurious Output………………………. -50 dB
Spectrical Mask with Output Filter…... -46 dB @ Channel Edge
-85 dB ± 6 MHz
Ref. channel edge below average transmitted power
(Watts/5.4 MHz)
Phase Noise……………………………. -106 dBc/Hz @ 20 kHz
Operating Temperature……………….. -10 to +35 degrees Celsius Ambient
+14 to +95 degrees Fahrenheit Ambient
Altitude……………………………….. 5,000 ft without additional cooling
Cooling Requirement…………………. Built in, except where noted
Connectors……………………………. F Connector Input, N Connector Output
Power Consumption…………………… 500W maximum
AC Line Voltage……………………… 85 – 120 VAC Single Phase
Weight………………………………… 100 lbs
Dimensions…………………………… 21” x 16” x 24” (W x H x D) Standard
Page 3
Section III
Transmitter
Installation
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual lll -- TRANSCODER INSTALLATION
lll -- TRANSCODER INSTALLATION
To ensure long and reliable trouble-free service from the DTC25U transcoder the following steps
for installation are recommended:
1. MECHANICAL INSTALLATION: The DTC25U Transcoder was designed to be installed in a building
protected from the weather. The building should have a hard-surface floor such as concrete with a
moisture barrier. This barrier could be pressure-treated wood sub flooring which could be anchored
to the concrete and to the transmitter to make the installation earthquake resistant.
A
llow a minimum of three feet around the transmitter cabinet for service access. The top of the
transmitter should be clear for three feet above to allow the air to exhaust from the transmitter.
Provisions for air inlet and exhaust from the room must allow air flow with minimal obstruction.
In the event that the room temperature exceeds 35º Celsius (95º F), cooling air must be provided
so that the room temperature will not exceed 35 degrees Celsius under worse case conditions.
Notice: This equipment is HEAV
Y
and must be handled by professional movers with prope
r
equipment. Any damage caused by the installers is not covered under warranty. Check to ensur
e
that installing crews have proper insurance coverage.
2. GROUNDING: Transmitter grounding is
V
ERY IMPORTANT and must be done correctly fo
r
safety and operational reasons. A typical installation may be done as follows
:
Use a heavy gauge wire such as 16 AWG stranded copper. The bonding between the transmitter
and the ground rods must be good quality and protected from corrosion. The ground wires should
run over the floor and be connected to the ground rods located outside the building. The wire
should not go thru the concrete floor but over and around it.
3. AC WIRING: The DTC25U transcoder comes with a three wire 110 VAC standard plug for
connection to a 110 VAC electrical outlet. It is recommended that the electrical outlet be protected
with its own separate breaker and used only for the transcoder.
NOTICE: All wiring of this type, except for the actual connection to the AC plug, must be done
by a QUALIFIED ELECTRICIAN and must conform to LOCAL and NATIONAL wiring CODES.
Consult with your electrician to ensure that the proper breaker size is selected for the main circuit.
4. ANTENNA CONNECTION: The transcoder is equipped with an N connector for output power to the
transmit antenna and an F connector for connection from the receive antenna.
Page 4
Section IV
Transmitter
Turn-On
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual lV -- TRANSCODER TURN-ON PROCEDURE
lV --- TRANSCODER TURN-ON PROCEDURE (Page 1 of 3
)
See the previous section on installation before proceeding with this section. Improper installation of th
e
transcoder can cause serious damage to the equipment or operating personnel and may voi
d
manufacturers warranty. Initial turn on and check out is very important for the broadcast engineer t
o
learn how to setup and operate the transcoder. Following these steps will ensure long and reliable operation
:
1. Check the transcoder output load or antenna for proper installation and connection to the transcoder
.
2. Inspect the transcoder front and back to check for broken items or lose fitting items. These must
be replaced or properly secured before turning the transcoder on. Pay special attention to all R
F
connectors including transmit coaxial cable and antenna.
3. Check the AC breaker and on/off switches to ensure that all are in the OFF position.
4. Verify the switch on the power strip at the back of the cabinet and the power switch on the front of the
LTX Mainframe are in the OFF position. Plug in the AC power cord to a nearby 110 AC electrica
l
connector with associated, appropriately sized, circuit breaker.
5. Verify the output power level on the Drake Upconverter is set to minimum ( GAIN fully CCW ). See Fig 1
below for location. On the LTX Mainframe verify
X
MTR switch is in STBY.
6. Refer to the transcoder and upconverter instruction manuals in the DTC25U User Manual to locate the key
functions and become familiar with the unit. Insure that all connections, including the DC power
connection and the RF (IF) connection, between the 8VSB Regenerator and Upconverter have been made.
7. Verify, using the front panel display on the transcoder upconverter, that the correct output channel has
been selected. At this time, no connection should be made to the transcoder input at the back of the unit.
Any following measurements will be done using the Null Packets generated inside the transcoder
.
8. Turn-on the switch located on the power strip at the rear of the DTC25U. Note: The Larcan Transcoder
will come on at this time as well as the cabinet fan. A green light indication should be seen on the Drake
Upconverter and, after a few minutes, the two green lights on the transcoder will turn red indicating proper
operation.
9. Locate and turn on the front panel breaker found on the LTX Mainframe and set the
X
MTR switch
to the ON position.
MAKE THE FOLLOWING OBSERVATION
S
METER READINGS TYPICAL
DC SUPPLY VOLTAG
E
32 VDC
PA1 DRIVER CURREN
T
1.7 AMPS ± 20%
PA2 FINAL CURREN
T
2.7 AMPS ± 20%
PA3 FINAL CURREN
T
1.3 AMPS ± 20%
RF OUTPUT POWER 10 TO 50%
RFL'D POWER < 10%
NOTE STATUS LIGHT
S
FAN GREEN
TEMP GREEN
+DC GREEN
THE FAN SHOULD BE MAKING SOME NOIS
E
Page 5
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual lV -- TRANSCODER TURN-ON PROCEDURE
lV --- TRANSCODER TURN-ON PROCEDURE (Page 2 of 3)
Note: Allow the DTC25U to warm up for at least one (1) hour before making the final adjustment.
If transmitter is not warmed up, the output power will require re-adjustment to proper level when it is warm
.
10. Select the FWD Power setting on the rotary switch associated with the front panel meter on the LTX
Mainframe assembly. Slowly adjust the power level setting on the Drake Upconverter while observing the
output power level on the front panel meter until the meter reading indicates 100% output power.
RECORD AND RETAIN THE FOLLOWING OBSERVATIONS FOR FUTURE REVIEW IF NECESSARY
.
METER READINGS TYPICAL
DC SUPPLY VOLTAGE 32 VDC
PA1 DRIVER CURRENT 1.8 AMPS ± 20%
PA2 FINAL CURRENT 3.4 AMPS ± 20%
PA3 FINAL CURRENT 2.8 AMPS ± 20%
RF OUTPUT POWER 90 TO 100%
RFL'D POWER < 10%
NOTE STATUS LIGHTS
FAN GREEN
TEMP GREEN
+DC GREEN
FIG. 1
Page 6
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual lV -- TRANSCODER TURN-ON PROCEDURE
lV --- TRANSCODER TURN-ON PROCEDURE (Page 3 of 3)
11. The receive signal antenna can now be connected to the input of the transcoder as required.
Note: The receive antenna should be located so that it will not pick up the transmitter outpu
t
signal. Even when the input and output channel separation may seem to be considerable
,
the input receiver front end can be over loaded. This will reduce the sensitivity of th
e
receiver resulting in degraded or loss of signal when viewed at the DTC25U transmit out.
Page 7
Section V
Theory
of
Operation
PINEAPPLE TECHNOLOGY, INC.
UTX1K ULTRA Operating and Service Manual V -- THEORY OF OPERATION
V
--- THEORY OF OPERATION (Page 1 of 2)
A
. INTRODUCTION
The DTC25U transcoder was designed to meet or exceed all FCC applicable specifications for
TV broadcast equipment. Special attention was given to the selection of sub-assemblies and components
to achieve maximum reliability and minimum down time. The construction of the DTC25U is
BASIC and MODULAR with most components field replaceable. Special emphasis was placed on
"KEEPING IT SIMPLE" and returning to more traditional transmitter layouts and instrumentation.
Refer to the DTC25U block diagram for an overview of the transmitter architecture. This will
give the technician basic information needed to understand the operation of the transmitter and the function
of each subassembly.
SEE SECTION Vl.A FOR PARTS LIST AND BLOCK DIAGRAM.
B. XC100LC Regenerative Transcoder
B-1 Exciter
Refer to the Larcan user manual for information on the exciter portion of the transcoder.
SEE SECTION VI.B FOR SCHEMATIC AND PARTS LIS
T
B-2. Drake Up Converter
Refer to Drake user manual for information on the operation of this portion of the transcoder.
Page 8
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual V -- THEORY OF OPERATION
V
. THEORY OF OPERATION (CONTINUED) (Page 2 of 2)
C. LTX Mainframe Power Amplifier
Cabinet - The cabinet is constructed of heavy gauge steel and is very durable. This enclosure is
painted black and is resistive to harsh environment. Standard 19 inch rack mounting.
LTX-D1 Mainframe Assembly - Internal sub-assemblies include the following:
1. DC Power Suppl
y
2. RF Deck
3. Status Monitoring (1A0035)
4. Output Power Detector Board (1A0027)
5. Reflected Power Detector (1A0029) and Shutdown Switch
6. Metering and Monitoring Assembly (1A0300
)
For details of this sections above, see appropriate sections in this manual.
D. BPUD100 Digital Mask Filte
r
The FCC Stringent Mask filter supplied with the DTC25U transcoder is designed to completely
satisfy the FCC Rules for a low power TV transmitter and translator.
This is a closed unit and does not require field adjustment.
E. Optional Low Pass Filte
r
This low pass filter is required and will be supplied with DTC25U translators that operate on
Channels 22 - 24, 32 - 36 and 38 for the specific purpose of providing "out of band" protection to
Radio Navigation Satellite Services.
Page 9
Section VI
Schematic
and
Parts List
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
V
l -- SCHEMATICS AND PARTS LIS
T
A. DTC25U Assembly Tree
Item Qty Type P/N Title Detail
Top CAT DTC25U UHF TV TRANSCODER 25 W R
M
LARCAN EXCITTER/CONVERTER
1 1 PS BPUD100 DIGITAL MASK FILTER UHF TV 100 WATTS RMS
2 1 PL LTXMAINFRAME LTX SERIES XMTR 100 W UHF BASIC UNIT
3 1 PS XC100LC TRANSCODER, LARCAN UHF DIGITAL TRANSLATOR
Page 10
SIZE FSCM NO.
SCALE SHEET
DWG NO. REV
Pineapple Technology, Inc.
Rocklin, CA
Mask
Filter
AC Inlet AC Inlet
DC Inlet
RF Input RF Input
RF Output Mon RF Probe
Remote
Interface
DC Out
Larcan
8VSB Regen
Transcoder
Drake
DCU860
Up Conv
LTX-D1
Mainframe
Assembly
Ant
RF In
Optional
Low Pass
Filter
as required
IF
DTC25U
Digital Transcoder
AB
1
1:1
XC100LC
DB9
Page 11
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual
V
l -- SCHEMATICS AND PARTS LIS
T
B. LTX-D1 Mainframe Assembly Tree
Item
Q
t
y
Typ
e P/N Title Detail
Top PL LTXMAINFRA
M
LTX SERIES XMTR 100 W UHF BASIC UNIT
1 1 PS MF9529A LTX HEAT SINK HOLDER AL 090
2 1 PS MF9531A LTX FRONT PANEL 0125 AL W/PAINT AND SILK
3 1 PS MF9532A LTX CHASSIS 090 AL ALODYNE W/REAR SILK
4 1 PS MF9533A LTX AIR DAM DEFLECTOR 050 AL ALODYNE
5 1 PS MF9534A LTX TOP COVER O60 AL ALODYNE
6 1 PL MF9535 LTX100U HEAT SINK STD HEAT SINK W/U250LD FP
7 0 PS MF9536 LTX100 VHF HIGH HEAT SINK STD PTI HS MATERIAL
8 0 PS MF9537 LTX100 VHF LOW BAND HEAT SINK STD PTI HS MATERIAL
9 0 PS MF9538 LTX200U HEAT SINK U250LD MTG WITH DRIVER
10 1 PS PC9515 COUPLER GP COVER TMM3 0125 USE ON ALL -30dB COUPLERS
11 1 PS PC9514 UHF -30 dB COUPLER TMM3 0125 DUAL DIRECTIONAL
12 0 PS PC9513 VHF HB -30 dB COUPLER TMM3015 DUAL DIRECTIONAL
13 0 PS PC9512 VHF LB -30 dB COUPLER TMM30125 DUAL DIRECTIONAL
14 1 PS 660104 LTX MULTI-FUNCTION METER HOYT MODEL 3135 ANALOG MTR
15 1 PS AC3108 CIRCUIT BREAK/ ON/OFF SWITCH 115 VAC 10 A RESETABLE
16 1 PS AC1003 FILTER, AC LINE 110/220 AC PLUG
17 1 PS 990200 FILTER, AIR DRY COMAIR FILTER/GUARD ASS,Y
18 1 PS 851035 FAN AC 115 100 CFM 115 VAC COMAIR-ROTRON MUFFIN XL AC MX2A3
19 1 PS CA5110 CABLE ASSEMBLY 10 WIRE 10 WIRE SOC TO SOC CONNECTOR
20 4 PS 480300 CON 2 PIN HEADER AMP A23837-ND
22 1 PS AC2010 DC POWER SUPPLY 115/220 VAC 320 WATTS 27-31 VDC
23 6 PS INHOUSE_LA
B
PTI LABOR LOADED
24 8 PS INHOUSE-EN
G
ENG TESTING AND FIXIT LOADED
25 1 PL 1A0300 LTX100 METERING CIRCUIT FRONT PANEL ASSEMBLY
26 1 PL 1A0027 PWR MONITOR CK PC9052B CBR
27 1 PL 1A0035 PA STATUS BOARD PC9061H
28 1 PL 1A0026 VSWR/PWR DET BRD PC9051A
29 1 CA
T
DRV10-40 DRIVER AMP WITH ALC CKT PO10W
31 1 PS BPU150N BP FILTER 150 W UHF 470-862 MHz
32 O PS BPVH300N BP FILTER 300W VHF HB CL3NV (M)
N
TYPE N CONNECTORS
33 0 PS BPVL200N BP FILTER LTX XMTR VHF LB TYPE N CONNECTORS 200 W
34 1 PS 990280 FINGER GUARD 6" FINGER GUARD 150MM METAL
35 1 PS 851030 PATRIOT AC FAN 110 V XL100 EXHAUSE FAN
36 1 PS 481501 AURAL FEMALE PNL CONNECTOR XLR TYPE 3 PIN
37 1 PS 481502 AURAL MALE PLUE XLR 3 PIN
38 1 PS 484025 TOGGLE ON/OFF FLAT LVR 2 PIN
39 1 PS 491350
Page 12
SIZE FSCM NO.
SCALE SHEET
DWG NO. REV
Pineapple Technology, Inc.
Rocklin, CA
LTX-D1 Mainframe Assembly
A
1
B
1:1
Directional
Coupler
CAL
CAL
ATT
ATT
R
F
AC Inlet
110 VAC
DC Output
DVR10U
M
+DC
RF IN
PA Fan
PS1
Power
Supply
27VDC 11A
110VAC
ON\OFF
SW
U250LD
M
+DC
RF IN
DC Metering
and
DC Monitoring
1A0300
RF Deck
LTX-D1 Mainframe
110 VAC
RF
DB9
From
RF Output
Monitor Tap
RF
RF Probe
FWD Pwr P1
P2
P3
Gnd P4
Shutdown P5
P6
RFLD Pwr P7
ALC P8
+8 VDC P9
Page 13
SIZE FSCM NO.
SCALE SHEET
DWG NO. REV
Pineapple Technology, Inc.
Rocklin, CA
BPUD100 Stringent Mask Filter
No Serviceable Parts
SECTION VI - SCHEMATIC AND PARTS LISTS
SUB-SECTION C - DTC25U
Page 14
SIZE FSCM NO.
SCALE SHEET
DWG NO. REV
Pineapple Technology, Inc.
Rocklin, CA
Low Pass Filter
CIRCUIT DIAGRAM
No Serviceable Parts
Used as required
SECTION VI - SCHEMATIC AND PARTS LISTS
SUB-SECTION D - DTC25U
Page 15
Section VII
Recommended
Routine
Maintenance
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual VII -- ROUTINE MAINTENANCE
V
II --- ROUTINE MAINTENANCE
Routine Maintenance on the transmitter is very simple and straight forward. PTI recommends the following
steps to ensure long and eliable trouble-free service.
SCHEDULE: DAILY OR WEEKLY SERVICE
1. Check output power level to ensure that the meter is reading in the GREEN. If the level has changed
adjust the output level to 100% using the modulator output level adjust.
2. Check and record all meter readings in the station log.
3. Review readings and compare to history for possible variation that could indicate problems.
4. Check the air inlet filter and clean if necessary. If it looks dirty, it is dirty. Snap off the front grill an
d
wash the filter with light detergent and dry thoroughly before reinstalling. DO NOT use oils on the
filter.
5. Clear any items placed in front or in the rear of the transmitter that may restrict air flow.
NOTICE: SMALL FURRY ANIMALS LOVE THE WARMTH THE TRANSMITTER PROVIDES. ALWAYS
CHECK FOR ANY ACTIVITY BY THESE VISITORS AND SET TRAPS OR BAIT AS NECESSARY
.
SCHEDULE: MONTHLY +
A
ll the items listed above with air filter cleaning necessary.
NOTE: REPLACEMENT FILTERS ARE AVAILABLE THRU MOST ELECTRONIC DISTRIBUTERS.
LOOK FOR COMAIR ROTRON P/N: 020172
Page 16
Section VIII
Adjustments
and
Tuning
PINEAPPLE TECHNOLOGY, INC.
DTU25C Operating and Service Manual VIII -- ADJUSTMENTS AND TUNING
V
III --- ADJUSTMENTS AND TUNING
The DTU25C is a new series of digital transcoders offered by Pineapple Technology, Inc. The
latest in LDMOS device and circuit technology are employed to ensure reliable and serviceabl
e
operation for many years.
There are very few adjustments necessary to maintain full service condition. Typically the gai
n
adjustment shown in the initial Transcoder Turn-On Procedure (Section IV) of this manual should
require minimal attention. The front meter panel has been set up so that 100% indication in
Forward Power is equivalent to 25W average output power.
The input frequency (channel) can be adjusted, within the auspices of the broadcasting
re-transmission rights, to the appropriate required channel (See Larcan Manual). The transmitter
output must remain on the channel licensed by the FCC and in accordance with the supplied
digital mask filter.
Page 17
Section IX
Problem
Solving
&
Troubleshooting
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING
IX - PROBLEM SOLVING & TROUBLE SHOOTING
(
Pa
g
e 1of 2
)
The DTC25U is a "MODULAR ASSEMBLY" where most of the sub-assemblies can be
removed and or re
p
laced as necessar
y
as necessar
y
to maintain full service. To service this transmitter,
it is best to become familiar with the various sub-assemblies b
y
reviewin
g
the transmitter block dia
g
ram
and it's associated subs shown in the introduction. An
y
work
p
erformed on a transmitter licensed b
y
the FCC must be
p
erformed b
y
q
ualified
p
ersonnel.
FAILURE ANALYSIS STARTS WITH THE FOLLOWING ASSUMPTIONS:
1. The transmitter is connected to an AC source which is within the s
p
ecified volta
g
e ran
g
e
and has am
p
le
p
ower to run the transmitter.
2. The antenna has been checked out and a
p
ro
p
er match has been verified.
3. The room tem
p
erature is < +35 de
g
rees Celsius
(
+95 de
g
rees Fahrenheit
)
4. There are no restrictions in the air flow in or out of the buildin
g
.
5. The video and aural si
g
nals to the modulator com
p
l
y
with stated s
p
ecifications.
CHECKING THE WARNING LIGHTS
There are several warnin
g
si
g
nals visible on the front of the transmitter that will alert the technician
of
p
ossible
p
roblems. When viewed from the front, all the li
g
hts should be GREEN indicatin
g
normal
o
p
eration. An alert si
g
nal is indicated b
y
a RED li
g
ht. We will focus on RED alert si
g
nals in this section
.
LTX Mainframe Assembl
y
FAN FAULT RED indicates that the fuse su
pp
l
y
in
g
AC to the fan has failed. The fus
e
is located
j
ust inside the front
p
anel near the to
p
. See Fi
g
. 1 for location.
CHECK: FUSE AND/OR FAN
Fi
g
. 1
Page 18
PINEAPPLE TECHNOLOGY, INC.
DTC25U Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING
IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 2of 2)
TEMP FAULT RED indicates over tem
p
erature of PA or Hi
g
h VSWR
If Hi
g
h VSWR, the li
g
ht will c
y
cle 10 seconds OFF and 2 seconds ON
Put transmitter in STANDBY. Investi
g
ate antenna installation and
connections, check transmission lines and connections. Check
that transcoder u
p
converter is on fre
q
uenc
y
.
If Hi
g
h Tem
p
erature, the li
g
ht will c
y
cle OFF for several minutes then ON
for several minutes.
Check: Room tem
p
erature
Check: For Blocked Air Filter
Check: For Blocked Air Flow
Check: Transcoder Drive level. Verif
y
out
p
ut
p
ower is at 100% or less.
NOTE: If the AC Power is ON and all LED's are OFF and all meter readings are Zero (0) the DC Powe
r
Supply may cycle on and off if the internal fan has failed or Hi temp has failed. Th
e
internal DC supply may have failed and needs replacing
.
Transcoder Assembl
y
The Transcoder Assembly consists of the Larcan receiver and the Drake up converter. For
adjustment of the transcoder and understanding fault indications, refer to the Larcan and
Drake manuals.
Page 19
Section X
Warranty
PINEAPPLE TECHNOLOGY, INC.
UTX1K ULTRA Operating and Service Manual X -- WARRANT
Y
X -- WARRANT
Y
The WARRANTY provided by Pineapple Technology, Inc. (PTI) on this transmitter is detailed below.
It should be noted that some of the equipment sub-systems have warranty coverage by the orginal
manufacture that differs from the standard warranty provided by PTI Warrantydetails on equipment falling
into this category may be found in the Manufacturers instruction manual provided with the transmitter.
In all cases, replacement units of this equipment are normally in stock at PTI for quick turn service
support to our customers during the PTI Standard Warranty period.
STANDARD WARRANT
Y
Seller warrants that each Product sold by it is free of defects in materials and workmanship. Seller's
obligation under said warranty continues for a period of one (1) year from date of shippment. Repairs or
replacement of defective parts shall be the sole and exclusive remedy under waranty, at Seller option,
provided that Seller may, as an alternative, elect to refund an equitable portion of the purchase price
of the product. THIS WARRANTY IS EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER
EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO WARANTIES OF
FITNESS FOR A PARTICULAR PURPOSE, USE, OR APPLICATION, AND ALL OTHER OBLIGATION
S
OR LIABILITIES ON THE PART OF THE SELLER, UNLESS SUCH OTHER WARRANTIES
OBLIGATIONS OR LIABILITIES ARE EXPRESSLY AGREED TO IN WRITING BY SELLER.
WARRANTY REPLACEMENT AND REPAIR
S
A
ll claims under warranty must be made promptly after occurrence of circumstances giving rise to thereto
and must be received within the applicable warranty period by seller or its authorized representatives.
Such claims must be documented on a PTI* Field Failure Report with a full description of the circumstances
giving rise to the claim. Before any products are returned for repair and/or adjustment, written authorization
form seller or its authorized representative for the return and instructions as to how and where these
products should be shipped must be obtained. This is to include a Return Authorization (RA) number
provided by the seller or authorized representative, this must accompany ALL returns. Any product
returned to the seller for the examination shall be sent prepaid via the means of transportation indicated as
acceptable by seller. Seller reserves the right to reject any warranty claim not promptly reported and any
claim on any item that has been altered, i.e. circuit modifications, components removed, or has been shipped
by non acceptable means of transportation. When a product has been returned for examination and inspection,
or for any other reason, customer shall be responsible for all damage resulting from improper packaging or
handling, and for loss in transit, notwithstanding any defect or nonconformity in the product. In all cases the
seller has sole responsibility for determining the cause and nature of the failure, and the Seller's
determination with regard thereto shall be final. If it is found that Seller's Product has been returned without
cause and is still serviceable, customer will be notified and the Product returned at its expense, in addition,
a charge for testing and examination may, in Sellers sole discretion be made on Products so returned.
* A field Failure Report is included at the end of this manual - Additional Field Failure Reports can be obtained by calling
Pineapple Technology, Inc. at (916) 652-1116 or you may download one from our website at www.ptibroadcast.com
in the Warranty section.
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