JVC PD-42V31BJE User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.YA013C
2006/1
PDP COLOUR TELEVISION
YA013C20061
PD-42V31BJE,
PD-42V31BSE,
PD-42V31BUE
HOW TO IDENTIFY TYPES OF THE PDP PANEL
There are 3 types of PDP used with this model. Make sure to confirm the type of the panel before performing the procedure as the
adjustment value varies according to the panel type. Refer to the below table and identify the PDP in accordance with he panel base
material and the serial No.
Supplementary
Please be informed that the related contents are added due to the change of the PWB in the PDP Unit.
Therefore, this service manual describes only the items which differ from those of the PD-42V31BJE,
PD-42V31BSE and PD-42V31BUE service manual.
For details other than those described in this manual, please refer to the PD-42V31BJE, PD-42V31BSE and
PD-42V31BUE service manual (No.YA013, 2003/9)(No.YA013B, 2004/6).
Panel base material Types of the PDP How to identify types of the PDP
ALIMINUM DIE-CAST ALIMINUM DIE-CAST TYPE -----
ALIMINUM PRESS PLATE ALIMINUM PRESS PLATE-A TYPE PANEL SERIAL 1213 xxxx xxxx
ALIMINUM PRESS PLATE-B TYPE PANEL SERIAL 1223 xxxx xxxx
BASIC CHASSIS
MK

1-2 (No.YA013C)
TABLE OF NEW AND OLD PWB
SECTION 1
PRECAUTION
Please refer to "PD-42V31BJE, PD-42V31BSE and PD-42V31BUE (No.YA013)" about this section.
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Please refer to "PD-42V31BJE, PD-42V31BSE and PD-42V31BUE (No.YA013)" about this section.
SECTION 3
DISASSEMBLY
Please refer to "PD-42V31BJE, PD-42V31BSE and PD-42V31BUE (No.YA013)" about this section.
PWB assy Name PDP Panel unit No. Part No.
Old New
X-MAIN PWB QLE0023-001 LJ92-00758A
LJ92-01057BQLE0023-002
QLE0023-003 LJ92-00943A
Y-MAIN PWB QLE0023-001 LJ92-00759A LJ92-00759A-S
QLE0023-002
QLE0023-003 LJ92-00944B LJ92-01058B

(No.YA013C)1-3
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT AFTER THE Y-MAIN PWB REPLACEMENT
< An example of misadjustment of the Y-MAIN PWB >
4.1.1 THE LOCATION OF THE PWB IN THE PDP UNIT
Faulty light emission occurrence
PDP (PANEL) UNIT
Y-BUFFER-U PWB
Y-BUFFER-L PWB E-BUFFER PWB
F-BUFFER PWB
G-BUFFER PWB
Y-MAIN PWB
X-MAIN PWB
LOGIC-MAIN PWB

1-4 (No.YA013C)
4.1.2 ADJUSTMENT ITEMS AND TESTING POINTS ON THE Y-MAIN PWB [LJ92-00759A]
VR5001
VR5002
VR5003
TP OUT4
TP VSCH
VR5004
Rear of set

(No.YA013C)1-5
4.1.3 ADJUSTMENT ITEMS AND TESTING POINTS ON THE Y-MAIN PWB [LJ92-00944B]
Rear of set
TP OUT4
VR5003
VR5004
TP VSCH
VR5001
VR5002

1-6 (No.YA013C)
4.1.4 ADJUSTMENT ITEMS AND TESTING POINTS ON THE Y-MAIN PWB [LJ92-00759A-S] [LJ92-01058B]


TP OUT4
VR5003
VR5004
VR5001
VR5002
Rear of set
TP VSCH
(There is nothing written on the
PWB)

(No.YA013C)1-7
4.1.5 ADJUSTMENT PROCEDURE
There are 3 types of PDP used with this model. Be careful as the adjustment values are different according to the types of the panel.
The types of the PDP are as shown in the table below.
Types of the PDP How to identify types of the PDP
ALIMINUM DIE-CAST TYPE -----
ALIMINUM PRESS PLATE-A TYPE PANEL SERIAL 1213 xxxx xxxx
ALIMINUM PRESS PLATE-B TYPE PANEL SERIAL 1223 xxxx xxxx
First subfield
First subfield
Second subfield Third subfield
VR5002 adjustment
(Adjust the flat part of the waveform.)
VR5003 adjustment
(Adjust the flat part of the waveform.)
VR5001 adjustment
(Adjust the flat part of the
waveform in the third subfield.)

1-8 (No.YA013C)
4.1.6 ADJUSTMENT FOR THE ALIMINUM DIE-CAST TYPE
(1) Connect an oscilloscope to the TP OUT4.
(2) Carry out the adjustment from the Step1 through 4 in order.
VR5003 VR5002
VR5001
TP VSCH Step1. VR5004 adjustment
TEST POINT TP Vsch
DC voltmeter 40 V
Step2. VR5003 adjustment
TEST POINT TP OUT4
Oscilloscope 10 us
Step3. VR5002 adjustment
TEST POINT TP OUT4
Oscilloscope 10 us
Step4. VR5001 adjustment
TEST POINT TP OUT4
Oscilloscope 15 us

(No.YA013C)1-9
4.1.7 ADJUSTMENT FOR THE ALIMINUM PRESS PLATE-A TYPE [PANEL SERIAL 1213 xxxx xxxx]
(1) Connect an oscilloscope to the TP OUT4.
(2) Carry out the adjustment from the Step1 through 4 in order.
VR5001
VR5003 VR5002
Step1. VR5004 adjustment
TEST POINT TP Vsch
DC voltmeter 40 V
Step2. VR5003 adjustment
TEST POINT TP OUT4
Oscilloscope 10 us
Step3. VR5002 adjustment
TEST POINT TP OUT4
Oscilloscope 10 us
Step4. VR5001 adjustment
TEST POINT TP OUT4
Oscilloscope 15 us
TP VSCH

1-10 (No.YA013C)
4.1.8 ADJUSTMENT FOR THE ALIMINUM PRESS PLATE-B TYPE [PANEL SERIAL 1223 xxxx xxxx]
(1) Connect an oscilloscope to the TP OUT4.
(2) Carry out the adjustment from the Step1 through 4 in order.
VR5001
VR5003 VR5002
Step1. VR5004 adjustment
TEST POINT TP Vsch
DC voltmeter 40 V
Step2. VR5003 adjustment
TEST POINT TP OUT4
Oscilloscope 10 us
Step3. VR5002 adjustment
TEST POINT TP OUT4
Oscilloscope 10 us
Step4. VR5001 adjustment
TEST POINT TP OUT4
Oscilloscope 15 us
TP VSCH
(There is nothing written on the PWB)