Text preview for : ya098f.pdf part of JVC PD-42B50BJ SERVICE MANUAL
Back to : JVC TV Chassis FP2.part01 | Home
SERVICE MANUAL
PDP COLOUR TELEVISION
12 2005 YA098F
PD-42B50BJ, PD-42B50BJ/K, PD-42B50BS, PD-42B50BU
Supplementary
BASIC CHASSIS
FP2
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-42B50BJ, PD-42B50BJ/K, PD-42B50BS and PD-42B50BU service manual. For details other than those described in this manual, please refer to the PD-42B50BJ and PD-42B50BU service manual (No.YA098, 2004/6)(No.YA098D, 2004/11) PD-42B50BS service manual (No.YA099C, 2004/6)(No.YA098D, 2004/11) PD-42B50BJ/K service manual (No.YA098E, 2005/4).
DIFFERENCE LIST
USING P.W. BOARD (Page 3-3)
P.W.B ASS'Y Name X-MAIN P.W.B Y-MAIN P.W.B P.W.B ASS'Y No. Before LJ92-00943A LJ92-00944B After LJ92-01057B LJ92-01058B DESCRIPTION
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA098F 2005/12
PRINTED WIRING BOARD PARTS LIST
X-MAIN P.W. BOARD ASS'Y (Page 3-29) Ref. No. Part No. Before LJ92-00943A After LJ92-01057B PART NAME X-MAIN PWB DESCRIPTION
Y-MAIN P.W. BOARD ASS'Y (Page 3-29) Ref. No. Part No. Before LJ92-00944B After LJ92-01058B PART NAME Y-MAIN PWB DESCRIPTION
SECTION 1 PRECAUTION Please refer to "PD-42B50BJ and PD-42B50BU (No.YA098)" about this section.
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS Please refer to "PD-42B50BJ and PD-42B50BU (No.YA098)" about this section.
SECTION 3 DISASSEMBLY Please refer to "PD-42B50BJ and PD-42B50BU (No.YA098)" about this section.
1-2 (No.YA098F)
SECTION 4 ADJUSTMENT
4.1 ADJUSTMENT AFTER THE Y-MAIN PWB REPLACEMENT When the Y-MAIN PWB is replaced, adjustments are required. If it is misadjusted, phenomena such as faulty light emission of the PANEL will occur. The adjustment parts and the test points vary according to the Y-MAIN PWB, and the adjustment values vary according to the PANEL types. Before starting the adjustment procedure, check the Y-MAIN PWB and the PANEL type first.
< An example of misadjustment of the Y-MAIN PWB >
Faulty light emission occurrence
4.1.1 THE LOCATION OF THE PWB IN THE PDP UNIT
X-MAIN PWB
PDP (PANEL) UNIT
G-BUFFER PWB F-BUFFER PWB Y-BUFFER-U PWB Y-BUFFER-L PWB
LOGIC-MAIN PWB E-BUFFER PWB
Y-MAIN PWB
(No.YA098F)1-3
4.1.2 ADJUSTMENT ITEMS AND TESTING POINTS ON THE Y-MAIN PWB [LJ92-00944B]
VR5004
TP VSCH
TP OUT4
Rear of set
VR5001
VR5003
VR5002
1-4 (No.YA098F)
4.1.3 ADJUSTMENT ITEMS AND TESTING POINTS ON THE Y-MAIN PWB [LJ92-01058B]
VR5004 TP VSCH (There is nothing written on the PWB)
TP OUT4
Rear of set
VR5001 VR5003 VR5002
(No.YA098F)1-5
4.1.4 ADJUSTMENT PROCEDURE There are 2 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 ALIMINUM PRESS PLATE-A TYPE ALIMINUM PRESS PLATE-B TYPE How to identify types of the PDP PANEL SERIAL 1213 xxxx xxxx PANEL SERIAL 1223 xxxx xxxx
First subfield
Second subfield
Third subfield
VR5001 adjustment (Adjust the flat part of the waveform in the third subfield.) VR5002 adjustment (Adjust the flat part of the waveform.)
VR5003 adjustment (Adjust the flat part of the waveform.)
First subfield
1-6 (No.YA098F)
4.1.5 ADJUSTMENT FOR THE ALIMINUM PRESS PLATE-A TYPE [PANEL SERIAL 1213 xxxx xxxx]
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
VR5001
VR5003
VR5002
(No.YA098F)1-7
4.1.6 ADJUSTMENT FOR THE ALIMINUM PRESS PLATE-B TYPE [PANEL SERIAL 1223 xxxx xxxx]
Step1. VR5004 adjustment TEST POINT TP Vsch DC voltmeter 40 V
TP VSCH (There is nothing written on the PWB) 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
VR5001
VR5003
VR5002
1-8 (No.YA098F)
SECTION 5 TROUBLESHOOTING Please refer to "PD-42B50BJ and PD-42B50BU (No.YA098)" about this section.
(No.YA098F)1-9
Victor Company of Japan, Limited Flat Panel Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
(No.YA098F)
Printed in Japan VPT