Adjustment Method - LG 42PG6900 Service Manual

SET Assembly Adjustment Method
Caution: Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
6. 50" POWER PCB Ass'y Voltage
Adjustment
(Va, Vs Voltage Adjustment)
6-1. Model Name :

6-2. Adjustment Method

(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D. M..M. to Va pin of P811, connect -
terminal to GND pin of P811.
3) After turning VR901,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top (deviation;
±0.5V)
(2) Vs Adjustment
1) Input signal : RF noise signal
2) Connect + terminal of D. M..M. to Vs pin of P811, connect -
terminal to GND pin of P811.
3) After turning VR 951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)
<Fig. 3> 50inch Power PCB Assy Voltage adjustment
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
50PG6900,50PG6910
7. 42" POWER PCB Ass'y Voltage
Adjustment
(Va, Vs Voltage Adjustment)
7-1. Model Name:
7-2. Adjustment Method
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D. M..M. to Va pin of P811, connect -
terminal to GND pin of P811.
3) After turning VR901,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top (deviation;
±0.5V)
(2) Vs Adjustment
1) Input signal : RF noise signal
2) Connect + terminal of D. M..M. to Vs pin of P811, connect -
terminal to GND pin of P811.
3) After turning VR 951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)
<Fig. 4> 42inch Power PCB Assy Voltage adjustment
8. EDID(The Extended Display
Identification Data) / DDC
(Display Data Channel) Download
8-1. Required Test Equipment
(1) Adjusting PC with S/W for writing EDID Data.(S/W: EDID
TESTER Ver.2.5)
(2) A Jig for EDID Download
(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
8-2. Setting of Device
<Fig. 5> Connection Diagram of DDC download
42PG6900,42PG6910
LGE Internal Use Only