50PG20R-TA (CHASSIS:PP81A) - LG TV Service Manual (repair manual). Page 13

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10. Default Value in Adjustment
10-1. White Balance
(Default values maybe modified the module condition)
10-2. Press CH write condition
(1) AC on tilme on only one after assembled automatically
(2) CH recover SVC OSD manually
12. Sound spec.
Caution: Each PCB assembly must be checked by check JIG set.
(Because  power  PCB  Assembly  damages  to  PDP
Module, especially be careful)
13. POWER PCB Assy Voltage
Adjustment
(Va, Vs voltage Adjustment)
13-1. Test Equipment:
D.M.M 1EA
13-2. Connection Diagram for Measuring
Refer to Fig. 5
13-3. 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  P812,
connect -terminal to GND pin of P812.
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)  Connect  +  terminal  of  D.  M..M.  to  Vs  pin  of  P812,
connect -terminal to GND pin of P812.
2)  After  turning  VR951  401,  voltage  of  D.M.M  adjustment
as same as Vs voltage which on label of panel right/top
( deviation ; ±0.5V)
<Fig. 5> Connection Diagram of Power Adjustment for Measuring
Item
Dielectric Voltage (AC <-> FG)
Dielectric Voltage (Without FG)
Value
1.5
1.5
3
3
Unit
kV
kV
Remark
At 100mA for 1sec (Line)
At 100mA for 1min (OQC)
At 100mA for 1sec (Line)
At 100mA for 1min (OQC)
Item
Min
Typ
Max
Unit
Remark
Audio Practical Max Output, L(Mono)/R
9
10
12
W
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