Adjustment Method - LG 50PG20D Service Manual

Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
8. POWER PCB Assy Voltage
Adjustments
8-1. Test Equipment :
8-2.Connection Diagram for Measuring
: refer to Fig.1

8-3. 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 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 VR951, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(Fig.1) Connection diagram of power adjustment for measuring
(Fig.2) 50" Full HD Power PCB Assy Voltage adjustment
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
(Va, Vs Voltage adjustments)
D.M.M. 1EA
* Press the POWER ON KEY on R/C before Model name download.
Befor adjusting White-balance, the AV ADC should be done.
If ADC status were "NG", Need to ADC adjustment.
9. Adjustment of White Balance
9-1. Required Equipment
(1) Color Analyzer : CA-1000, CA-100+(CH.10) CA-210(CH.10).
* Please adjust CA-100+/CA-210 by CS-1000 before
measuring.
-> You should use Channel 10 which is Matrix
compensated(White, Red, Green, Blue revised) by CS-
1000 and adjust in accordance with balance adjustment
coordinate.
W Color temperature standards according to CSM and Module.
CSM PLASMA
Cool 11000K
Normal 9300K
Warm 6500K
W
Change target luminance and range of the Auto adjustment
W/B equipment.
Target luminance
Range
W White balance adjustment coordinate and color temperature.
Cool CS-1000
X 0.276
0.283
y
uv 0.000
Medium CS-1000
X 0.285
0.293
y
uv 0.000
Warm CS-1000
X 0.313
y 0.329
uv 0.003
* PC(for communication through RS-232C)
-> UART Baud rate : 115200 bps
- 8 -
Remark
65
20
CA-100+(CH.10) CA-210(CH.10)
0.276±0.002 0.276±0.002
0.283±0.002 0.283±0.002
0.000 0.000
CA-100+(CH.10) CA-210(CH.10)
0.285±0.002 0.285±0.002
0.293±0.002 0.293±0.002
0.000 0.000
CA-100+(CH.10) CA-210(CH.10)
0.313±0.002 0.313±0.002
0.329±0.002 0.329±0.002
0.003 0.003
LGE Internal Use Only