LG 50PX950, Руководство по обслуживанию

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10. POWER PCB Ass’y Voltage
Adjustment
(Va/Vs Voltage Adjustment)
(1)Test equipment : D.M.M 1EA
(2) Connection Diagram for Measuring : refer to fig.1
10-1. Adjustment method
(1) Vs adjustment (refer fig.1)
1) Connect + terminal of D.M.M. to Vs pin of
P812(42”:P811), connect -terminal to GND pin of
P812(42”:P811)
2) After turning VR901, voltage of D.M.M adjustment as
same as Vs voltage which on label of panel left/top (
deviation ; ±0.5V)
(2) Va adjustment (refer fig.1)
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of
P812(42”:P811), connect -terminal to GND pin of
P811(42”:P812).
3) After turning VR502,voltage of D.M.M adjustment as
same as Va voltage which on label of panel left/top
(deviation; ±0.5V)
11. Default Service option.
11-1. ADC-Set
.
V
R-Gain adjustment Value (default 128)
V
G-Gain adjustment Value (default 128)
V B-Gain adjustment Value (default 128)
V
R-Offset adjustment Value (default 128)
V
G-Offset adjustment Value (default 128)
V
B-Offset adjustment Value (default 128)
11-2. White balance. Value.
11-3. Temperature Threshold
V Threshold Down Low 20
V
Threshold Up Low 23
V
Threshold Down High 70
V Threshold Up High 75
12. USB DOWNLOAD
(*.epk file download)
V
Put the USB Stick to the USB socket
V
Press Menu key, and move OPTION
V Press “FAV” Press 7 times.
- 12 - LGE Internal Use Only Copyright ©2010 LG Electronics Inc. All rights reserved.
Only for training and service purposes
< fig.1 : 50 FHD Power PCB Assy Voltage adjustment >
CENTER (DEFAULT)
Cool Mid Warm
R Gain 192 192 192
G Gain 192 192 192
B Gain 192 192 192
R Cut 64 64 64
G Cut 64 64 64
B Cut 64 64 64