Read LG 50PS11-UB (CHASSIS:PU92B) Service Manual online
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4. ADC Process
4-1. Auto ADC Process (using DFT)
PC (for communication through RS-232C) UART Baud rate
: 115200 bps
Command : aa 00 00 (Start factory mode)
Command : ad 00 10 (working Auto ADC)
Command : aa 00 90 (End of Auto ADC Process)
: 115200 bps
Command : aa 00 00 (Start factory mode)
Command : ad 00 10 (working Auto ADC)
Command : aa 00 90 (End of Auto ADC Process)
4-2. Manual ADC Process using Service
Remocon
After enter Service Mode by pushing “ADJ” key, execute
“ADC Adjust” by pushing “
“ADC Adjust” by pushing “
G
” key at “0. ADC CALIBRATION”.
4-3. Confirmation
(1) We confirm whether “0xBF(480i)/0xC8(1080i)” address of
EEPROM “0xA2” is “0xAA” or not.
(2) If “0xBF(480i)/0xC8(1080i)” address of EEPROM “0xA2”
isn’t “0xAA”, we adjust once more
(3) We can confirm the ADC values from “0xB9 ~ 0xBE(480i) /
0xC2 ~ (1080i)” addresses in a page “0xA2”
(4) Manual ADC Confirmation using Service Remocon. After
enter Service Mode by pushing “INSTART” key,
5. DDC EDID Write Confirmation
Caution: Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
Module, especially be careful)
Caution: Set up “RF mode(noise)” before voltage adjustment.
6. POWER PCB Ass’y Voltage
Adjustment
(Va, Vs voltage Adjustment)
6-1. Test Equipment:
D.M.M 1EA
6-2. Connection Diagram for Measuring
Refer to Fig.1, Fig 2, Fig 3
6-3. Adjustment Method
(1) 42”, 50” Vs Adjustment (refer fig.1)
1) Connect + terminal of D.M.M. to Vs pin of P811, connect
- terminal to GND pin of P811.
2) After turning VR901,voltage of D.M.M adjustment as
same as Vs voltage which on label of panel right/top
(deviation; ±0.5V)
(deviation; ±0.5V)
(Fig.1) 42/50inch Power PCB Assy Voltage Adjustment
(Fig.1) 42/50inch Power PCB Assy Voltage Adjustment
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