50PB4RT-TB (CHASSIS:PP7BA) - LG TV Service Manual (repair manual). Page 7

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(Va, Vs Voltage adjustments)

D.M.M. 1EA

: refer to Fig.2

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  VR501,  voltage  of  D.M.M  adjustment  as

same  as  Va  voltage  which  on  label  of  panel  right/top.
(Deviation; ±0.5V)

1) Connect + terminal of D.M.M to Vs pin of P812, connect

– terminal to GND pin of P812.

2)  After  turning  VR401,  voltage  of  D.M.M  adjustment  as

same  as  Va  voltage  which  on  label  of  panel  right/top.
(Deviation; ±0.5V)

* Press the FRONT-AV Key on R/C for converting input mode.

(Change RS-232 Host : pc, BaudRate : 115200bps)

Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)

* Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists

* Never connect HDMI & DVI-D & DVI-A Cable at the same time.
* Use the proper cables below for EDID Writing
* HDMI 1 and HDMI2 is different each other. So you have to

Download different EDIT File.

(Fig.2) Connection diagram of power adjustment for measuring

For Analog EDID

D-sub to DVI-I

DVI-D to DVI-D

For Digital EDID

For HDMI EDID

DVI-D to HDMI or HDMI to HDMI

1

2

3

Manufacturer

Version

Revision

GSM

Digital : 1

Digital : 3

1E6D

01

03

Condition

Item

No

Hex Data

MSPG925FA

Component

RGB-PC

RF/AV/S-VIDEO

ADC

Model : 60

(1024*768 60Hz)

Pattern : 65

*100% Color Bar

Model:217(720P)

Pattern : 65

*100% Color Bar

PAL

INPUT

AV1 - TB

SELECT AV3 - ZF

Model : 202

(PAL-BGDHI)

Pattern : 65

*100% Color Bar

- System control RS-232 Host should be “PC“ for adjustment.