Read LG 42PM4M-WA (CHASSIS:PM75A) Service Manual online
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TROUBLE SHOOTING GUIDE
5. In case of an unusual display in RGB
(1) Procedure check
Check the
input Jack(P503)
Check the Signal Cable
And Output Device
And Output Device
Yes
No
Check the Schmitt triger
I/O SYNC(IC507)
Yes
Check the Vcc and
Peripherals of IC507
Peripherals of IC507
No
1. Check the IC101
2. Check the Vcc of IC101
3. Check the Peripherals of IC101
2. Check the Vcc of IC101
3. Check the Peripherals of IC101
No Raster State On
RGB Signal
6. In case of an unusual display in Component1,2
(1) Procedure check
Check the
input Jack(JK510,
JK511,JK512)
Check the Signal Cable
And Output Device
And Output Device
Yes
No
1. Check the IC101
2. Check the Vcc of IC101
3. Check the Peripherals of IC101
2. Check the Vcc of IC101
3. Check the Peripherals of IC101
No Raster State On
Component Signal
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