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60PM4M-WA (CHASSIS:PM75A) - LG TV Service Manual (repair manual). Page 18

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- 18 -
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
Yes
No
Check the Schmitt triger
I/O SYNC(IC507)
Yes
Check the Vcc and 
Peripherals of IC507
No
1. Check the 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
Yes
No
1. Check the IC101
2. Check the Vcc of IC101
3. Check the Peripherals of  IC101
No Raster State On
Component Signal
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