Troubleshooting - LG PF-43A20 Service Manual

NO PICTURE/
NO COLOR
Is the CVBS signal at
pin 4 of P101A normal?
Yes
Is the CVBS signal at
Pin 40 of IC201 normal?
Yes
Is the Y signal at Pin 3
of IC1D normal?
Yes
Is the Y signal at Pin 37
of IC201 normal?
Yes
Are B-Y, R-Y signal at Pins
33, 34 of IC501 normal?
Yes
Are B,G,R signal at Pins 12,
13,14 of IC501 normal?
Yes
Check CPT Board

TROUBLESHOOTING

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No
Check IF Board
No
Check/Replace
IC201
No
Check/Replace
IC1D, Q202
No
Check/Replace
IC2D.
No
Check/Replace
IC501
No
Check/Replace
IC501