LG 50PG6300 Service Manual page 29

13. No Sound – AV1/2(SCART) Input
- Check the condition of the SCART cable connection.
- Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
Check input source cable or jack(JP436,466)
Check input source cable or jack(JP436,466)
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Only for training and service purposes
No Sound
Pass
Check the signal(R,L) input/output of
U397
Pass
Repeat D Process
Pass
SCART OUTPUT
Pass
Check the signal(R,L) of U436,466
Pass
Check the signal(R,L) of
L441,L442,L471,L472
Pass
Fail
Fail
Fail
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Re-soldering or Change the
defect part(U397)
Re-soldering or Change the
defect part(U81)
Re-soldering or Change the
defect part(U436,466)
LGE Internal Use Only