LG 50PG6300 Service Manual page 26

10. No Sound – Component Input
- Check the condition of the Component cable connection.
- Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
Check the signal (R,L) of U81
Check the signal (R,L) of U518
Check the signal of Speaker
Check input source cable or Jack(JP351)
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Only for training and service purposes
No Sound
Pass
Check the signal(R,L)
of U211
Pass
Pass
Pass
Pass
Fail
Re-soldering or Change the
defect part(U211)
Fail
Re-soldering or Change the
defect part(U81)
Fail
Re-soldering or Change the
defect part(U518)
Fail
Check Speaker connector(JP516)
­26­
or harness
LGE Internal Use Only