LG LPA-735 Service Manual page 21

2. MPEG Circuit
Power is on
Does Logo appear
on the screen?
YES
Does the
Video of the DVD Disc
play properly?
YES
Does the
Video of the video
CD play properly?
YES
OPTION
If included VCD function.
Does the audio sound
output normally?
YES
END
NO
Check power & clock.
YES
NO
Is MPEG data signal normal?
YES
YES
Is error signal normal?
NO
Is MPEG data signal normal?
YES
Is Clock normal?
YES
Does the audio
NO
signal output from MPEG
decoder?
YES
3-14
NO
Check CD/DVD DSP output
signal.
OK
OK
Check MPEG Decoder input
signal.
NO
Check CD/DVD DSP output
signal.
OK
Check MPEG Decoder input
signal.
NO
Check CD/DVD DSP output
signal.
OK
Check MPEG Decoder input
signal.
NO
Check clock signal
Check clock signal