Mpeg Circuit - LG DP391B Service Manual

MAIN ELECTRICAL TROUBLESHOOTING GUIDE

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?
OPTION
If included VCD function.
Does
the audio sound output
normally?
YES
END
LGE Internal Use Only
NO
Check power & clock.
YES
NO
Is MPEG data
signal normal?
YES
Is error
signal normal?
NO
Is MPEG data
signal normal?
Is Clock normal?
NO
Does the audio
signal output from MPEG
decoder?
3-22
NO
OK
YES
NO
NO
NO
YES
NO
YES
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Only for training and service purposes
Check CD/DVD DSP
output signal.
OK
Check MPEG Decoder
input signal.
Check CD/DVD DSP
output signal.
YES
Check MPEG Decoder
input signal.
Check CD/DVD DSP
output signal.
OK
Check MPEG Decoder
input signal.
Check clock signal
Check clock signal