JVC TH-G40C Service Manual page 24

5.5 AUDIO Micom Circuit (DVD & AMP)
Power On.
YES
Does
CD/DVD appear at
FLD?
YES
Does
Loading appear
at FLD?
YES
Does
no Disc or Time
appear at FLD?
YES
Check
if DVD an audio
micom insert is
OK.
YES
Check Power.
YES
Check DVD Module.
YES
Check SMPS.
1-24 (No.MB672<Rev.002>)
NO
Does
NO
it appear DVD Error
at FLD?
YES
Check
NO
power part of Main
B/D.
YES
Check
oscillator
X101.
YES
Check
NO
if IC101 Pin5
is high.
YES
Check
if IC101 Pin9,36,59 are
high(5V).
YES
Check
if IC101 Pin44
is high.
YES
Replace IC101.
Does AV1,
TV AUDIO, AV1 OPT and
FM 87.5 appear
at FLD.
NO
NO
NO
Refer to SMPS.
NO
Refer to oscillator cir-
cuit.
NO
Check IC101 reset
waveform.
NO
Check 5V line.
NO
Check power section
circuit.
YES
OK