LG HT353SD - Page 21

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7. AUDIO µ-COM Circuit(DVD & AMP)
Check DVD Module.
Check SMPS.
OK
YES
Power On.
Does
CD/DVD appear at
FLD?
YES
NO
Does
Loading appear
at FLD?
Does
it appear DVD Error
at FLD?
Does Aux,
Scart, opt and FM 87.5
appear at FLD.
YES
Does
no Disc or Time
appear at FLD?
YES
Check
if DVD an audio
micom insert is
OK.
Check Power.
YES
YES
YES
Replace IC101.
YESNO
NO
NO
NO
Refer to SMPS.
NO
Refer to oscillator circuit.
NO
Check IC101 reset
waveform.
NO
NO
YES
Check
power part of Main
B/D.
Check
oscillator o
X101.
Check
if IC101 Pin5
is high.
YES
YES
YES
Check 3.3V line.
NO
Check power section
circuit.
NO
Check
if IC101 Pin9,36,59 are
high(5V).
Check
if IC101 Pin49
is high.
YES
YES