LG XH-T3029S Service Manual page 35

3. AUDIO µ-COM Circuit(DVD & AMP)
POWER ON.
Does CD/DVD appear
at FLD?
YES
Does Loading appear
at FLD?
YES
Does no Disc or Time
appear at FLD?
YES YES
Check if DVD an audio
micom insert is OK.
YES
Check Power.
YES
Check DVD Module.
Check SMPS.
LGE Internal Use Only
NO
NO
Does it appear DVD Error
at FLD?
YES
NO
Check power part of Main
B/D.
YES
Check oscillator of X101.
YES
NO
Check if IC101 Pin41
is high.
YES
Check if IC101 Pin15, 16,
47 are high(5V).
YES
Check if IC101 Pin1
is high.
YES
Replace IC101.
Does AUX, SCART, OPT
and FM 87.5 appear at FLD.
NO
NO
NO
Refer to SMPS.
NO
Refer to oscillator circuit.
NO
Check IC101 reset
waveform.
NO
Check 3.3V line.
NO
Check power section
circuit.
3-8 Copyright © 2007 LG Electronics. Inc. All right reserved.
YES
OK
Only for training and service purposes