Amp Part; Electrical Troubleshooting Guide; Audio Μ-Com Circuit - Zenith D35 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

AUDIO µ-COM Circuit
POWER ON
Does CD/DVD appear
at FLT?
YES
Does Loading appear
at FLD?
YES
Does no Dise 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.

AMP PART

NO
NO
Does it appear DVD Error
at FLD?
YES
NO
Check Connector (PN103)
if is normally.
YES
Check power part of Main
B/D.
YES
NO
Check oscillator of X101.
YES
Check if CN901 Pin7
is high.
YES
Check if IC101 Pin53
is high.
YES
Check if IC101 Pin9, 36,
59 is high(5V).
YES
Check if IC101 Pin49
is high.
YES
Replace IC101.
Does CD/DVD appear
at FLT?
YES
NO
NO
Reconnet it.
NO
Refer to SMPS.
NO
Refer to oscillator Circuit.
NO
Check DVD Reset
Waveform.
NO
Check IC101 Reset
Waveform.
NO
Check 3.3V line.
NO
Check Power dection
Circuit.
3-90
NO
OK