(No.MB713<Rev.002>)1-25
5.5
AUDIO u-COM circuit (DVD & AMP)
YES
Power On.
YES
NO
YES
YES
YES
YES
Replace IC101.
YES
NO
NO
NO
NO
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
Does it
appear DVD Error
at FLD?
Does
Reading appear
at FLD?
Does
no Disc or Time
appear at
FLD?
Refer to SMPS.
Check
power part of
Main B/D.
OK
Does
CD/DVD appear at
FLD?
Does
AV1,TV AUDIO,
AV1 OPT and FM 87.5
appear at
FLD.
Check
if DVD/CD insert
is OK.
Refer to oscillator circuit.
Check
oscillator of
X100.
Check Power.
Check IC101 Pin29
reset waveform.
Check
if IC101 Pin29
is high.
Check DVD Module.
Check 5V line.
Check if
IC101 Pins 14,40,
55,89 are high
(5V).
Check SMPS.
Check power section
circuit.
Check
if IC101 Pin58
is high.
