Check if 112V is short
to ground?
LED ok,No Picture,
No sound
Replace Q402
Check IC201 power
5V ok?
Check which branch
short to ground and
repairing
Check waveform of
X001ok?
The waveform of
SDA and SCL ok?
The waveform of
H-out of IC 201 ok?
Check +5VA ok
？
Check if 18V is short
to ground?
Replace IC601
Replace IC205
Replace IC201
Q401output
waveform ok?
Replace Q401 or D406
Q401output
waveform ok?
Check each pin of
T402 ok?
Check IC301 ok?
Replace T402
Check ambient
parts of IC301
and replace the bad
Replace IC301
Replace X001
Replace IC001
Replace Q401
OVER
Y
N
Y
N
N
Y
N
Y
Y
N
Y
N
Y
N
Y
N
N
Y
N
Y
N
Y
6
、
Troubleshooting
Содержание SY33
Страница 18: ...7ÿSchematic Diagram ...
Страница 20: ......
