Troubleshooting Flow Charts - Sanyo DP50741 Service Manual

NO POWER
the voltage to all lines
Check 'Power Failure' Circuit.
Power Failure Line
MAIN IC (IC5500) W7 pin

TROUBLESHOOTING FLOW CHARTS

Is
fuse open?
No
Is
the voltage
to "5V_STBY" line
supplied?
Yes
Is
supplied?
Yes
(or the voltage to some lines is not supplied.)
After a few seconds, the set will be switched off.
Yes
Check: Power Unit
No
Check: Power Unit
All 0V
No:
(except '5V_STBY' line)
Check: arround
MAIN IC (IC5500),
Crystal (X5500), Power Unit
Diod Detected Voltage
D1641
D1621
D1668
D6702
– 32 –
9V
5V
AUDIO_POW
3.3V