Troubleshooting Flow Charts - Sanyo DP47460 Service Manual

TROUBLESHOOTING FLOW CHARTS

NO POWER
Check 'Power Failure' Circuit.
Is
fuse open?
No
Is
the voltage
to "5V_STBY" line
supplied?
Yes
Is
the voltage to all lines
supplied?
Yes
(or the voltage to some lines is not supplied.)
After a few seconds, the set will be switched off.
Power Failure Line
CPU (IC800) 48pin
CPU (IC800) 23pin
Yes
Check: Power Unit
No
Check: Power Unit
All 0V
No:
(except '5V_STBY' line)
Check: arround
CPU (IC800), EEPROM (IC801),
Crystal (X800, X801), Power Unit
Main Board
Diod Detected Voltage
D1660
D1632 / D1633
D1651
D1674
120Hz Board
Diod Detected Voltage
D6722 / D6721
D6791
Main Board
Diod Detected Voltage
D1683
– 35 –
9V
D3.3V / A3.3V
5V
AUDIO_POW
D3.3V / A3.3V
5V
LVDS_P OW