Troubleshooting Flow Charts - Sanyo DP42848 Service Manual

NO POWER
Trouble Shooting Video US1H(42/46)
Check 'Power Failure' Circuit.
Power Failure Line

TROUBLESHOOTING FLOW CHARTS

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.
CPU (IC800) 32pin
Q810, Q811
CPU (IC800) 23pin
Yes
Check: Power Unit
No
Check: Power Unit
All 0V
No:
(except '5V_STBY' line)
Check: arround
CPU (IC800), IC (IC801),
Crystal (X801), Power Unit
Diode Detected Voltage
D1671
D6051/D6052
D1620/D1621
D1663
D1677
Diode Detected Voltage
D1683
— 39 —
9V
A3.3V
D3.3V
5V
AUDIO_POW
LVDS_POW