Troubleshooting Flow Charts - Sanyo DP19640 Service Manual

TROUBLESHOOTING FLOW CHARTS

NO POWER
Is fuse
open?
Is "POWER_5V"
supplied?
the voltage to
all lines
supplied?
Check 'Power Failure' Circuit.
4,
D1600
7
D1601
8,
D1602
YES
NO
YES
Is
All 0V (except
'POWER_5V' line)
(or the voltage to some lines is not supplied.)
YES
After a few seconds, the set will be switched off.
POWER_5V
POWER_FAIL0
P12V
POWER_FAIL0
P14V
POWER_FAIL0
Check: Power Unit
NO
Check: Power Unit
Check: arround 3.3V-
NO
STB(IC1603), CPU(IC5500),
Reset(IC5900),
Crystal(X5500),Power Unit.
Diode Detected Voltage
D1600
D1601
D1602
-36-
5V
12V
14V