Sanyo DP19640 - Troubleshooting Flow Charts

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