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TROUBLESHOOTING FLOW CHARTS
NO POWER
No
No
Yes
Yes
Yes
(or the voltage to some lines is not supplied.)
After a few seconds, the set will be switched off.
Check 'Power Failure' Circuit.
No:
All 0V
(except '5V_ST' line)
Is
the voltage to all lines
supplied?
Is
the voltage
to "5V_ST" line
supplied?
Is
fuse (F601)
open?
Check:
Varistor (VA611),Power Unit
Check: around
CPU (IC801), IC (IC802,IC1803),
Crystal (X801), Transistor (Q801),
Power Unit
Check: Power Unit
Diode
D1605
Detected Voltage
D5V
D1606/D1607 D3.3V
D1603 12V_AMP
D1602 A9V
D1601 A5V
D1604 TU33V
Power Failure Line
CPU (IC801) 32pin
Q803-Q804
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