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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_STBY' line)
Is
the voltage to all lines
supplied?
Is
the voltage
to "5V_STBY" line
supplied?
Is
fuse (F601)
open?
Check:
Varistor (VA611), Diode Bridge (D603),
IC (IC1602, IC603), Thermistor (R609),
Diode (D1618)
Check: around
CPU (IC801), IC (IC802, IC1803),
Crystal (X801), Transistor (Q1609, Q1610,
Q1611, Q602, Q670), Diode (D1630,
D1633, D601, D670)
Check:
IC (IC1602,IC1604), Diode (D1607, D1608,
D1609, D1610, D1613, D1615, D1616,
D1620, D1629)