TROUBLESHOOTING GUIDE
POWER DOES NOT TUNER ON
Is F501 broken?
Is there voltage at pin
4 of IC501 at 18.9V?
Is there voltage at pin
2 of IC504 at 3.3V?
Change F501.
Check IC501 and peripheral
circuit.
Change AV PCB.
No
Yes
Check IC504 and peripheral
circuit. Or change IC504.
No
No
Yes
Yes
Is there voltage at pin
2 of IC505 at 3.3V?
Check IC505 and peripheral
circuit. Or change IC505.
No
Yes
E-1