Sharp LC-20S5E-BK

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 chan
g
e IC504.
No
No
Yes
Yes
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