Troubleshooting Guide; Power Does Not Tuner On - Sharp LC-20AD5E-BK Service Manual

POWER DOES NOT TUNER ON

Is F501 broken?
No
Is there voltage at pin
10 of IC501 at 18.9V?
Yes
Is there voltage at pin
2 of IC503 at 5V?
Yes
Change MAIN PCB.

TROUBLESHOOTING GUIDE

Yes
No
No
E-1
Change F501.
Check IC501 and peripheral
circuit.
Check IC503 and peripheral
circuit. Or change IC503.