Troubleshooting Guide; Power Does Not Turn On - JVC LT-22HG45E Service Manual

(LCD SECTION)

POWER DOES NOT TURN ON

Is F501 broken?
No
Is there voltage C502
305VDC?
Yes
Is there voltage at pin6
of IC501 21VDC?
Yes Yes
Is there voltage Q501
169VDC?
Yes
Is there voltage at pin5
of IC501 21VDC?
Yes
Is there voltage at pin 8
of IC501 169VDC?
Yes
Is there voltage at
pin1 of IC501 5.7VDC?
Yes
Change POWER PCB.

TROUBLESHOOTING GUIDE

Yes
No
No
Yes
Yes
No
No
Change F501.
Check D507, D508, D518, D510
and peripheral circuit.
Check IC501 and peripheral
circuit.
Change R510 and peripheral
circuit.
Check IC501 and peripheral
circuit.
Check D505 and peripheral
circuit.
Check R516, R534 and
peripheral circuit.