Troubleshooting Guide - Sharp LC-26AD22U Service Manual

(LCD SECTION)
POWER DOES NOT TUNER ON
Is F401 broken?
No
Is there voltage at pin
1 of IC402 6V?
Yes
Is R412 broken?
No
Is there voltage at pin
10 of IC401 19V?
Yes
Change DIGITAL PCB.

TROUBLESHOOTING GUIDE

Yes
No
Yes
No
E-1
Change F401.
Check IC402 and peripheral
circuit.
Change R412.
Check IC401 and peripheral
circuit.