Troubleshooting - LG TH-20LA60PS Service Manual

No power
Check Power S/W
of Control Key B/D
Check Output of
IC1004, IC1005(Main B/D)
Pass
Check LED Assy
Pass
Check P903A Connector
Ref.1 15V : CN201B #10, 11

TROUBLESHOOTING

:[A]Process
Ref.1
Check 15V or ST_ 5V
of Power B/D
Pass
Pass
Check IC 1004, IC1005
PIN 7 LEVEL(High 3.3V)
Fail
Pass
Change IC1004 , IC1005
or check short of main B/D
Change LED Assy
Fail
Ref.1 ST_5V : CN201B #6, 7
- 13 -
Check short of main B/D
or Change Power B/D
Fail
Change VCTi(IC200)
Of Main B/D
Fail