Trouble Shooting - LG Flatron M228WA Service Manual

Check 15V or
ST_5V of Power B/D.
Pass
Check Output of
IC1100(3.3V),
IC1101(1.8V)
Pass
Check Output of
IC1102(10.5V)
Pass
Check Output of
IC1104(2.5V)
IC1105(3.3V)
Pass
Check LED Assy.
Pass
Check P304 Connector.
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Only for training and service purposes
TROUBLESHOOTING GUIDE
1. NO POWER (LED INDICATOR OFF) : [A] Process
Fail
ST_5V of Power B/D.
Fail
Change IC1100, IC1101.
Fail
Fail
Change IC1104, IC1105.
Fail
Change LED Assy.
Check 15V or
Check short of
IC100, Q307.
Pass
Check short of
IC500.
Pass
Change IC1102
Check short of
IC100, IC400.
Pass
5V
- 19 -
Fail
Re-soldering of Change
defect part of IC100, Q307.
Fail
Re-soldering of Change
defect part of IC500,
Fail
Re-soldering of Change
defect part of IC100, IC400.
15V
LGE Internal Use Only