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NO POWER
(POWER INDICATOR OFF)
Check P204Voltage
Pin5, Pin6 (5V)?
IC203 Pin2 Voltage
Check Key Control
Connector Routine
Pin75 (3.3V)
Check IC100 Pin 96
1
Check IC100
Waveforms
1
IC100-#96
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLESHOOTING GUIDE
1. NO POWER
YES
Check
(3.3V) ?
YES
Is IC100
Voltage ?
YES
Pulse
YES
NO
NO
NO
NO
- 14 -
Check Power Board,
And Find Out a Short Point
as Opening
Each Power Line
Check 3.3V Line
(Open Check)
No Problem
Check 3.3V Line
Check X-TAL
LGE Internal Use Only
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