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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
LGE Internal Use Only
Micro SD Card will
work properly
Micro SD Detect
OK?
START
Re-attach or
Replace CN103
NO
YES
T3 IS =HIGH?
NO
YES
Re-download SW
YES
Replace Micro SD Card
CHECKING FLOW
YES
NO
IF TP1=LOW,
Change U106
Check the TP1=2.8V,
TP4=2.93V?
TF_DET(TP2)
Is High?
R131,R132,R133,
R134,R135,R136
YES
NO
IF TP4=LOW,
Change U103
Is Micro SD Card
Worked properly?
Is Micro SD Card
Worked properly?
NO
NO
Is Micro SD Card
Worked properly?
NO
YES
YES
YES