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CHECKING FLOW
Check TP2& TP3
TP2(High Band),
TP3(Low Band)
Signal is OK ?
Control Signal is
(VLogic,TX EN, BS1,
BS2)OK ?
Check TP4 of U404 ?
TP1 Signal is OK?
TP5 signal same as
TP1?
Mobile SW & TX Module is OK.
LGE Internal Use Only
No
Yes
No
Yes
Yes
No
Yes
No
Yes
EGSM Tx
4. TROUBLE SHOOTING
Replace PMB8810 (U102)
Check PMB8810 (U102)
Replace TX Module (U404)
Replace SW401
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4. TROUBLE SHOOTING
Only for training and service purposes
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