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CHECKING FLOW
Check TP1 of SW401
TP1 Signal is OK?
Check TP4 of U404 ?
Control Signal is
(BS1, BS2,BS3)OK ?
TP2(High Band),
TP3(Low Band)
Signal is OK ?
Mobile SW & TX Module is OK.
LGE Internal Use Only
No
Yes
Yes
No
Yes
No
Yes
EGSM Rx
4. TROUBLE SHOOTING
Replace Mobile SW (SW401)
Check PMB8810(U102)
Replace TX Module (U404)
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4. TROUBLE SHOOTING
Only for training and service purposes
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