Lge Internal Use Only - LG -S367 Service Manual

CHECKING FLOW

LGE Internal Use Only

Check TP2& TP3
TP2(High Band),
TP3(Low Band)
Signal is OK ?
Yes
Control Signal is
(TP5, TP6, TP8,
TP9)OK ?
Yes
Check TP4 of U400 ?
Yes
TP1 Signal is OK?
Yes
SW400 signal
same as TP4?
Yes
Mobile SW & RF Module is OK.
Low Band(850/900) Tx
No
Replace PMB8815 (U100)
No
Check PMB8815
No
Replace RF Module (U400)
No
Replace SW400
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4. TROUBLE SHOOTING
Only for training and service purposes