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4. TROUBLE SHOOTING
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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
Check TP1 of SW400
TP1 Signal is OK?
Replace Mobile SW (SW400)
Yes
No
Yes
Mobile SW & RF Module is OK.
Check PMB8815
Control Signal is
(TP5, TP6, TP8)
OK ?
No
Yes
Check TP4 of U400 ?
Replace RF Module(U400)
TP2(High Band),
TP3(Low Band)
Signal is OK ?
No
Yes