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4. TROUBLE SHOOTING
RX Trouble
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
U401
SW401
U103
FL401
TP1
TP2
TP3
TP4
TP5
TP6
Check TP1, TP2 of
SW401
with RF Cable
Signal is
OK ?
Replace
Mobile SW
(SW40)
Yes
No
Mobile SW & ASM is OK.
See next page
Yes
Replace SAW
Filter (FL401)
No
Check TP3,4 and 5,6 of
FL401 ?
TEST POINT
CHECKING FLOW
X101
* TP 3, 4 and 5, 6 outputs of
FL401 are balanced