Only For Training And Service Purposes - LG TU550 Service Manual

TP* ; UMTS 850 RX PATH
TP*'; UMTS 1900 RX PATH
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Set the Phone Rx is ON
Check bias1/
bias1' Over
2V?
Yes
Check TP1
Signal exist?
Check TP2/TP2'
Signal exist?
Check TP3/TP3'
Signal exist?
Check TP4/TP4'
Signal exist?
Rx is OK
Check other Parts
4. TROUBLE SHOOTING
No
Check vias
block solding
Check
No
ANT100
No
Check ANT. SW
Module U100
No
Check Duplxer
FL106/FL107
Check
No
RFL6202 and
FL109/FL110
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LGE Internal Use Only