LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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Check TP1
If GSM over 31 dBm ?
If DCS/PCS over 28 dBm ?
Check soldering and
components
Start
Check TCXO Block
Refer to 1.3
Check TP4, 5
If GSM(TP4) is about 5 dBm ?
If DCS/PCS(TP5) is about 6 dBm ?
Change the board
GSM/DCS/PCS
Tx is OK
Check other part
RTR is no problem
Check other part
No
Yes
No
Yes
Check RTR & PAD
No Problem
Still exist Problem
No
Check TP2, 3
If GSM(TP2) under 31 dBm ?
If DCS/PCS(TP3) under 28 dBm ?
FEM is no problem and
Check EDGE PAM
Refer to 1.4
Yes