LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 99 -
- UMTS Tx/Rx
- GSM900 Tx
- DCS1800/PCS1900 Tx
- GSM Rx / PCS1900 Rx
Logic Table of the FEM
Vc3
Vc2
Vc1
Vdd
GSM900 Tx
L
H
H
H
DCS1800/PCS1900 Tx
L
L
H
H
UMTS Tx/Rx
H
L
H
H
GSM 900 Rx
L
L/H
L
H
DCS 1800 Rx
H
L/H
L
H
PCS 1900 Rx
L
L/H
L
H
TP2 (Vc2)
TP3 (Vc3)
TP1 (Vc1)
TP2 (Vc2)
TP3 (Vc3)
TP1 (Vc1)
TP2 (Vc2)
TP3 (Vc3)
TP1 (Vc1)
TP2 (Vc2)
TP3 (Vc3)
TP1 (Vc1)
Содержание U990
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