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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. TROUBLE SHOOTING
Fig 15 PAM circuit (U500)
5.14.3 FEM Circuit
See the 1.2.1 FEM Circuit.
PA_MODE
TX_RAMP
PA_BAND
NA
L503
1
R511
1
R514
3
BS
BY_CAP1
13
9
BY_CAP2
DCS_PCS_IN
1
12
DCS_PCS_OUT
GND1
14
11
GND2
8
GND3
GSM850_900_IN
7
GSM850_900_OUT
10
MODE_SELECT
2
PGND
15
6
TX_EN
VBATT
4
VRAMP
5
TQM7M5005
U501
VBAT
100p
C523
DNI
L504
100p
C507
R516
4.7nH
1
R509
1
R513
27p
C521
1000p
C520
R512
1.2K
22u
C506
C524
820p
C522
100p
TXLB
TXHB
PA_EN
PA_MODE
TX_RAMP
PA_BAND