Gsm Power Amplifi Er Module; Only For Training And Service Purposes - LG GW520 Service Manual

4.4 GSM Power Amplifier Module
C553 3.3p
C552
12nH
L510 3.3nH
coil
C554
DNI
[Figure 4.4-1] Schematic Diagram of 2.5G PAM (TQM7M5005)
Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

U502
PGND
15
GND3
8
GND2
11
GND1
14
BY_CAP2
L509
9
18nH
BY_CAP1
13
GSM850_900_OUT
10
DCS_PCS_OUT
12
C555
C557
1.8p C556
TQM7M5005
0.01u
0.01u
SMPY0017901
[Table 4.4-1] SKY77340 Pin description
4. RF Circuit Technical Brief
GW520 service manual
VBAT
C542
33u
GSM850_900_IN
7
TX_EN
6
R512
VRAMP
5
10K
VBATT
4
BS
3
MODE_SELECT
2
DCS_PCS_IN
1
C558
47p
- 65 -
C548 C549
18p 47p
LBAND_IN
TXON_PA
PA_LEVEL
2G_BS
PA_MODE
HBAND_IN
LGE Internal Use Only