LG GW520 - Page 110

- 111 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. Trouble shooting
GW520 service manual
Table 1.
Test Point Net name Description
TP4 PA_LEVEL Power Amp Gain Control. Typically, 0.2 ~1.6V
TP5 VBAT PAM Supply Voltage (Vcc > 3V)
coil
10K
R512
3.3nHL510
VBAT
C553
3.3p
47p
C549
47p
C558
7
GSM850_900_IN
10
GSM850_900_OUT
2
MODE_SELECT
PGND
15
TX_EN
6
4
VBATT
5
VRAMP
TQM7M5005
SMPY0017901
U502
BS
313
BY_CAP1
BY_CAP2
9
1
DCS_PCS_IN
12
DCS_PCS_OUT
14
GND1
GND2
11
GND3
8
C554
DNI
C555
1.8p
0.01u
C557
C552
12nH
33u
C542
L509
18nH
C556
0.01u
C548
18p
LBAND_IN
2G_BS
TXON_PA
PA_MODE
PA_LEVEL
HBAND_IN
GND4
IN
1
2
OUT
SW500
ENWY0001801
MM8430-2610RB3
GND1
3
GND2
4
5
GND3
6
L50
3
NA
TP1
TP5
TP4
TP2
TP3