LG GB220 - Page 67

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
(2) Checking Mobile SW &FEM
TX RampTX EN
TP1
BS1
BS2
VLOGIC
TP2 TP3
TP4
Figure 4.2.4
EGSM Rx
VLOGIC
Tx_EN
BS1
BS2
RX_BAND SWAPPED
m
KMS512 080812 Jeno
RX_BAND SWAPPED
1
R414
INPUT1
4
INPUT2
OUTPUT1
8
9
OUTPUT2
SFSB0002302
B9508FL402
2
C_GND1
C_GND2
3
C_GND3
5
10
C_GND4
GND1
6
7
GND2
1
R408 110
13
RX3
RX4
14
4
TX_EN
VBATT
30
2
VLOGIC
VRAMP
3
GND3
8 9
GND4
GND5
10
15
GND6
GND7
16
18
GND8
19
GND9
27
GSM_IN
31
PGND1
PGND2
32
33
PGND3
PGND4
34
35
PGND5
PGND6
36
11
RX1
RX2
12
ANT
17
5
BS1 BS2
6
29
DCS_PCS_IN
1
GND1
GND10
20 21
GND11 GND12
22
GND13
23
GND14
24
25
GND15
GND16
26
GND17
28
GND2
7
U400
SKY77531
SMRH0005201
1000p
C410 C412
1000p
1KR403
2
C_GND1
C_GND2
3
C_GND3
5
10
C_GND4
GND1
6
7
GND2
1
INPUT1
4
INPUT2
OUTPUT1
8
9
OUTPUT2
FL401 B9509
SFSB0002301
R406 110
R405 110
DNI
C425
1000p
C409 C411
39p
R402 110
C408
1000p
VLOGIC
BS2
TX_RAMP
BS1
TX_EN