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(2) Checking Mobile SW &FEM
TEST POINT
TP3
TP2
CIRCUIT
VLOGIC
TX_RAMP
R401
1K
TX_EN
BS1
BS2
C400
C401
C402
1n
1n
1n
Register delete
EGSM
GSM850
PCS1900
DCS1800
TP1
SW400
C453
G2
ANT
RF
G1
6.8p
C435
L420
L417
0.5p
DNI
15n
Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP5
TP6
(BS1
(BS2)
)
VBAT
TP4
C403
C404
(10V,1608)
39p
1n
C408
C406
C407
10n
33p
4.7u
33
PGND3
32
PGND2
31
PGND1
10
1
GND5
GND1
11
30
RX1
VBATT
L400
3.3n
L401
SKY77547
12
29
RX2
U400
DCS_PCS_IN
13
28
3.3n
RX3
GND17
C455
14
27
RX4
GSM_IN
15
26
GND6
GND16
100p
16
25
GND7
GND15
L404
36
PGND6
35
1.5n
PGND5
34
PGND4
C420
1p
TP2
L407
RX34X
FL401
SFSB0001903
1.2n
1
8
IN_1842_5
OUT_1842_5
L409
L408
18n
2.2n
4
9
IN_1960
OUT_1960
L410
2
7
RX34
GND1
GND2
3
6
1.2n
GND3
GND4
5
10
GND5
GND6
1805M1880M,1930M1990M
TP
C441
RX12X
SFSB0001803
FL402
22p
1
8
IN_881_5
OUT_881_5
L412
L411
4
9
DNI
9.1n
IN_942_5
OUT_942_5
C442
2
7
GND1
GND2
RX12
3
6
22p
GND3
GND4
5
10
GND5
GND6
869M894M,925M960MHz
4. TROUBLE SHOOTING
TP7
TP8
(TX Ramp)
(VLOGIC)
TP1
Figure 4.2.4
CONTROL LOGIC
EGSM Rx
DCS_PCS_OUT
GSM_OUT
TP8 (VLOGIC)
TP9 (Tx_EN)
TP5 (BS1)
TP6 (BS2)
- 65 -
4. TROUBLE SHOOTING
TP9
(TX EN)
TP4
SW400
LGE Internal Use Only
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