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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
ʹΠΡΪΣΚΘΙΥ͑ι ͣͨ͑͡͡ͽ͑ͶΝΖΔΥΣΠΟΚΔΤ͑͟ͺΟΔ͑͑͟ͲΝΝ͑ΣΚΘΙΥ͑ΣΖΤΖΣΧΖΕ͑͟
ΟΝΪ͑ΗΠΣ͑ΥΣΒΚΟΚΟΘ͑ΒΟΕ͑ΤΖΣΧΚΔΖ͑ΡΦΣΡΠΤΖΤ
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
]\VX[W
4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
Figure 4.3.4
CONTROL LOGIC
TP4 TP5
TP6 TP7
TP8
VRF
PA_EN
BS1
BS2
EGSM Tx
VRF
PA_EN
BS1
BS2
SIM2
SIM1
(2) Checking Mobile SW & TX Module
TP8(VRF)
TP4(APC)
TP1
TP9(VBAT)
TP7(BS2)
TP5(PA_EN)
TP11
TP6(BS1)
TP2(High)
TP3(Low)
C336
220p
C324
6p
C334
6p
C327
10K
R319
18K
R301
33p
C345
DNI
C325
1K
R302
33p
C346
DNI
C316
C326
10u
VRF
33p
C329
22p
C332
SKY77547
U303
34
35
36
16
15
14
13
12
11
10
31
32
33
71
9
81
8
91
7
02
6
12
5
22
4
32
3
42
2
25
26
27
28
29
30
1
GND1
VBATT
DCS_PCS_IN
GND17
GSM_IN
GND16
GND15
CI
G
OL
V
41
D
N
G
P
M
A
R
V
31
D
N
G
N
E_
XT
21
D
N
G
1
S
B
11
D
N
G
2
S
B
01
D
N
G
2
D
N
G
9
D
N
G
3
D
N
G
8
D
N
G
4
D
N
G
T
N
A
PGND3
PGND2
PGND1
GND5
RX1
RX2
RX3
RX4
GND6
GND7
PGND6
PGND5
PGND4
VBAT
22p
C333
BAND_SW2
PA_EN
BAND_SW1
APC
GSM_OUT
DCS_PCS_OUT
DNI
DCS
PCS
GSM850
EGSM
TP4 TP5 TP6 TP7
TP8
Содержание LG-A155
Страница 1: ...Service Manual Model LG A155 Internal Use Only Service Manual LG A155 Date October 2010 Issue 1 0 ...
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