Filter
Top Products
- 66 -
LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
]\VXZZ
(2) Checking Mobile SW &FEM
4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
Figure 4.2.4
CONTROL LOGIC
EGSM Rx
VLOGIC
Tx_EN
BS1
BS2
TP1
TP2
TP3
TP4
BS2
BS1
TX_EN
VLOGIC
TXRAMP
Test point
TP1
10
R327
DNI
C359
1
03
U
21
11
10
9
8
7
31
6
4
1
5
51
4
61
3
71
2
18
1
19
20
21
22
23
GND_SLUG
VRAMP
TX_ENABLE
GPCTRL0
GPCTRL1
1DNG
VBATT
2DNG
2LRTCPG
BL_NIFR
9DNG
3DNG
8DNG
BH_NIFR
T
NA
4DNG
4XR
GND5
GND6
GND7
RX1
RX2
3XR
33p
C302
303C
p3
3
p
3
3
4
03
C
L301 3.3n 3.3nL302
22pC343
3.3nL303
1n
L308
1p
C305
869M894M,925M960MHz
FL301
SFSB0001803
105
63
72
94
81
IN_881_5 OUT_881_5
IN_942_5 OUT_942_5
GND1 GND2
GND3 GND4
GND5 GND6
L306 3.3n
C314
1.5p
C315
39p
10n
C316
C317
4.7u
1n
C318
1n
C319
DNI
C392
VBAT
C322
33p
1n
C323
1.8n
L320
L309
2.2n
33p
C325
1n
C326
1.8n
L319
1805M1880M,1930M1990M
FL302
SFSB0001903
105
63
72
94
81
IN_1842_5 OUT_1842_5
IN_1960 OUT_1960
GND1 GND2
GND3 GND4
GND5 GND6
4.7u
C327
L310
DNI
56pC306
22p
C396
9.1n
L305
27n
L312
22p
C398
VLOGIC
BS2
BS1
TX_EN
RX12
RX12X
RX34
RX34X
GSM_OUT
DCS_PCS_OUT
TX_RAMP
.
.
.
.
.
.
TP1