LG M6100 Service Manual - Page 60
TEST POINT, CIRCUIT, Waveform
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(2) Checking FEM & Mobile SW TEST POINT 4. TROUBLE SHOOTING CIRCUIT ANT_SW3 ANT_SW2 ANT_SW1 Waveform C505 27p C506 27p C507 27p FL501 VC3 12 VC2 9 VC1 11 GSM1900_RX GSM1800_RX 6 4 GSM900_RX 2 GND7 16 GND6 15 GND5 14 GND4 GSM18001900_TX 7 GND3 GSM900_TX 8 5 10 GND2 3 1 GND1 LMSP54LA-445TEMP DCS_PCS_TX GSM900_TX FEM Control GSM& DCS Graph 4-3(a) ANT 13 FEM Control PCS Graph 4-3(b) - 61 -
4. TROUBLE SHOOTING
- 61 -
(2) Checking FEM & Mobile SW
8
GSM1800_RX
4
GSM1900_RX
6
GSM900_RX
2
GSM900_TX
10
VC1
11
9
VC2
12
VC3
13
ANT
1
GND1
GND2
3
5
GND3
7
GND4
GND5
14
15
GND6
GND7
16
GSM18001900_TX
27p
LMSP54LA-445TEMP
FL501
C505
C507
27p
C506
27p
ANT_SW3
ANT_SW2
ANT_SW1
GSM900_TX
DCS_PCS_TX
FEM Control GSM& DCS
Graph 4-3(a)
FEM Control PCS
Graph 4-3(b)
TEST POINT
CIRCUIT
Waveform