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(3) Checking Mobile SW & FEM
TEST POINT
SW500.RF
VC_DCSPCS(VC1)
VC_EGSM(VC2)
CIRCUIT
TP500
TP501
TP502
R502
5.6nH
1.5p
C588
R588
2.2nH
SW500
KMS-506
C515
22p
GND13
PCS_RX2
24
GND12
PCS_RX1
23
GND11
DCS_RX2
22
GND10
DCS_RX1
21
GND9
EGSM_RX2
20
GND8
EGSM_RX1
19
GND7
18
GND6
17
GND5
16
GND4
7
GND3
DCSPCS_TX
6
GND2
EGSM_TX
4
GND1
2
FL500
HWXQ511
C540
C541
270p
270p
SW500
15
14
13
12
11
10
5
8
R516
0
ANT_SW1
R518
0
ANT_SW2
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4. TROUBLE SHOOTING
SW500.ANT
C541
C540
FL500
FL500.10
(C533)
FL500.12
(C533)
Waveform
FL301. 10
VC_DCSPCS
VC1
VC_EGSM
VC2
ANT SW Control GSM& DCS RX Mode
Graph 2
Select Mode
Vc(EGSM)
EGSM-Rx
LOW
EGSM-Tx
HIGH
DCS-Rx
LOW
PCS-Rx
LOW
DCS/PCS-Tx
LOW
Table 1
Low
Low
Low
Low
Low
Low
Vc(DCS/PCS)
LOW
LOW
LOW
LOW
HIGH
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