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4.2.4 Checking Antenna Switch & Mobile Switch
SW401 Pin2
C433
C436
FL402
C422
C424
L403
For these 2 test case,
No Call connection is needed
Check SW401 Pin 1,2 with
RF Cable connected
Check SW401 Pin 1,2 with
No RF Cable connected
Check C433,C436
Check whether Ant SW set
as RX mode
Check RF Level of FL401
pin10 (for EGSM)
pin 1 (for DCS)
For this RF Level test case,
RX Stand alone Mode is
needed
Sw401 Pin1
figure 4-6
Open
Yes
Short
Yes
VC1 : Low
VC2 : Low
Yes
Pin 10 : ~ -62dBm
Pin 1 : ~ -63dBm
Yes
Ant SW & Mobile SW is OK
See Next page to check
Saw Filter
FL401
FL403
C426
C428
L404
No
Changing SW401
No
Changing SW401
No
Changing the
Board
No
Changing FL401
ANT SW
DCS TX
GSM TX
EGSM,DCS
RX
- 43 -
4. TROUBLE SHOOTING
ANT1
C401
1.5p
R401
5p
R401
5p
C402
NA
SW401
KMS-507
C411
22p
FL401
8
ANT
4
GND1
6
5
GND2
EGSM_TX
7
3
GND3
DCS_TX
9
GND4
12
GND5
13
10
GND6
EGSM_RX
14
1
GND7
DCS_RX
11 2
SHS-C090DR
ANT_SW2
C433
27p
ANT_SW1
C436
10p
Circuit Diagram 4-3
Table 4-2
VC1
VC2
L
H
H
L
L
L
GPO_11
GPO_9
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