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4. TROBULE SHOOTING
4.3.6 Checking Antenna Switch & Mobile Switch
Figure 4-15
For the test,
TX Stand alone Mode is needed.
Refer to chapter 11 (PL=7 for
GSM, PL=2 for DCS)
Check L405, L404
Check whether Ant SW
Set as TX mode
? Refer to Graph 4-14,15
? Refer to Table 4-3
Check RF Level of
FL400 Pin 5 (for GSM)
& Pin 3 (for DCS)
Check SW400.ANT, RF
with RF Cable connected.
Check SW400.ANT,RF
with RF Cable disconnected
SW400.ANT
SW400.RF
FL400.5
FL400.3
L405 (VC1)
L404
(VC2)
No
Check VC1, VC2
Yes
Pin5 : ~29.5dBm
No
Pin 3 : ~26.5dBm
Yes
No
Open
Yes
No
Short
Yes
END
SW400
SHS-C090DR
4
GND1
6
GND2
7
GND3
9
GND4
12
GND5
13
GND6
14
GND7
Changing board
Go to 4.3.5 Checking
PAM control signal
Changing S S W W 4 4 0 0 0 0
Changing S S W W 4 4 0 0 0 0
- 50 -
KMS-507
C410
22P
FL400
5
EGSM_TX
3
DCS_TX
EGSM_RX
10
DCS_RX
1
C430
C431
10p
27p
C433
C434
3.3p
10p
Table 4-3
ANT SW
VC1
D D C C S S T T X X
0
E E G G S S M M T T X X
1
EGSM, DCS RX
0
ANT_SW2
ANT_SW1
VC2
1
0
0
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