Table of Contents
Advertisement
4.3.6 Checking Antenna Switch & Mobile Switch
Figure 4-15
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)
For the test,
TX Stand alone Mode is needed.
Refer to chapter 00 (PL=7 for
GSM, PL=2 for DCS)
No
Check VC1, VC2
Yes
No
Pin5 : ~29.5dBm
Pin 3 : ~26.5dBm
Yes
No
Open
Yes
No
Short
Yes
END
- 49 -
4. TROUBLE SHOOTING
SW400
KMS-507
C410
22p
SHS-C090DR
FL400
4
GND1
6
GND2
EGSM_TX
7
GND3
DCS_TX
9
GND4
12
GND5
13
GND6
EGSM_RX
14
GND7
DCS_RX
Changing board
Go to 4.3.5 Checking
PAM control signal
ANT SW
Changing SW400
DCS TX
EGSM TX
Changing CN401
EGSM, DCS RX
5
3
10
1
ANT_SW2
C430
C431
10p
27p
ANT_SW1
C433
C434
3.3p
10p
Table 4-3.
VC 1
VC2
0
1
1
0
0
0
Advertisement
Table of Contents
