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4.2.5 Check SAW Filter
C510
27p
W h e n d o t h e s e t w o
test, standalone mode
should be applied
Check the SAW filter
Iutput
For GSM：FL401.3
For DCS：FL402.3
Check the SAW filter
Output
For GSM：FL401.3
For DCS：FL402.3
SAW filer is OK, Refer
n e x t p a g e f o r I Q
signal checking
Figure 4-5
FL501
3
2
1
1
1
IN G
O
EFCH942MTCA7
2
2
G
O
5
4
FL502
2
3
1
1
G
O
1
IN
2
2
G
O
EFCH1842TCA7
5
4
C h e c k
s o l d e r i n g I s
Ok?
C510（for GSM）
No
FL401.1:
~-61dBm
Check the soldering
Is Ok?
Yes
For GSM：L501,C513
For DCS：L503,C52
No
FL401.3:~-64dBm
FL402.3:~-64dBm
Yes
11
4. TROUBLE SHOOTING
1p
C513
1p
C518
1p
C521
1p
C522
t h e
Change C510 (For
GSM)
The SAW
soldering Is
Ok？
No
Change
For GSM：L501,C513
For DCS：L503,C521
L501
27nH
L503
6.8nH
Change
Yes
FL401(GSM)
FL402(DCS)
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