4. TROUBLE SHOOTING
- 56 -
(5) Checking SAW Filter Circuit
Test Points
Checking Flow
Circuit Diagram
Figure 4-6
FL302
FL303
C331
1p
G1
2
G2
5
IN
1
3
O1
O2
4
FL303
EFCH1842TCA7
C327
1p
27nH
L303
C329
1p
C328
1p
6.8nH
L305
FL302
EFCH942MTCA7
G1
2
G2
5
IN
1
O1
3
O2
4
Check RF Level of
Saw Filter Input
For GSM : FL302.1
Check RF Level of
Saw Filter Output
For GSM : FL302.3
For DCS : FL303.3
FL302.1 : ~ -61dBm
FL303.1 : ~ -61dBm
FL302.3 : ~ -64dBm
FL303.3 : ~ -65dBm
Saw Filter is OK
See next Page to check
Rx IQ Signal
Yes
Yes
Yes
No
Check the parts are
well Soldered
For GSM : C326
No
No
Check the parts are
well Soldered
For GSM : L303,C327
For DCS : L305, C329
Changing
C326for GSM
Soldering is OK?
For the test,
RX Stand alone Mode is
needed. Refer to chapter 11
Changing
L303, C327 for GSM
L305, C329 for DCS
Changing
FL302 for GSM
FL303 for DCS
Содержание C1150
Страница 1: ...Service Manual Model C1150 Service Manual C1150 Date October 2005 Issue 1 0 ...
Страница 3: ......
Страница 94: ...5 DOWNLOAD AND CALIBRATION 95 11 Wait until Sending Block is completed 1 Wait Until Sending Block is completed ...
Страница 99: ...Note 100 ...
Страница 104: ... 105 8 PCB LAYOUT 8 PCB LAYOUT ...
Страница 105: ... 106 8 PCB LAYOUT ...
Страница 113: ...10 STAND ALONE TEST 114 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 117: ...Note 118 ...
Страница 119: ... 120 Note ...
Страница 135: ...Note 136 ...