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(4) Checking RX IQ
4. TROUBLE SHOOTING
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TEST POINT
CIRCUIT
WAVEFORM
C425
C427
U401
C427
1.5p
C426
1.5p
5.6nH
L403
C423
2p
XMODE
XTAL1
30
XTAL2
RESET
RFIDP
22
RFIEN
21
RFIEP
18
RFIPN
17
RFIPP
RFOH
16
15
RFOL
12
VDD1
VDD2
13
28
VDD3
VDD4
29
VIO
11
XDIV
26
25
AFC
27
14
GND
24
RFIAN
23
RFIAP
20
RFIDN
19
U401
SI4210
C428
12p
C425
1.8p
L404
6.8nH
CHECKING FLOW
Redownload software and calibration again
Similar?
No
Replace U401
Yes
No
Check C425,C427.
Check if there is any
Major difference
Refer to graph 4-3
Figure 4-5 (a). RX IQ Circuit
Figure 4-5 (b). RX IQ Circuit
Graph 3
Содержание KG240
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model KG245 Service Manual KG245 ...
Страница 3: ... 4 ...
Страница 81: ...4 TROUBLE SHOOTING 82 4 13 KEY backlight Trouble TEST POINT Figure 4 20 a KEY Backlight Trouble ...
Страница 90: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Download Procedure 5 2 1 Computer Program file MultiGSM exe Click ...
Страница 92: ...5 DOWNLOAD AND CALIBRATION 93 5 2 3 Configuration Setting C GSMULTI Model MG210 dll ...
Страница 93: ...5 DOWNLOAD AND CALIBRATION 94 5 2 4 Press Start Button KG245 ...
Страница 94: ...5 DOWNLOAD AND CALIBRATION 95 5 2 5 After Start Button Which Stand by condition KG245 ...
Страница 95: ...5 DOWNLOAD AND CALIBRATION 96 5 2 6 SW downloading Condition KG245 ...
Страница 96: ...5 DOWNLOAD AND CALIBRATION 97 5 2 7 SW downloading END Condition KG245 ...
Страница 99: ...5 DOWNLOAD AND CALIBRATION 100 4 Click on CALIBRATION START button KG245 KG245 ...
Страница 100: ...5 DOWNLOAD AND CALIBRATION 101 6 BLOCK DIAGRAM ...
Страница 101: ... 102 ...
Страница 110: ... 111 8 PCB LAYOUT ...
Страница 111: ... 112 8 PCB LAYOUT ...
Страница 112: ... 113 KG245 8 PCB LAYOUT ...
Страница 113: ... 114 KG245 8 PCB LAYOUT ...
Страница 121: ...10 STAND ALONE TEST 122 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 125: ... 126 ...
Страница 127: ... 128 ...
Страница 145: ...Note ...
Страница 146: ...Note ...