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Flow Chart of Troubleshooting
9-
19
9-2. RF
9-2-1. GSM Receiver
CONTINUOS RX ON
RF INPUT : 62CH
Cell power : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
C102 contact
NO
1
YES
F100 CHECK
pin13
≥
-65dBm?
RFS100
resolder or change
2
NO
YES
F100 CHECK
pin1,2
≥
-65dBm?
F100
resolder or change
NO
3
U103 CHECK
pin20,21
≥
-
65dBm?
YES
C116 C117, L105
resolder or change
NO
4
YES
U300 PIN A13, C314
resolder or change
NO
U103 CHECK
pin9,32 : 2.8V
5
6
YES
TCX100 CHECK
pin 4 : 2.8V
pin 3 : 13MHz
V p-p : 800mV
R114
resolder or change
U103 CHECK
R114
:13MHz
NO
NO
NO
YES
TCX100
change
U103
resolder or change
U103 CHECK
pin 1,2,3,4,5,6,7:
Vp-p 100mV
NO
END
GSM Receiver is ok?
GSM RX path component
resolder or change
NO
YES
8
Содержание SGH-X810
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Страница 56: ...Flow Chart of Troubleshooting 9 2 ...
Страница 67: ...Flow Chart of Troubleshooting 9 13 ...
Страница 76: ...Flow Chart of Troubleshooting 9 22 ...
Страница 80: ...Flow Chart of Troubleshooting 9 26 ...
Страница 82: ...Flow Chart of Troubleshooting 9 28 ...