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5-11 GSM Receiver
RF input : CH center freq. + 67.7 kHz
SGH-N600 Flow chart of trouble shooting
Rx On
Amp. : -50 dBm
U312
No
Pin 8
Yes
U312
No
Pin 10
Yes
F301
No
Pin 1
Yes
F302
No
Pin 1
U307, C347, C351, L311
Yes
U307
No
Pin 53, 54
Yes
U307
No
Pin 49, 50
(225 MHz)
Yes
U307
No
Pin 43, 44
(45 MHz)
Yes
U307
No
Pin 24, 25, 26, 27
Yes
Check U317
No
Yes
Resolder
U117
Check IF connector
- > resolder
Resolder &
U312 Pin 10
Yes
Resolder
F301, C378, L319
Resolder
Resolder
F302, C344, L307
Check
C321(CH+225MHz)
C348(1080MHz)
Yes
Resolder
F303, C324, C327,
L305, C326
Resolder
OneC(U117), U307
Resolder
U307 (Pin32, 33, 35)
Check
No
VC1 : L
VC2 : L
No
Resolder
U306
5-20
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