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