SAMSUNG Proprietary-Contents may change without notice
SGH-E610 Flow Chart of Troubleshooting and Circuit Diagrams
2-
16
This Document can not be used without Samsung's authorization
2.RF
1. GSM Receiver
CONTINUOS RX ON
RF INPUT : 62CH
Cell power : -50dBm
NORMAL CONDITION
catch the channel?
F100 CHECK
pin13
≥
-65dBm?
F100 CHECK
pin1,2
≥
-65dBm?
U101 CHECK
pin20,21
≥
-65dBm?
CHECK
L104,L105,contact
NO
CN101
resolder or change
NO
F100
resolder or change
NO
C106,C109,L100
resolder or change
NO
YES
YES
YES
R103, C105
resolder
OSC101
change
U301 PIN A13, C311
resolder or change
U101
resolder or change
NO
YES
U101 CHECK
pin9,32 : 2.8V
U101 CHECK
R103:13MHz
YES
OSC101 CHECK
pin 4 : 2.8V
pin 3 : 13MHz
V p-p : 950mV
NO
NO
NO
U101 CHECK
pin 1,2,3,4,5,6,7:
Vp-p 100mV
YES
NO
END
GSM Receiver is ok?
GSM RX path component
resolder or change
NO
YES