A SERVICE OF

logo

SAMSUNG Proprietary-Contents may change without notice
SGH-i300 Flow Chart of Troubleshooting and Circuit Diagrams
2-17
This Document can not be used without Samsung's authorization
2-11. EGSM Receiver
Continuous RX on
RFinput : 62CH AMP :
-50dBm
Yes
Normal
Condition catch
the channel?
No
Check soldered status
of C933,L901
Yes
F903 check
pin6 = -65dBm
No
ANT902 resolder or
change
Yes
F903 check
pin 10,11 = -65dBm
No
F903 resolder or
change
Yes
U902 check
pin 20.21 = -65dBm
No
C924, C925, L903
resolder or change
U902 check
pin 8 = 13M ?
Vp-p : 860mV
TCX701 check
pin3 = 13M ?
Vp-p : 950mV
TCX701 check
pin 4 = clean 3V?
U701 pin B10, C709,
C710
check or resolder
No
No
U902 check
pin 9,32
clean 2.8V
U902 check
pin 1,2
Vp-p:250mV
U902 check
pin 1,2,3,28
Vp-p=100mV
No
No
No
C726, R705
check or resolder
TCX701 change or
resolder
U701 pin A13, C712
Check or resolder
U902 check or resolder
U902 check or resolder
Check U701
Yes
Yes
Yes
Yes
No
Yes Yes