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SAMSUNG Proprietary-Contents may change without notice
SGH-S300 Flow Chart of Troubleshooting and Circuit Diagram s
6-11
5. D C S T ransm itter
F1002 pin 13
about 2~ 3 dB m ?
F1002
pin 9 : 2.8 V ?
U 1001 pin 11
pin 3~ 4dBm ?
U 700,U 701
check & change
F 1002
check & change
C N 1001, C 1012
check & change
U 1001
pin 4 : 3.7 V ?
BA T T ER Y, U 100
check & change
U 1001
pin 5 : 3 V ?
U 1001
pin2,3:3V ?
U 1001
pin 6 : 1.2 V ?
U 1001 pin 1
about : -5dB m ?
U 1001
change & resolder
U 700
check & change
U 901
pin14,23,26,32 :
2.8V ?
U 901
pin9,10,12,13 :
-20dB m ?
U 902
pin 7 : 13M H z?
V p-p : 950m V
U 902
pin9,10,11,13 :
3V ?
U 901
change or resolder
U 901
pin5,6,7,8:
1.7V :
U 1001
check & change
U 700
change
U 100 pin46,C 114
change or resolder
U 700
check & change
U 100 pin39,c116
change or resolder
OSC 801
pin 3 : 13M H z?
V p-p : 950m V
O SC801
pin 4 : 3V ?
U 902
change or resolder
U 901
pin5,25,28 :
3V ?
U 100 pin39,c116
change or resolder
O SC801
change or resolder
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
C O N T IN U S T X O N C O N D IT IO N
M S T X level 12
C H : 698
RB W
: 100K H z
V BW
: 100K H z
SPA N : 10M H z
RE F LEV . : 10dB m
AT T . : 20dB