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SAMSUNG Proprietary-Contents may change without notice
6-10
SGH-S300 Flow Chart of Troubleshooting and Circuit Diagram s
4. G SM
T ransm itter
F1002 pin 13
about 2~ 3dB m ?
F1002
pin 11 : 2.8V
U 1001 pin 9
pin 3~ 4dBm ?
U 700,U 701
check & change
F1002
check & change
CN 1001, C 1012
check & change
U 1001
pin 4 : 3.7 V ?
BA T T E RY , U 100
check & change
U 1001
pin 2 : 1.2 V
U 1001pin2:0
V and pin3:3V
U 1001pin 6:
1.2 V ?
U 1001 pin 7
: -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
OSC 801
pin 4 : 3V ?
U 902
change or
resolder
U 901
pin5,25,28
3V ?
U 100 pin39,c116
change or
resolder
OSC 801
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
CO N T IN U S T X ON
CO N D IT ION
M S T X level 19
CH : 62
RB W : 100K H z
V BW
: 100K H z
SPA N : 10M H z
REF LEV . : 10dB m
A T T . : 20dB