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SAM SUNG Proprietary-C ontents may change without notice
SGH-I700 Flow Chart of Troubleshooting
2-17
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12. EGSM Transmitter
F1001 pin
12 : about
2~3 dBm?
CN703, C1038
check&change
F1001
pin13 : 2.8 V?
U901
check & change
Between
F1001&C1043:
≒4~5dBm?
F1001
check & change
C1031 :
3.7V?
NO
NO
YES
YES
YES
NO
NO
BATTERY, U701
check & change
Between
R1008 & U1004 :
1.2V?
YES
NO
R1008
check & change
R1031:
≒-5dBm?
YES
C1033 : 3V?
YES
YES
U1004
change
NO
U901
check
U901
check & change
YES
NO
U1002
pin14,23,26,32 :
2.8V ?
U701 pin39,C110
change or resolder
YES
U1002
pin9,10,12,13
:-20dBm ?
U1002
pin5,6,7,8 :1.7V
?
YES
U901
change
NO
NO
U1004
change or
resolder
YES
U1003 pin5,25,28
:3V ?
NO
U701 pin33,C724
change or resolder
NO
U1003
pin 7 : 13MHz?
Vp-p: 950mV
YES
U1003
pin9,10,11,1
2,13: 3V?
YES
YES
U1002
change or
resolder
OSC901
pin 3 : 13MHz?
Vp-p : 950mV
OSC901
change or
resolder
U901
check or
change
OSC901
pin 4 : 3V ?
U701
pin33,C109
change or
resolder
U1003
change or
resolder
NO
NO
YES
NO
YES
NO
CONTINUS TX ON CONDITION
TX POWER DAC:500 CODE
APPLIED
CH:62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
NO