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SAMSUNG Proprietary-Contents may change without notice
SGH-I300 Flow Chart of Troubleshooting and Circuit Diagrams
2-18
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2-12. EGSM Transmitter
Yes
Yes
Yes
Yes
Continuous TX on
CONDITION TX
POWER
DAC500 CODE
APPLIED
CH62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz REF
LEV : 10dBm ATT :
20dB
U701 check
or change
F903 pin3
about 2-3dBm?
U701 check
or change
ANT902, C932
check or
Between
F903,C920
4~5dBm?
C904:3.7V
Battery,U701
check or
change
F903 check
or change
Between
F901,U901
1.2V?
F903 check
or change
U902 pin9,
32=2.8V?
U902 pin4,
5,6,7=1.7V?
TCX701
pin3 : 13MHz?
Vp-p:950mV
U701
pinA13,C712
cgange or
resolder
U902 pin
8:13MHz?
Vp-p:950mV
U902 pin
10,12,13,14
=3V?
TCX701
Pin4:3V?
U901
change
or resolder
U701
change
or resolder
U902
change
or resolder
U902
change
U701 pin
B10,C709,C71
0
change or
resolder
TCX701 check
or resolder
F903
pin4=2.8V?
Yes
No No
Yes
No
Yes
No
Yes
No
No
Yes
No
Yes
Yes
No
No
No
No
No