Samsung SGH-i320 User Manual Page 73

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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
10-24
This Document can not be used without Samsung's authorization
10-2-2. EGSM Transmitter
Continuous TX on
CONDITION TX POWER
DAC500 CODE APPLIED
CH62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz REF
LEV : 10dBm ATT :
20dB
UCD701 check
or change
No
No
F901
pin11=2.8V?
F901 pin10
about 2-3dBm?
RFS901,C933,L901
check or change
No
No
No
NoNo
Yes
Yes
No
Yes
No
No
Yes
No
Yes
No
Yes
Yes
TCX901 check
or resolder
UCD701 pin
A13,C735
change or
resolder
U903 change
or resolder
U903 change
or resolder
UCD701
change
or resolder
PAM901
change
or resolder
TCX901
Pin4:3V?
U903 pin
32,33
=3V?
UCD701
pinA13,C735
cgange or resolder
TCX901
pin3 : 26MHz?
Vp-p:1V
F901 check
or change
Between
F901,PAM901
1.2V?
Between
F901,C923
4~5dBm?
Yes Yes
Yes
Yes
U903 pin
35:26MHz?
Vp-p:860mV
U903
pin25,26,27,28=
1.7V?
U903
pin1,8,31,36,41=
2.8V?
UCD701
check or
change
Battery,UCD701
check or change
F901 check
or change
TA902:3.7V
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