Samsung SGH-i320 User Manual Page 76

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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
10-27
This Document can not be used without Samsung's authorization
10-2-5. DCS, PCS Transmitter
Continuous TX on
CONDITION
CH:698CH(DCS)
CH:660CH(PCS)
TX POWER CODE :
350CODE APPLIED
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz REF
LEV : 10dBm ATT :
20dB
U903 pin
35:26MHz?
Vp-p:860mV
UCD701 pinA13,C735
change or resolder
TA902:3.7V
UCD701
check
or change
No
No
No
No
Yes
Yes
No
Yes
No
No
Yes
No
Yes
No
Yes
No
No
Yes
F901
pin2=2.8V?
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?
TCX901
pin3 : 26MHz?
Vp-p:1V
U903
pin25,26,27,28
=1.7V?
U903
pin1,8,31,36,41
32=2.8V?
F901 check
or change
Between
F901,PAM901
1.2V?
F901 check
or change
Battery,UCD701
check or change
Between
F901,C924
4~5dBm?
RFS901,C933,
L901
check or change
UCD701 check
or change
F901 pin10
about 2-3dBm?
Yes
Yes
Yes
Yes
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