User Guide

SGH-E620 Flow Chart of Troubleshoo ting
2-26
2-12. GSM Transmitter
Check F700
pin 10 : about
2~3 dbm?
Check F700
pin 11 :
2.8V ?
Check and
change
CN702, C715
Yes
Check and
change
U100,U200
No
CONTINUS TX ON CONDITION
TX POWER DAC : 554 CODE
APPLIED
CH : 62ch
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
U701 pin6 :
about 4~5dbm?
Yes
No
Yes
U701 pin 8,20
:
3.7V ?
F700
check & change
No
Battery, U100
check & change
Yes
U701 pin 22 :
1.2V ?
No
U100 check
Yes
U701 pin12 :
3V ?
No
U100 check
U700 pin 9 :
2.8V ?
U701
change or resolder
U100
change or resolder
No
Yes
U700
change or resolder
Yes
U701 pin 6 :
about -5dbm?
No
Yes
No
1
2
3
4
5
6
7
8
1
2
2
3
4
5
6
7
8