Dcs/Pcs Transmitter - Samsung SGH-E620 Service Manual

2-13. DCS/PCS Transmitter

Check F700
pin 8 : about
2~3 dbm?
Yes
Check and
change
1
CN702, C715
U701 pin 43,42
3.7V ?
U701 pin 22 :
1.2V ?
U701 pin 5 :
about -5dbm?
U701 pin2 :
U701
change or resolder
No
Check F700
pin 9 : 2.8V
?
Yes
No
U701 pin31 :
about 4~5dbm?
Yes
F700
check & change
No
:
Yes
No
Yes
No
Yes
No
U100
3V ?
Yes
SGH-E620 Flow Chart of Troubleshooting
No
Check and
change
U100,U200
2
3
Battery, U100
4
check & change
U100 check
5
check
6
U700 pin 9 :
2.8V ?
Yes
U700
change or resolder
2-27
CONTINUS TX ON CONDITION
TX POWER DAC : 560 CODE
APPLIED
CH : 698CH(DCS),
660CH(PCS)
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
1
3
7
2
4
6
2
5
8
No
U100
change or resolder
8
7