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Flow Chart of Troubleshooting
9-19
Check and change
RFS400,
C408, L402, L403
4
1
3
2
2
4
5
6
7
8
9-2-4. DCS/PCS Tx
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
Check U400
pin 6 : 2.8V ?
U401 pin 1 :
about 4~5dbm?
No
Check U400
pin 16 : about
2~3 dbm?
No
Check and change
U100
,
UCP200
Yes
No
Yes
Yes
U400
check & change
No
Battery,
U100
check & change
Yes
No
U400
check
Yes
No
Yes
No
U100
check
Yes
U401
change or resolder
U400 pin 12,13,28,
29 : 2.9V ?
No
U100
change or resolder
Yes
U400
change or resolder
U401 pin 7 :
3.7V ?
U401 pin 8 :
1.2V ?
U401 pin 12 :
about -5dbm?
U401 pin 6 :
3V ?
1
2
3
5
6
7
8