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Flow Chart of Troubleshooting
3-19
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3-2-4. DCS 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 PAM400
pin 6 : 2.8V ?
PAM400 pin 1 :
about 4~5dbm?
No
Check PAM400
pin 16 : about 2~3
dbm?
No
Check and change
UCP201
,
UCP101
Yes
No
Yes
Check and
change
RFS400,C302,
L301,L302
Yes
U300
check & change
No
Battery,
PAM400
check & change
Yes
No
PAM400
check
Yes
No
Yes
No
UCP101
check
Yes
PAM400
change or resolder
U300 pin 2,3,22,23 :
100mV ?
No
UCP101
change or resolder
Yes
U300
change or resolder
PAM400 pin 7 :
3.7V ?
PAM400 pin 8 :
1.2V ?
PAM400 pin 12 :
about -5dbm?
PAM400 pin 6 :
3V ?
1
2
3
4
5
6
7
8
3