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Flow Chart of Troubleshooting
3-22
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Tx On
RF Input : 9750CH
Tx Power : 24dBm
No
Check
PAM101, VBAT
Check
PAM101, C143
Check
F101, R122
4
5
6
7
3-2-8. UMTS Tx
Nomal
Condition Catch
The Channel
RFS101 Pin #3
≥
20dBm ?
No
Check and change
RFS101
No
Yes
Check soldered status of
ANT, R127, C101, C104
Yes
Check soldered status of
C100, L100
No
Yes
PAM101
pin #1,27 : Low
pin # 28 : High
1
2
3
PAM101 pin #8
≥
20dBm ?
Yes
Check and change
U301
PAM101
pin #26
≥
3.7V
?
Yes
No
DUP101
pin #2
≥
20dBm ?
No
Yes
F101
pin #1
≥
20dBm ?
Yes
No
Check
PAM102
8