Samsung SGH-U700 Service Manual page 39

3-2-8. UMTS Tx
Tx On
RF Input : 9750CH
Tx Power : 24dBm
Nomal
Condition Catch
The Channel
Yes
RFS101 Pin #3
≥ 20dBm ?
No
PAM101 pin #8
≥ 20dBm ?
No
PAM101
pin #1,27 : Low
pin # 28 : High
Yes
PAM101
pin #26 ≥ 3.7V
?
No
DUP101
pin #2 ≥
20dBm ?
No
F101
pin #1 ≥
20dBm ?
No
Check PAM102
SAMSUNG Proprietary-Contents may change without notice
No
Yes
Yes
No
Yes
Yes
Yes
8
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Check soldered status of
ANT, R127, C101, C104
Check and change
RFS101
Check soldered status of
C100, L100
Check and change
U301
Check PAM101, VBAT
Check PAM101, C143
Check F101, R122
3-22
Flow Chart of Troubleshooting
1
2
3
4
5
6
7