Samsung GT-S5230 - DCS;PCS Transmitter

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Flow Chart of Troubleshooting
9-22
9-15.
DCS
/
PCS Transmitter
④
TX
ON
(5
Level)
①
Yes
U100
Pin
17
≥
-65
dBm
No
Resolder U100
,
L105, C116
Yes
Check ANT Switch
control circuit
U100 pin
11
≥
-30
dBm
Check
U100
pin
10 =H (2.6
V)
pin
16 = L
No
No
②
Change or Resolder
U100
Yes
③
PAM100 pin1
5
≥
-30
dBm
Yes
No
Resolder or Change C124, C125,
C126
Yes
Check PAM100 pin
1,
2,3,20, V
BAT OK?
PAM100 pin
3
≥
-4
dBm
No
Resolder or Change
PAM100
No
Check VBAT or PAM
control signal
Check UCP200
Yes
END