Gsm900 Transmitter - Samsung GT-E1080 Service Manual

9-12. GSM900 Transmitter

TX ON (5Level)
Yes
PAM100 Pin15 ≥
30dBm
No
PAM100 pin4 ≥ -4
dBm
No
UCP201 pinA2
≥ -4dBm
No
Check & Resolder
C108, C207, C208, C201,
C202
And PMU Part and UCP201
Yes
END
yes
Resolder L113, C110, L114
Yes
Yes
Yes
Resolder or Change
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Check PAM100
pin 8 = H
Pin 10 = L
Yes
Check PAM100
VBATT(pin11) OK?
No
C120, C112, L103
9-23
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder PAM100
Yes
Check UCP201
Check VBAT or PAM
control signal