Sharp SGH-F250 - Manual (Page 58)

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Flow Chart of Troubleshooting
9-30
9-16. DCS Transmitter
U100 pin G4,F3,D6,
C5,B3,A5,F1
29,32,33,36 ≥2.8V
pin C1 ≥2.9V
END
Check UCP200
Yes
Resolder U100
Check VBAT or PAM
control signal
No
Change or Resolder
MODULE100
Yes
MODULE100 Pin13≥
-65dBm
Resolder
MODULE100,C102,L102
TX ON (5Level)
Check MODULE100
pin11 = L (2.6V),
Pin9 = H
MODULE100 pin8
≥ 25dBm
PAM100 pin17
≥ 25dBm
PAM100 pin1
≥ -4dBm
Check ANT Switch
control circuit
Resolder or Change L113,C109,
C110
U100 pin
C2,B1,B2,A1
≥ 0.2Vp_p
Yes
Check PAM100 pin
2,3,5,6,8, +Vbatt
pin4OK? Resolder or Change PAM100
Check & Resolder
C115,C116,C117,C114 And
PMU Part
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
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③
④
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