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Flow Chart of Troubleshooting
9-21
9-13. GSM850 Transmitter
①
9-14. GSM Transmitter
①
Change or Resolder PAM100
Yes
PAM100 Pin4
≥
-65dBm
TX ON (5Level)
Check PAM100
Pin8=H, Pin9=L,
Pin10=H
PAM100 Pin15
≥
-30dBm
Check ANT Switch
control circuit
Yes
Yes
Yes
No
No
No
END
Change or Resolder PAM100
Yes
PAM100 Pin4
≥
-65dBm
TX ON (5Level)
Check PAM100
Pin8=H, Pin9=L,
Pin10=H
PAM100 Pin15
≥
-30dBm
Check ANT Switch
control circuit
Yes
Yes
Yes
No
No
No
Resolder C126, R105
END
Resolder PAM100, L103,
L145, L104, L107, C115,
C170
Resolder PAM100, L103,
L145, L104, L107, C115,
C170
Resolder C126, R105
③
③
②
②