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Flow Chart of Troubleshooting
7-37
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7-4-2. GSM Transmitter
C1231
<= 30dBm
Resolder C1208, U1201
TX ON (5 Level)
Check U1202
pin4 = H, pin6 = L
C1221
<= 25dBm
C1233
<= 20dBm
R1102
<= 1.0V
Change or Resolder U1202
Check SPDT
control circuit
Resolder DUF1200
Yes
R1113 = H
Resolder or Change
PAM1101
Check +VBATT or PAM
control signal
No
No
No
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
END
Check U1102
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