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9-2-4. GSM900 Transmitter
**If you check the TX chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Tx ON
(Level : 5)
battery voltage : 3.8V
U101 Check
Pin#D7 ≥ 6dBm ?
YES
PAM101 Check
Pin #5 ≒ 6dBm ?
YES
U103 Check
Pin #22 ≥ 29dBm ?
YES
RFS101 Check
Pin # 1 ≥ 28.5dBm ?
YES
RFS101 Check
Pin#2 ≥ 28.5dBm?
YES
THE END
NO
NO
NO
NO
NO
SAMSUNG Proprietary-Contents may change without notice
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Check the U101
Check the path from
U101 to PAM101
Check the path from
PAM101 to U103
Check the path from
RFS101 to U103
Resolder or Change RFS101
9-26
Flow Chart of Troubleshooting
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