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9-2-10. WCDMA850 Transmitter
**Please Check the Main Antenna ,rear, front case, and screws, and then follow the chain below.
If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Battery Voltage: 3.8V
(AGC for 23dBm)
Check C125 = 8 dBm ?
Check C242 = 5 dBm?
Check C204 = 26 dBm?
CPL200 1pin= 25.5dBm ?
Check C200 = 24 dBm ?
Check C100 = 23 dBm ?
Tx ON
Yes
Yes
Yes
Yes
Yes
Yes
Yes
The End
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No
Check the U100
No
Replace F200
No
Replace PAM200
No
Replace CPL200
No
Replace DUF200
No
Replace RFS102
9-59
Flow Chart of Troubleshooting
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