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Level 3 Repair
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8-52
8-4-4. 1x CDMA RX
**If you check the Rx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Resolder U500 or Change
Check Antenna contact
The End
No
Resolder or Replace DUF400
Yes
No
Normal condition
Catch the channe
l?
Continuous Rx ON
RF Input : 384CH
Amplitude : -50dBm
Check C417,C427
>= -55dBm ?
Check C447, C450
>= -60dBm ?
No
Resolder or Replace U402
Yes
Yes
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