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Level 3 Repair
8-25
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8-4-1. GSM850 RX
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Change Main PBA
Normal condition
Catch the channel?
RX ON(Call Connected)
RF Input : 190 CH
Amplitude : -50dBm
No
Check Ant100,ant101
L100,L101,C105
Yes
PAM100 check
RFS100
≥
-65dBm
Check RFS100,L100,
L101,C105
No
Yes
Check the connection
C146,L103
Put more lead solder
each terminal
No
Yes
F100 check
C119
≥
3.3V ?
Check C119,L109
No
Yes
Check the connection
C120,C125.L110
No
Yes
Check F100,C120,C125.L110
Summary of Contents for GT-C3520
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