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Level 3 Repair
8-29
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8-3-2. RF part
8-3-2-1. GSM850 Receiver
RX ON(Call Connected)
TCH Channel : 190 Ch
BCH PWR = -60dBm
Check PAM100
Check UCP200
Normal condition
Catch the channel?
Yes
No
Yes
RFS100
Pin 2
>= -60dBm
PAM100
Pin 15
>= -70dBm
No
Yes
Check Ant and Resoleder
L100,C124,C117,L103,C120
No
END
Resolder RFS100,L104,L101
F102
Pin 6,7
>= -75dBm
Check C139,L111,C143
(crack,open,etc)
No
Yes
Check F102,L112,C142
PAM100
Pin 17
>= -70dBm
No
Yes
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