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Level 3 Repair
8-3-2-3. GSM900 Receiver
RX ON(Call Connected)
TCH Channel : 62 Ch
BCH PWR = -50dBm
RFS101 Pin 2
>= -60dBm
Yes
RFS101
Pin 14,15
>= -70dBm
Yes
U100
Pin 48,49
>= -75dBm
Yes
Check U100 & UCP300
(crack,open,etc)
END
No
Resolder RFS100,L103,C100,L149
No
No
Resolder or change L111,L112,L113
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Check RFS100
pin3 = L ,
pin4 = L,
pin5 = H,
pin6 = L,
Yes
RFS101 Pin7
=2.7V
(C105,107)
Yes
8-32
Check
No
R107,109,110,111
and UCP300
(crack,open,etc)
No
Check PMIC(U401)
circuit(crack,open,etc)
Resolder or change RFS101
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