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5-11 GSM Receiver
5-18
Rx On
RF input : CH center freq. + 67.7 kHz
Amp. : -50 dBm
U602
No
Pin 2
Yes
U602
Pin 9
Yes
U603
No
Pin 5
Yes
U604
No
Pin 2
Yes
U605
No
Pin 53, 54
Yes
U605
Pin 49, 50
(225 MHz)
Yes
U605
Pin 43, 44
No
(45 MHz)
Yes
U605
No
Pin 24, 25, 26, 27
Yes
Check U605
No
Yes
Resolder
U501
Check IF connector
- > resolder
Resolder &
No
U602 Pin 9
Yes
Resolder
U603
Resolder
U605, C695, C629,
C625, L630, L613
Resolder
U604, L605. L621,
L622, L623
Check
C601(CH+225MHz)
No
C636(540MHz)
Yes
Resolder
U601, C603, C607,
C609, L604
Resolder
OneC(U501), U605
Resolder
U605 (Pin32, 33, 35)
Check
No
VC1 : L
VC2 : L
VC3 : H
No
Resolder
U612
Flow chart of trouble shooting
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