User Guide

Flow chart of trouble shooting 5-22
5-13 DCS Receiver
Rx On
RF input : CH center freq. + 67.7 kHz
Amp. : -50 dBm
U602
Pin 8
U602
Pin 1
U604
Pin 3
U634
Pin 3
U605
Pin 2, 3
U605
Pin 49, 50
(225 MHz)
U605
Pin 43, 44
(45 MHz)
Check IF connector
- > resolder
Resolder &
U602 Pin 1
Check
VC1 : L
VC2 : L
Resolder
U604, C624
Resolder
U605, C646, C647, L620
L618, C700, L607
Resolder
U634, C625, L608
Check
C600(CH-225MHz)
C636(1080MHz)
Resolder
U612
Resolder
U601, C604, C605
L603, C612
U605
Pin 24, 25, 26, 27
Resolder
OneC(U501), U605
Check U605
Resolder
U605 (Pin32, 33, 35)
Resolder
U501
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No