User Guide

5-22 Flow Chart of Troubleshooting and Circuit Diagrams
5-13 DCS Receiver
Rx On
RF input : CH center freq. + 67.7 kHz
Amp. : -50 dBm
U203
Pin 8
≥ -65 dBm
U203
Pin 1
≥ -65 dBm
F203
Pin 3
≥ -70 dBm
F204
Pin 3
≥ -60 dBm
U454
Pin 2, 3
≥ -60 dBm
U454
Pin 49, 50
(225 MHz)
≥ -50 dBm
U454
Pin 43, 44
(45 MHz)
≥ -55 dBm
Resolder
CN1
Resolder &
U203 Pin 1
≥ -65 dBm
Check
VC1 : L
VC2 : L
Resolder
F203
Resolder
F204, C721, L595
Check
C481(CH-225MHz)
≥-20 dBm
C137(1080MHz)
≥ -20 dBm
Resolder
U478
U454
Pin 24, 25, 26, 27
≥ 40 mV
Resolder
OneC(U618), U454
Check U454
Pin 32,33 ≥ 2.5 V
Pin 35 ≥ 2.5 V
Resolder
U454 (Pin 32, 33,35)
Resolder
U618
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Resolder
C248, L594, C214
L406, C235, C575
Resolder
F200, C698, C699, C494
C215, C213, L201, R223,
C242, L212, L213