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Flow Chart of Troubleshooting
7-32
7-16. DCS Receiver
Module1 Pin8
>= -65dBm
Resolder CN100, C101
No
Yes
RX ON
RF input : 698CH
Amp : -50dBm
Check Module1
pin9,pin10,pin12 = L
Module1 pin3, pin4
>= -65dBm
U100
D1 >= -70dBm
C1 >= -70dBm
Check ANT Switch
control circuit
Resolder Module1
Resolder C104, C105, L104, L105
Yes
Yes
Yes
No
No
No
END
U100 H7,H8,J7,J8
>= 1V
Check U100
J2,A6,B6,A9,E9
>=2.7V
Check & Resolder
U100, R114, R116
RF26MHz, RF PSU Part
Resolder U100
C219, C220
>= 1V
Yes
Yes
Yes
Yes
No
No
Check U200