Motorola Mototrbo - Page 245

Troubleshooting Flow Chart for Rx VCO 1-11
4.1 Troubleshooting Flow Chart for Rx VCO (Sheet 2 of 3)
Vbe ~ 0.8VDC for Q0202?
Check components from C0228 to
C0234 for shorts and open
Receive VCO1 or Receive VCO2 Selected?
Vbe ~ 0.8VDC for Q0201?
Check biasing components
R0222,R0224,L0218,L0220,L0222,
R0228,R0230 & Q0204 for short or
open; then replace Q0204 if needed
Check components from C0241 to
C0267 for shorts and open
Check biasing components
R0208,R0210,L0205,L0207,L0209,
R0216,R0214 & Q0201 for short or
open; then replace Q0201 if needed
Vbe ~ 8.2VDC for L0220? Vbe ~ 8.2VDC for L0207?
Check RFIC troubleshooting flow
chart
Check RFIC troubleshooting flow
chart
Check 1.8VDC at
R0220?
Is 8.2V DC at R0222? Is 8.2V DC at R0208?
Check 1.8VDC at
R0219?
Check RFIC troubleshooting
flow chart
Radio not programmed for
VCO2 or Q0202 not
functional
Radio not programmed for
VCO1 or Q0203 not
functional
seYseY
No No
No No
No No
Yes Yes
YesYes
Yes
Yes
No
No
RXVCO2
RXVCO1