Motorola GTX/LCS 2000 Service Manual page 64

Are alert tones
No/Don't
enabled with RSS?
know
Use RSS to enable tones.
Yes
Are alert tones
enabled with RSS?
No
Check radio con-
nection to RIB and
computer.
RIB/radio
No
connections OK?
Yes
With power connected to radio and the radio turned
on, check the following:
1) 5 V at pin 1 of U631 and pin 71,12,31,41 of U0101.
2) Check for 14.7456 MHz at pin 73 of U0101.
3) Check DC at pin 75 of U0101. If < 4.5V DC check
TP0200 for 2.1 MHz signal.
4) Check for typical voltages of U0101 and U0201.
Start
Apply power to radio and
turn on.
Was good or bad power-on
beep present?
Yes
Was good power-on beep
present?
Yes
No
Yes
End
Main radio board must be
replaced.
Done
No
Are tones present
on power up at
U0202, pin 8
(RX AUDIO)?
Yes
Audio problem. Trouble-
shoot audio circuitry.
Reprogram radio with
RSS. Apply power to
radio and turn on.
No
Was good power-
on beep present?
Yes
Done
Done
Troubleshooting Flow Chart
for Controller
Troubleshooting 8-7