Radio Shack PRO-651 - Troubleshooting; Scanner won’t power on.; Poor or no reception.

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Additional Information
Troubleshooting
Problem Cause Solution
Scanner won’t
power on.
Scanner is not re-
ceiving power.
Recharge the re-
chargeable batter-
ies or replace the
non-rechargeable
batteries.
The AC adapter or
DC adapter is not
connected.
Be sure the adapter’s
barrel plug is fully
plugged into the DC
9V jack.
is flashing.
Batteries are low. Recharge the re-
chargeable batteries
or replace the alka-
line batteries.
Poor or no
reception.
Batteries are weak
or discharged
completely.
Check the batteries
or make sure the
AC adapter or DC
adapter is connected
properly.
Weak signals from
distant stations.
Reposition radio for
best reception.
Attenuator in use
on weak signals.
Check performance
with and without
attenuator activated,
use setting with best
reception.
Strong signal over-
load from nearby
transmitter.
Check performance
with and without
attenuator activated,
use setting with best
reception.
Loose or defective
antenna.
Inspect antenna
and connectors
and correct any
problems found.
Incorrect
modulation mode
selected.
Ensure that proper
modulation mode
is selected for the
type of system
being monitored.