Troubleshooting - Radio Shack 20-106 User Manual

Additional Information
Scanning Rate ......... Approx. 55 channels per second
Search Rate ................... Approx. 90 steps per second
Display
LCD with amber LED backlight, 4 lines of 16
characters each, plus 13 display icons
Zeromatic
Automatically zeroes receiver on correct frequency
during searches
Audio Output................................................... 250 mW
Internal Speaker.................... 36 mm 8 ohms dynamic
Operating Voltage
6 VDC (4 AA alkaline, Ni-Cd, or Ni-MH)
External Power and Charge Voltage
9 VDC 500 mA regulated power supply
Dimensions (WxDxH)............2.56 x 1.65 x 5.71 inches
.............................................................65 x 42 x 145 mm
Weight (not including batteries and antenna)
Approx. 8.5 ounces, 240 grams
Memory backup
No backup battery required, utilizes non-volatile
EEPROM memory
Power
4 AA Alkaline Batteries (6.0 VDC), or 4 AA
Rechargeable Ni-MH or Ni-Cd Batteries (4.8 VDC)
or Optional AC Adapter (Class 2; 9V DC; 500mA;
center tip set to positive).
Specifications are typical; individual units might vary.
Specifications and depictions are subject to change
and improvement without notice.
94
Additional Information

Troubleshooting

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