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39
TROUBLESHOOTING
Your Radio Shack PRO-2040 100-Channel Programmable Home Scanner
should require very little maintenance. If you have problems, refer to this chart
for possible solutions. If you cannot solve the problem, contact your local Radio
Shack store for assistance.
Problem Probable Cause Solution
Scanner is totally inoperative. The AC or DC adapter
is not properly con-
nected.
Be sure the adapter is fully
inserted into the
DC 12V
jack
and into a working AC or DC
power source receptacle
The display dims. The AC or DC adapter
does not provide the
required 12 volts DC.
Be sure the adapter is set to
provide no less than 12 volts
DC.
The scanner turns on, but
does not scan.
The
SQUELCH
con-
trol is not correctly
adjusted.
Adjust the
SQUELCH
control
clockwise (see “Turning On the
Scanner/Setting the Volume
and Squelch”).
In the scan mode, the scanner
locks on frequencies that have
an unclear transmission.
You have programmed
a “Birdie” frequency.
Avoid programming frequen-
cies listed under “Finding
Birdie Frequencies,” or only
select them manually.
Poor or no reception. Improperly connected
antenna.
Programmed frequen-
cies are the same as
Birdie frequencies.
The environment is not
suitable for reception by
the scanner.
Be sure the antenna is properly
connected.
Avoid programming frequen-
cies listed under “Finding
Birdie Frequencies,” or only
select them manually.
Relocate the scanner and try
again.
Keys do not work or display
changes at random.
Undetermined error.
The CPU is locked up.
Reset or initialize the scanner
(see “Resetting the Scanner’s
Display” and “Initializing the
Scanner”).
Error
appears on the dis-
play.
Programming error. Reprogram the frequency cor-
rectly.
20-414.fm Page 39 Wednesday, August 4, 1999 11:12 AM