PRO-91 150-Channel Handheld Trunking Scanner
(200-0521)                 Troubleshooting            Faxback Doc. # 48462

If you have problems, here are some suggestions that might help.  If they
do not, take your scanner to your local RadioShack store for assistance.

PROBLEM                  POSSIBLE CAUSE               REMEDY

Scanner is on but        SQUELCH is not               Turn SQUELCH
will not scan.           adjusted correctly.          clockwise.

                         Only one channel or          Store frequencies
                         no channels are stored.      into more than
                                                      one channel.

Scanner is totally       No power.                    Check the batteries
inoperative.                                          or make sure the AC
                                                      adapter or DC
                                                      adapter is connected
                                                      properly.

                                                      Recharge the
                                                      rechargeable
                                                      batteries or
                                                      replace the 
                                                      non-rechargeable
                                                      batteries.

                         The AC adapter or DC         Be sure the
                         adapter is not connected.    adapter's barrel
                                                      plug is fully
                                                      plugged into the
                                                      POWER jack.

The scanner's            Batteries are not            Make sure the
display dims or the      correctly installed.         batteries are
scanner sounds a                                      installed properly.
tone every 15-30
seconds.
                         The batteries are weak.      Recharge the
                                                      rechargeable
                                                      batteries or
                                                      replace the 
                                                      non-rechargeable
                                                      batteries.

Keypad does not work.    The keylock function is      To turn off the
                         activated.                   keylock, press
                                                      KEYLOCK until K/L
                                                      disappears.

BATT. Lo flashes.        The batteries are weak.      Recharge the
                                                      rechargeable
                                                      batteries or
                                                      replace the 
                                                      non-rechargeable
                                                      batteries.

Poor or no reception.    Batteries are weak or        Check the batteries
                         completely discharged.       or make sure the AC
                                                      adapter or DC
                                                      adapter is connected
                                                      properly.

                         An antenna is not            Make sure an antenna
                         connected or connected       is connected to the
                         incorrectly.                 scanner.

Error appears.           Programming error.           Re-enter the
                                                      frequency correctly,
                                                      including the
                                                      decimal point.

The scanner locks        Stored frequencies are       Avoid storing
on frequencies that      the same as "birdie"         frequencies listed
have an unclear          frequencies.                 under "Birdie
transmission.                                         Frequencies" in
                                                      Faxback Doc. # 17653
                                                      or only listen to
                                                      them manually.

Scanner will not         The transmission might       Scan another
track a trunked          not use a system that        transmission.
system.                  can be tracked by your
                         scanner.

                         The data frequency is        Find the data
                         missing.                     frequency (see
                                                      "Storing Trunked
                                                      Frequencies" in
                                                      Faxback Doc.
                                                      # 48461).

                         The system you are trying    Set the scanner
                         to track is a Type I system  to receive Type I
                         and the scanner is set to    trunked frequencies.
                         scan Type II systems.        See "Scanning Type I
                                                      and Hybrid Trunked
                                                      Systems" in Faxback
                                                      Doc. # 48461.

Scanner is set to        The fleet map you have       Check the fleet
receive Type I           selected or entered might    map and correct
trunked frequencies,     be incorrect.                it if necessary
but does not scan                                     (see "Scanning
them.                                                 Type I and Hybrid
                                                      Trunked Systems"
                                                      in Faxback Doc.
                                                      # 48461 and
                                                      "Programming a
                                                      Fleet Map" in
                                                      Faxback Doc.
                                                      # 17653).

Scanner will not         No IDs have been stored.     Store one or more
stop while scanning                                   IDs (see "Scan
a scan list.                                          Lists" in Faxback
                                                      Doc. # 48461.

                         The IDs you have stored      Scan another
                         are not active.              transmission.

Scanner will not         SQUELCH is not correctly     Adjust squelch
acquire a data channel.  adjusted for trunk tracking  for trunk tracking.
                                                      See "Setting Squelch
                                                      for the Trunk
                                                      Tracking Mode" in
                                                      Faxback Doc.
                                                      # 48461).

                         The frequency used for the   Press SRC to search
                         data channel is missing.     for the data channel
                                                      (see "Storing
                                                      Trunked Frequencies"
                                                      in Faxback Doc.
                                                      # 48461).

Missing replies to       The system you are trying    Set the scanner
conversations.           to track is a Type I system  to receive Type I
                         and the scanner is set to    trunked frequencies.
                         scan Type II systems.        See "Scanning Type I
                                                      and Hybrid Trunked
                                                      Systems" in Faxback
                                                      Doc. # 48461.

                         The selected fleet map       Try another preset
                         is incorrect                 fleet map or program
                                                      your own fleet map
                                                      (see "Scanning
                                                      Type I and Hybrid
                                                      Trunked Systems"
                                                      in Faxback Doc.
                                                      # 48461).

                         Not all of the trunk's       Enter all of the
                         frequencies have been        trunk's frequencies
                         entered.                     (see "Storing
                                                      Trunked Frequencies
                                                      in Faxback Doc. #
                                                      48461).

Channel activity         The transmission might be    Scan for another
bars are flashing,       a private or telephone       transmission.
but no sound is heard.   Interconnect call.  The
                         scanner does not scan
                         these types of transmissions.

                         The ID shown is not active.  Wait for the ID to
                                                      become active, or
                                                      scan another
                                                      transmission.

RESETTING THE SCANNER

If the scanner's display locks up or does not work properly, you might
need to reset the scanner.

CAUTION:  This procedure clears all the information you have stored into
          the scanner.  Before you reset the scanner, try turning it off
          and on to see if it begins working properly.  Reset the scanner
          only when you are sure it is not working properly.

1.  Turn off the scanner.

2.  While you hold down the 2 and 9 keys, turn on the scanner.  CLEAR
    flashes for about 5 seconds as the scanner clears its memory.

    Note:  Do not turn off the scanner until CLEAR stops flashing.
           Otherwise, the scanner might not clear its memory properly.

(BR/eb 6/23/98)

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