MPA-30  (320-2034)            Troubleshooting         Faxback Doc. # 6967
20-Watt AC/Mobile PA Amplifier

If you have problems with the amplifier, use the following checklist to
find the problem:

*  Check all the connections.

*  Be sure none of the speaker wiring, microphone cables, or other
   connecting cables are defective.

*  Be sure you have provided adequate ventilation.

*  Be sure you correctly calculated the total speaker impedance.

*  Be sure there is no defective microphone connected.

*  Be sure the speaker wire you use is a large enough gauge:  18 gauge
   for lengths of wire up to 25 feet and 16-gauge for lengths over 25
   feet.

For the best results, we recommend you use the shortest length of wire
possible.

*  If you have feedback problems, re-position the microphones and
   speakers, and adjust TONE if necessary.

*  If the amplifier does not work at all, check the amplifier's fuse (on
   the back panel) or the fuse in the supplied DC power cable (If you
   power the amplifier with a 12-volt DC power source).  If either fuse
   is blown, replace it with the appropriate supplied spare fuse (2-amp,
   250-volt) or an identical fuse.

If none of the above solves the problem, take the amplifier to your local
Radio Shack store.  Our personnel will assist you and arrange for service,
if needed.


(smm 03/04/94)