Optimus Lab-1000 Semi-Automatic Belt Drive Turntable 
(420-2022)                 Troubleshooting            Faxback Doc. # 32548

If your turntable is not working as it should, these suggestions might help
you solve the problem.  If the turntable still does not operate properly,
take it to your local Radio Shack store for assistance.

SYMPTOM                 POSSIBLE CAUSE          SUGGESTION

Turntable does not      Tone arm locked into    Unlock tone arm from
work when plugged into  tone arm rest.          tone arm rest and
an AC outlet                                    position over record.

                        Connected receiver/     Turn on receiver/ 
                        amplifier not turned    amplifier.
                        on.

                        Rubber belt slipped,     Check rubber belt.
                        broken, or not mounted
                        properly.

                        Power problem.           Check the AC power
                                                 cord and AC outlet.

No Sound                Receiver/amplifier       Adjust receiver/
                        volume set to minimum.   amplifier's volume.

                        Turntable not connected  Recheck connections.
                        correctly to receiver/
                        amplifier.

                        PRE-AMP-IN/PHONO-OUT     Check setting of 
                        switch under turntable   PRE-AMP-IN/PHONO-OUT
                        platter set              switch.
                        incorrectly.

                        Cartridge needs          Replace the
                        replacing.               cartridge.

Sound from turntable    Stylus is dirty.         Clean the stylus 
not clear, scratchy                              with a soft brush.
during play.                                     (See "Cleaning/
                                                 Replacing the
                                                 stylus", on Faxback Doc.
                                                 # 32549).

                        Stylus is installed      Check the stylus and
                        improperly.              reinstall it if
                                                 necessary

                        Stylus is worn.          Replace the stylus.

                        Record is dirty.         Clean the record.

                        PRE-AMP-IN/PHONO-OUT     Check setting of
                        switch under turntable   PRE-AMP-IN/PHONO OUT
                        platter set              switch.
                        incorrectly.

                        Cartridge is installed   Check the cartridge
                        improperly.              and reinstall it if
                                                 necessary.

                        Cartridge needs          Replace the
                        replacing.               cartridge.

Humming sound from      Cartridge is installed   Check the cartridge
turntable during play.  improperly.              and reinstall it if
                                                 necessary.

                        Turntable picking up     Reposition the
                        induction hum from       turntable away from
                        other components.        other components.

Feedback or howling     Turntable picking up     Reposition the
sound from turntable    sound pressure or        turntable away from
during play.            vibrations from          speakers.
                        speakers.


(YO/EB 4/22/96)