my r91 has developed a loud hum coming through the speakers. it does not change with volum. powering off doesn't stop it only by un plugging the power cord is the only way to stop itThanks
Frank

i can raise the mechanical lock ,it relocks after the mech starts in motion . I was tring to use the service switch to see if it would scan, it does click a relay when i put it in the scan psition but nothing else happens Frank .....................

also noticed the service switch does not turn the mech. off

ron
just tried that, no differance.read all the manuals tried the trouble shooting guide listed tests still nothing new
Thanks
Frank

after thinking about it for a while i remembered what the tmu is i was calling it tcc. the relay is energized .ihave manualy released it but it goes back down when the clamp closes it will just keep cycling over and over spins, pick arm moves to the top, clamp energises then it resets and does it ag...

Being new to this I don't know what the tmu is . otherwise tried your instructions. no difference the mechanism seem to be locked in place. I checked everything I could to find the problem but it still does the same
Thanks
Frank

yes i have the service manual . the pick uo arm is in the slot to the left of the magazine so no record comes up .the reverssing switch is energized and the mech is where it was when i got it
Thanks
Frank

It is all the way to the left. no record is in the end. the reversing switch is to the right

When I got the machine nothing worked . After a little work, mech. capacitor, fuses, and some other small things, it lights up but the mechanism sits and spins and does not scan. It cycles through, lift arm comes up, clamps then repeats the same over and over. Any help would be useful I have had sev...