Seeburg 100A Mech Stuck

Hi

While working on the cosmetics I thought I would listen to some tunes. Flipped K10 pin and mech scanned to the right and locked up at a point I would descibe as one slot past K10, which is not a slot at all but a space after K10. I can manually move the TT just short of 5 full turns in each direction. The tone arm will switch positions form A side to B side and vice a versa, however the mech will not move at all.

Suggestions on how to remedy this situation will be appreciated.

Best
Darrell

Hi Darrell,
You will need to determine why the cam shaft is "sticking". Did you "re-adjust' something ?
You might check the position of the trip lever relay armature-- change it if possible ?
Ron Rich

Hi Ron

As I suspected, the mech has traveled too far to the right side. It is trying to load a record and the load arm is coming up and pushing on the frame end piece and that is what stops the TT from turning further. Will need to get it out of load mode and into scan mode. Will also need to figure out why it went beyond K10 to attempt to load a record?

Best
Darrell

Darrell,
Since I have only worked on a few dozen of the model A mechs, and have never seen that problem, I'm just guessing based on experience with the later, 45 rpm, mech. When it overshoots, it came be any one, or combination of the following--poor lubrication in the clutch area ( or a problem there), mis-alignment of the SAU, or frog. Poor connection in the frog sensor, and, or the "W" contact.
As for "over-traveling" past K0, I don't understand how that can stop the turntable from turning ? It won't on a later mech ?
Ron Rich

Ron

What stopped the TT was that the load arm would push up against the frame as it was not coming up under a record slot. Thus when the load arm hit against the end rail it could not travel any further and stopped the TT from turning.

Mark came over and he got it to go into scan mode, after a lot of work. I think you may have a point about lubrication playing a part in this mess. Once we got it loose, we oiled the cams and it seems to want to go into scan most of the time now. Hopefuly, using it and monitoring the lubrication better will resolve the scan issue. There are several other issues we need to work on also, however that will come after we get it scanning properly and selecting and playing records properly. It gets naughty now and then and wants to reject the record as soon as the stylus sets down on the record occasionally. Also have developed a rattle in the latch bar solenoid we will need to deal with. As the solenoid is brand new, I am guessing that it needs to be adjusted(it worked fine for the first several days).

Thanks for the guidance and have a great weekend!

Best
Darrell

Hi Darrell,
If the record lift arm stopped the motor (TT), I was not aware it was geared to lift up--they improved that design on the 45 rpm players as it is only spring pulled up--gear driven down. Thanks for the info, I'll attempt to put it into my memory---! Ron Rich

Ron

Do not want to mislead you, I could push down on the load arm and it is spring loaded up. Apparently the load arm affects some other part when it can not completly load the record and that part prevents the TT from turning? This mech is different when you compare it with other mechs.

Best
Darrell

Darrell,
Himmmmmm--interesting--wish I had an A mech here to look at--can't understand how that could be ?
Ron Rich