m100c plays same record over

Hi, I'm new to this forum and to jukeboxes and would like help on the following. I recently received a Seeburg M100C. It scans using the service switches, but in normal operation it plays the same record over and over. It selects the record, plays it, replaces it at the end of play, then selects it again and repeats the process. It also will only stop at 3 different record positions. Where should I start to look in order to fix the problem. Thanks, Steve.

Hi Steve,
Welcome--
I would start with the Service Manual---(if you don't have it, see "announcements--where to find--" above). After reading it, you should have a better handle on exactly what it is doing and why. I would also suggest that my "Seeburg Mechanism Guide" should be of assistance here. You will need to better define your problems, as it is almost impossible to trouble shoot them with what you have written-- Ron Rich

Hi Ron,
Thank you for the reply and suggestions. I do have a manual and mechanism guide and understand the theory of operation. The selection does not cancel after playing. If the carriage is advanced past the selection after it plays by using the service switches, it will scan back to the same selection and play it again. If the service switch is not used, it plays the same selection over and over. I'm suspecting that the problem is at the selector contact block, or due to a bad switch contact somewhere along the cancel circuit. I just need a little help in getting started as to where to look. If the problem is with the selector contact block, can this be taken apart easily for cleaning and adjustment? Is additional information needed in order to help in the diagnosis?
Thanks, Steve.

Steve,
Play K-9, K10 (or A-1, A-2)--watch the "white sensor" in the frog. When in the play position, the white sensors should be centered PAST the selected pins--as shown in the manual--"Contact block adjustment ( or, alignment)". If not aligned as shown, and stopping on the selected pin, this will cause the problem you are having. If this is correct, the other cause can be the "C-SC" contact adjustment.
Was this jukebox moved without proper shipping bolts installed ?
Ron Rich

Thanks Ron, I'll check that today. Yes, it was delivered without the shipping bolts installed. I don't see any in the unit, probably lost. Can these be purchased, and where would they go.
Steve

Steve,
They are described in the "Maintenance Manual" for the C--later models called the book the "Information and Operation Manual".
Since it was moved improperly, it may have been laid on it back. When this is done, the contact block ("frog") tends to "jump" out of it's holder,and, if you are lucky, it does not bend, nor snap off, the alignment spring.
One question here--does this problem occur on both sides of a record, or, only the even sides? If only the one side, the frog has jumped the spring holder for sure.
You will need to re-position it in the "U" shaped holder, prior to checking anything else--
Ron Rich

I think you've identified the problem. Upon closer inspection I did notice that the "frog" had jumped out of the holder, and it does look as if the holder is bent. It has an angle to it that tilts down to the left (spring side) so that the holder is not parallel with the contact block track. I'm assuming that the holder needs to be straightened out so it is parallel with the track, and that this needs to be done before the "frog" is repositioned into it, correct? I'm making progress so thanks for all the help. I'll report back with results.
Steve.

Steve,
I hope you see this before you attempt to fix it !
Use a lot of care here, as the casting of those "arms" have a tendency to snap off when being "bent"--go very, very slowly, and use some heat ! Don't melt them, or anything else either !) Good luck !
Ron Rich

Ron,
Thanks for the "heads up" but I'm a little confused now. The black contact block assembly (frog) sits in the drive bracket (the holder with the spring). The drive bracket is attached to the contact arm on the carriage assembly, and runs under the frame. I attached a picture of my situation.

It appears that the holder (not the contact arm) is bent down to the left and the spring is not contacting the block assembly. I can't tell if the contact arm that supports the holder is also bent but I don't think so. Is it the contact arm that you are referring to in your last post, or is it the holder? Should I straighten the holder so it is parallel to the selector assembly track?

Also, I have removed the selection assembly for servicing and cleaning. One of the selection coils is burnt out. Do you know if they are available for replacement?
Thanks, Steve.

Hi Steve,
That's a classic case of the problem encountered by not properly bolting the mech for transport !
You need to do what ever it takes to return the "U" holder (aka "bracket"), so that both ends of the "U" are high enough to support the frog.
In other words--the "tips" of the "U" should be no further then about 1/4 inch from the bottom of the frog.
Replacement coils are available from Vern Tisdale http://www.verntisdale.com Also, if you want NOS coils, check with Bob Putnak <sales@tubesound.com>; He MAY still have some--
Note: If you are 'burning coils", check fuse size--it's the "outboard" one and should NEVER be larger then 1.6, even if the paper label calls for a 2amp !
Ron Rich

Ron,
Thank you for all your time and advice. I'll probably be back once I get started on the mechanism.
Steve.