Seeburg M100C problem

Today when I started up my Seeburg It was non-responsive. The jukebox did power on and the lights came on, however the record selector would not budge. There is a record in the selector but the needle is not touching it (as if the record ended and there were no new selections). When I use the keys to select a new record, they do move the pin in the back to select a new record, however the current record does not go back into the record storage space and the selector doesn't move, or play a record, or anything. I got in the back and moved a few pins manually with same result. For some reason thing is just completely non-responsive when the pins move. Please help, no idea where to even start here...

The only other detail I can add is that there is usually a loud "pop" when I turn the machine on right as it is starting up. When I turn it on now, I'm not hearing that familiar "pop".

Check the fuse on the selection receiver.
IF your lights are plugged into the outlet that the external power cord is connected to you will not notice if the machine's main fuse has blown.

Are the tube heaters lit? Those are also powered from the WSR.

The "pop" you heard should be more like a 'clack" indicating the latchbar solenoid is energizing. This may be your problem as they are not designed to stay on an will overheat and eventually short out and sometimes start to burn the insulation and doping on the coils.

Rob-NYC

Hi.

I received the service manual a few days ago and have read through it. Unfortunately, I can't seem to find a detailed diagram of the WSR inside the service manual (anyone have a page number?) Anyway, I removed the outer casing of the WSR to take a look. I think I have identified the latchbar solenoid (see photo with red circle). It seems to me that the fuse is not the problem because the tubes are heating up when the unit is on. Am I correct in assuming if the fuse was blown the tubes wouldn't heat up?

Can someone please guide me through what I need to do to diagnose whether this problem is indeed a burnt out latchbar solenoid or something else?



Thanks,

Back to the book--you have circled the credit cancel coil, (on the CCU, which is attached to the WSR---and yes--the WSR schematic should be in the book--near the last few pages)-- not the latch bar solenoid--is the 5U4 tube lit up ?
Do you have the service switches in the "operate position" ? Ron Rich

Ron,

Yes, the 5U4 tube is warm. As far as the service switches, are you referring to what is labeled in the diagram as the scan motor service switches which are located under the record carriage? I flipped them both, no change. The bottom switch doesn't actually stay down, it just clicks down and right back up. I assume that's by design. Where is the latch bar solenoid located? I see it in the picture diagram in the service manual but it does not give a precise location?

Best,

Eric

Hi Eric,
I did not axk if the tube was "warm"--is it lit up ?? Latch bar solenoid is in the ES--as shown by the "dotted lines"in the book.
Yes--one of the service switches is a spring loaded unit--other is not-- See your "maintenance manual" for instructions as to how to use this feature. Ron Rich

Ron,

All the tubes are pretty faint. The top of the 5U4 tube is light up, but the bottom does not appear to be. Maybe this photo (attached) will help.



Thank you,

Eric

It appears as if it is--turn the non-spring service switch to off, and the 5U-4 ONLY, should go off--If it does go off, you have lost power to the motor, or lost a motor--motor cap-- See the schematic-- Ron Rich

Ron,

Turning the service switch to off does turn off the 5U4 bulb. Do you have any idea why the motor would have lost power? I'm looking in the diagrams now but don't see anything called a motor cap. Sorry for my ignorance on the matter, as I am a beginner. Can you please advise what steps I can take to diagnose/resolve the motor power problem?

Many thanks,

Eric

Any chance it is this fuse? I'm having trouble determining whether it is blown or not, because the glass is so cloudy.

Hi Eric,
If you do not have the skills to read the schematic, you really should ought not attempt to repair this, as you can be seriously hurt, or worse, working on this circuit ! Find someone who can read the schematic, or call a "pro"-- Ron Rich

Update -

There was power going to the motor. The problem was a blown capacitor on the motor. For anyone that may experience this issue in the future -- I was able to diagnose this problem by placing my finger on the motor and flipping the service switch. If you feel an ever so slight pulse, you know there is still power going to the motor. In my case, there was power going to the motor but obviously because the capacitor was blown there wasn't enough juice to turn the motor. After replacing the capacitor everything works as it should.

Guys,
I consider it a VERY dangerous "practice" to ever flip a reversing switch on a Seeburg by hand, with power applied ! I would strongly advise this NOT be done-ever ! Doing so is likely to put undue stress on the blades and/or the segment that binds them together. ( and--if done on a later model mech, OFTEN runs the contact(s) on the "frog" !). Ron Rich