Wurlitzer 750E won't stop after last selection

[Mars Amp Repair]

Hello folks,
I am working on the 1943 Wurly 750E.  This one keeps running even after the last selection is played and selection pin is reset.  I suppose there has to be a leaf switch somewhere on the mechanism to indicate when it's in the 'stop' or 'home' position (record returned to the stack), but the box is at the client's home so I would have to return back there to give it a better look-over.  It also seems to me that there must be some kind of connection in the selection coil assy that tells the box when the last pin is reset, but I cannot ferret that out in the diagram or on the actual selector assy.
Any help is appreciated.
Thanx, glen

[Ron Rich]

Hi Glen,
Not 100 % sure on that mode, but later models have a "relay" dead center of the coil assembly--under a (no longer there) clear plastic cover. Can't recall exactly how it functions, but that's motor control-- Ron Rich

[Mars Amp Repair]

Thanx for the reply.  I think that is on another model.  The particular selector in the 750E model is mounted on the Rt side of the mech (from the back) and is chain driven.  Its reset solenoid is internally mounted inside the selector assy. and there is no switch or relay mounted on top of it.  I thought perhaps there was a part of the coil assy had something that registered when any pin is extended so that when they were all reset, that connection would be open thereby triggering a relay somewhere to power down the box when that coincided with a 'home position' switch that is mounted somewhere on the mech.
Thanx so much for the quick response.  Much appreciate.  glen

[Ron Rich]

Hi Glen,

You have triggered my memory, of a type of dual pricing unit-- vague memories of two "ratchet assemblies"-- 2nd one steps up with each selection made, and steps down

after each one plays-- that controls motor power---- Ron Rich

[Mars Amp Repair]

Ah!  I do recall the 2 ratchet assys as you described.  One of them had a spring hanging loose when I opened the box.  I 'naturally. refitted it where it should have been.  Now, this machine supposedly was somehow set up for free-play by placing a quarter in the slot & only pushing it in about 1/2 way.  As best as I could see that triggered the coil cycling motor in the coin box but I'm really not sure how that would give it free plays. Perhaps that spring being disconnected had something to do with free-play or this motor issue?  No idea at this point.

Anyway, I guess in my mind regardless of how many plays were registered in these rachet 'memories', it still seems to me that after the last selection plays (and pin reset in coil assy), the box should still stop when it reaches 'home' position  UNLESS as you suggest, there is a way in the rachet play registering section it could still override the motor operation.
Thanx again for the ideas to pursue.
I'll definitely post when I find the cause.

[Ron Rich]

Hi Glen,
My memory of this is VERY vague--I think I had a problem with the ratchet being "stuck", on one, some 30-40 years ago ? I think I freed it up, oiled it and ran like "heck", before something else could come up --LOL-- (customer owned both a 750E, and a beautiful K model Seeburg,which I had restored -- is a great guy, but always want me to get the 750 going "again", when I serviced the K-- ) Ron Rich

[Mars Amp Repair]

Thanx again, Ron. I've never overhauled as in tore completely down any jukebox.  I did consumer electronics repair from the 70's up through the mid 90's until VCR's and just about everything else started to become exchange or throw-away.  Sad time for sure.  My folks just happen to acquire a 1938 Seeburg Classic jukebox & I messed with it a lot.  I realized even at 12yrs old that that massive 10ton tone arm was just tearing up the records as well as the tripping mech that put undue pressure on the stylus & record grooves.
I replaced the 10ton tone arm with one from an early 60's Garrard turntable and modified the reject mech to be an old microswitch with long rod on it and a solenoid to do the rejecting (both salvaged from an old dishwasher someone was throwing out).  I mounted the switch with Erector Set parts I had left over.  When I sold the box in 1998 for lack of room at the time, all those parts were still in the box functioning!  I'm cracking myself up here remembering that.
Anyway, I had my own musician's repair brick & mortar biz for nearly 10yrs from 2005-2012 in Denver.  In between my last consumer electronics repair job at Panasonic Factory Service in Denver & starting my own biz worked for AT&T doing something called Translations that had absolutely nothing to do with repair.  Quite the hiatus for nearly 8yrs.   After shut down biz in 2012 I worked for a few corporations doing repairs of some sort or another.  Got pretty burned out from the corporation life.
Anyway, not sure how I got to my life's story!!  Guess I'm approaching that stage of life where you tend to ramble-on (Cue Robert Plant).

So regarding the post, I guess I'm kinda surprised there haven't been more responses and I thank you again for yours.  glen

[Ron Rich]

Hi Glen,
Not too many "old timers" left that remember that model ! Might try the WurliTzer group mentioned in our FAQ's section ?
Ron Rich

[Mars Amp Repair]

Again, really appreciate it...Glen

[Mars Amp Repair]

Oct 7, 2021 14:28:50 GMT Ron Rich said:

Hi Glen,
My memory of this is VERY vague--I think I had a problem with the ratchet being "stuck", on one, some 30-40 years ago ? I think I freed it up, oiled it and ran like "heck", before something else could come up --LOL-- (customer owned both a 750E, and a beautiful K model Seeburg,which I had restored -- is a great guy, but always want me to get the 750 going "again", when I serviced the K-- ) Ron Rich

Hey rich,
You hit the nail on the head. The motor power switch on this model is hidden in an assy they refer to as 'The Magazine Switch'. I don't know the nomenclature but have no idea why it's called that. Anyway, i kinda stumbled on it as i recognized the motor switch from a video posted on YouTube by Uncle Doug. I also repair guitar amps and the like which is mainly what he does.
Anyway as your jogged 30-40yr old memory stated the magazine switch assy has one of many stepper dog assys and this one is all gummed up holding the motor switch always 'on'.
It does appear that there a few of these ratcheting switching solenoid assys that all have to ratchet in step for this all to work properly. That in of itself seems inconceivable unless at some point they all reset simultaneously. I'll discover more as i get all these assy's cleaned up and relubed.
As an aside, I need to find how to configure my settings on this site to email me when i receive responses. Maybe going to my Spam-spam-spam folder😊
Thanx again, Glen

[Ron Rich]

Hi Glen,
Thankx for the up-date-- as I keep saying--my memory "is great--just not too long " ! Ron Rich

[glen]

I know all these entries are from 2021, but I'm back on this wurlitzer 750E. I first want to mention that, that dangling spring was intentional to keep the dog/rachet that is rachetted up as coins are inserted, it counts down as the plays go by. Removing the spring prevents the counting down, hence the eternal free plays. You just rachet it up 24 steps and leave it there. I have a pic, but it's not on this computer.
I am back with the some of the selector buttons not working. I deoxed them the last time I as there and it resolved the issue, but now the issue is back.
It also has an issue with not finding the correct selection & I'm hoping the 750E does not have the same frame bushing wear like the 1015 does. I'm not equiped to deal with a complete tear-down.
Anyway, there ya have it.
Glen

[jukeboxmarty]

May 19, 2024 15:45:14 GMT glen said:

I know all these entries are from 2021, but I'm back on this wurlitzer 750E...

I'm assuming you are the original poster. New account?

[glen]

May 19, 2024 16:45:13 GMT jukeboxmarty said:

May 19, 2024 15:45:14 GMT glen said:

I know all these entries are from 2021, but I'm back on this wurlitzer 750E...

I'm assuming you are the original poster. New account?

Yes I am the original poster of this thread, but I may have had to re-register not recalling my original login information.