After having much success with getting a couple of Rockola machines operational, I am now getting into the Seeburg world!
I have a Seeburg M100A that was converted to 45 play with the CalCoin kit, and which I intend to convert back to 78. I have 2 manuals for the machine, one from Victory Glass (the nicer manual) and the other from Jukebox Arcade (has some extra info than the VG one).
My machine has two issues as I can tell:
1. When making any selection, the selected pin is not moving into the play position. I can manually trip a pin and the machine will go to that selection and play. 2. After playing a selection, the record is put back in the rack but the pin is not canceled, and the mech will search and go to the same selection to play. I manually cancel the pin and the mech will stop, as it should.
The credit system is adding credits with coins as it should, and removing credits when a selection is made. And the amp is working well.
I do not have an analog VOM yet, but one is coming soon, and I believe I need that to help diagnose this issue from what I have read on various forums.
I am seeking guidance for the two issues presented above, and would like to know if the subsequent models B and/or C are in any way similar to the Model A as to the pinbank operation when searching for info on the web.
I have also ordered Ron Rich's mech guide, although, it may not cover my specific model - I am hoping there may be enough info to help at some point.
I measured the various solenoid resistances and they are within range, and free moving.
What should I look at first after I get the analog VOM?
TIA!
Andrew
Does either of the manuals provide a theory of operation guide? You appear to have two distinct problems.
1) Write-In - see page 84 of the M100A manual #404874, and Troubleshooting starting on page 92.
2) Read-Out Cancel - see page 76 of the M100A manual #404874, and Troubleshooting starting on page 92.
If you are missing those pages then you have an incomplete manual.
John :-#)#
On 2025-05-20 2:26 p.m., Andrew Burkhart via Jukebox-list wrote:
After having much success with getting a couple of Rockola machines operational, I am now getting into the Seeburg world!
I have a Seeburg M100A that was converted to 45 play with the CalCoin kit, and which I intend to convert back to 78. I have 2 manuals for the machine, one from Victory Glass (the nicer manual) and the other from Jukebox Arcade (has some extra info than the VG one).
My machine has two issues as I can tell:
- When making any selection, the selected pin is not moving into the
play position. I can manually trip a pin and the machine will go to that selection and play. 2. After playing a selection, the record is put back in the rack but the pin is not canceled, and the mech will search and go to the same selection to play. I manually cancel the pin and the mech will stop, as it should.
The credit system is adding credits with coins as it should, and removing credits when a selection is made. And the amp is working well.
I do not have an analog VOM yet, but one is coming soon, and I believe I need that to help diagnose this issue from what I have read on various forums.
I am seeking guidance for the two issues presented above, and would like to know if the subsequent models B and/or C are in any way similar to the Model A as to the pinbank operation when searching for info on the web.
I have also ordered Ron Rich's mech guide, although, it may not cover my specific model - I am hoping there may be enough info to help at some point.
I measured the various solenoid resistances and they are within range, and free moving.
What should I look at first after I get the analog VOM?
TIA!
Andrew
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Hi John,
It turns out that I already had tabs on some of the pages you mentioned, and I will add the other pages to the list of things to check. The Victory Glass / AMR Publishing manual appears complete (It is part # 404874).
I haven’t attempted any work on these issues yet pending arrival of parts, equipment, and time for me to absorb the operation of each circuit, other than general cleaning & maintenance.
Thank you for pointing me in the right direction, John. Much appreciated!
Andrew
On May 20, 2025, at 3:20 PM, John Robertson via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Does either of the manuals provide a theory of operation guide? You appear to have two distinct problems.
Write-In - see page 84 of the M100A manual #404874, and Troubleshooting starting on page 92.
Read-Out Cancel - see page 76 of the M100A manual #404874, and Troubleshooting starting on page 92.
If you are missing those pages then you have an incomplete manual.
John :-#)#
On 2025-05-20 2:26 p.m., Andrew Burkhart via Jukebox-list wrote: After having much success with getting a couple of Rockola machines operational, I am now getting into the Seeburg world!
I have a Seeburg M100A that was converted to 45 play with the CalCoin kit, and which I intend to convert back to 78. I have 2 manuals for the machine, one from Victory Glass (the nicer manual) and the other from Jukebox Arcade (has some extra info than the VG one).
My machine has two issues as I can tell:
- When making any selection, the selected pin is not moving into the
play position. I can manually trip a pin and the machine will go to that selection and play. 2. After playing a selection, the record is put back in the rack but the pin is not canceled, and the mech will search and go to the same selection to play. I manually cancel the pin and the mech will stop, as it should.
The credit system is adding credits with coins as it should, and removing credits when a selection is made. And the amp is working well.
I do not have an analog VOM yet, but one is coming soon, and I believe I need that to help diagnose this issue from what I have read on various forums.
I am seeking guidance for the two issues presented above, and would like to know if the subsequent models B and/or C are in any way similar to the Model A as to the pinbank operation when searching for info on the web.
I have also ordered Ron Rich's mech guide, although, it may not cover my specific model - I am hoping there may be enough info to help at some point.
I measured the various solenoid resistances and they are within range, and free moving.
What should I look at first after I get the analog VOM?
TIA!
Andrew
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
-- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
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Ron's mechanism guide will be of marginal help. He only covers the 45mechanisms. There are a lot of differences between the 45 and 78 machines.Same basic concepts of operation, but lots of little differences. Seeburg manuals are excellent on theory of operation. I had a problem with my M100Aafter getting the selection receiver rebuilt. It wasn't moving the selection levers when a selection was made. It turned out to be a dirty contact in theselection receiver. I've had this machine since 1975, but I never would havefigured it out if I didn't have the manual. The lever should be cancelled as the last operation as the tone arm sets down on the record. Can't tell you off thetop of my head where the pulse comes from though. You've really set yourself a chore in trying to convert this machine back. Yourbest bet might be to find a trashed machine with a complete 78 mechanism andusing that in yours.
David Breneman david_breneman@yahoo.com
On 2025-05-21 7:07 a.m., David Breneman via Jukebox-list wrote:
Ron's mechanism guide will be of marginal help. He only covers the 45mechanisms. There are a lot of differences between the 45 and 78 machines.Same basic concepts of operation, but lots of little differences. Seeburg manuals are excellent on theory of operation. I had a problem with my M100Aafter getting the selection receiver rebuilt. It wasn't moving the selection levers when a selection was made. It turned out to be a dirty contact in theselection receiver. I've had this machine since 1975, but I never would havefigured it out if I didn't have the manual. The lever should be cancelled as the last operation as the tone arm sets down on the record. Can't tell you off thetop of my head where the pulse comes from though. You've really set yourself a chore in trying to convert this machine back. Yourbest bet might be to find a trashed machine with a complete 78 mechanism andusing that in yours.
David Breneman david_breneman@yahoo.com
I convert the M100As to 33-1/3 LPs, much more interest in that!
One just has to use a motor speed control design to get the turntable motor to spin at the right speed only while playing the record.
Mostly I hack that, but next time I'll probably make it into a module...
John :-#)#
On Wednesday, May 21, 2025 at 10:13:51 AM PDT, John Robertson via Jukebox-list jukebox-list@lists.netlojix.com wrote:
I convert the M100As to 33-1/3 LPs, much more interest in that!
One just has to use a motor speed control design to get the turntable motor to spin at the right speed only while playing the record.
Mostly I hack that, but next time I'll probably make it into a module...
When I got my M100-A it had been converted to LPs. The conversion consisted ofa new gear set (which I gave to Wes at Jukebox Junkyard in partial trade for the78 gears) and 45 styli in the pickup. It sounded absolutely awful. But unlike the45 conversions, it was very easy to switch back.
John,
Do you use the original cartridge on a 33 1/3 conversion? If so, how do you get it to play stereo records without damaging them? (I know you have a solution for this!)
Andrew
I convert the M100As to 33-1/3 LPs, much more interest in that!
One just has to use a motor speed control design to get the turntable motor to spin at the right speed only while playing the record.
Mostly I hack that, but next time I'll probably make it into a module...
John :-#)#
-- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
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David,
The mech guide will come in handy on my next Seeburg juke, I suppose.
So, the conversion back to 78 will take longer than the hour most conversion kits say it takes to make it play 45’s? ; )
Luckily, I have purchased a mech from an unconverted hideaway version of the 100A, and hope that all the original parts can be found on that! Sounds like you also did a re-convert back to original? Any tips for that?
I like a good challenge!
Andrew
On May 21, 2025, at 7:07 AM, David Breneman via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Ron's mechanism guide will be of marginal help. He only covers the 45mechanisms. There are a lot of differences between the 45 and 78 machines.Same basic concepts of operation, but lots of little differences. Seeburg manuals are excellent on theory of operation. I had a problem with my M100Aafter getting the selection receiver rebuilt. It wasn't moving the selection levers when a selection was made. It turned out to be a dirty contact in theselection receiver. I've had this machine since 1975, but I never would havefigured it out if I didn't have the manual. The lever should be cancelled as the last operation as the tone arm sets down on the record. Can't tell you off thetop of my head where the pulse comes from though. You've really set yourself a chore in trying to convert this machine back. Yourbest bet might be to find a trashed machine with a complete 78 mechanism andusing that in yours.
David Breneman david_breneman@yahoo.com
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
On Wednesday, May 21, 2025 at 07:41:52 PM PDT, Andrew Burkhart via Jukebox-list jukebox-list@lists.netlojix.com wrote:
The mech guide will come in handy on my next Seeburg juke, I suppose.
So, the conversion back to 78 will take longer than the hour most conversion kits> say it takes to make it play 45’s? ; )> Luckily, I have purchased a mech from an unconverted hideaway version of the 100A, > and hope that all the original parts can be found on that! Sounds like you also did a> re-convert back to original? Any tips for that?
I'm not saying the mechanism guide is a wasted purchase. Just that the 45 mechanism ismore (and in many cases less) than a miniaturized 78 mechanism. Getting the hideawaymechanism is a good move. It should be a drop-in replacement, and all you'll need are the trim parts. The problem with the 45 conversion kits is that so many of the original piecesended up being thrown away, it's almost impossible to find what you need to re-convert itwithout going the route you are. All of the discarded pieces are coveted by other M100-Aowners.
My conversion was very simple. Just replace the drive gears and the styli. That was it.Many years later I had to have the pickup rebuilt. Wes at Wes-Tech did that in exchangefor a second damaged pickup I had. Mine was the first one he did, and I guess he wantedto get as much experience as he could before going commercial with it, : -) I've heardconflicting stories as to whether the new owners are still rebuilding Seeburg pickups. I hope they are, because it seems that eventually the armature on one side or the otherwill fail. I'm dubious of the aftermarket solution, which has two pickups mounted back toback. That leaves the A-side pickup in continuous back-cue mode, which is usually aformula for cue burn when done by radio and club DJs.
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