[Jukebox-list] Seeburg C not cancelling pins - A side only

[Wesley Dean]

    Aaron, this is a common problem on early Seeburg jukes with a lot of cam wear. Because the 'A' side contains more hits, the cams wear more when playing this side. If you will notice when playing this side, the cam assembly will jump forward and close the 'SC' switch too fast and shorten the reset pulse. I have found two remedies for correcting this. One is to modify the brake cam to offer more resistance when the cam is moving to play position. The other is to install a 'pulse stretcher' circuit consisting of a small relay and capacitor. 
    The correct way would be to replace the cam assembly. Wes  
----- Original Message ----- 
From: "Aaron's Email" <aaron at vertasource.com>
To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
Sent: Saturday, March 31, 2007 9:20 AM
Subject: [Jukebox-list] Seeburg C not cancelling pins - A side only


> Morning all,
> It's not often that I digress away from telling the world about the
> excellence of the AMI F and G series jukeboxes, but an embarrasing snafu at
> a house party last night involving my Seeburg C is forcing me to swtich
> gears.
> 
> Everything was going great until the mech stopped cancelling pins on the A
> side only. After listening to Horst Jankowski's "Walk in the Black Forest"
> about 5 times, and "You're So Fine" by The Falcons about 6 times, I realized
> that there's no way my 5 year old neice could have pressed A1 and C1 that
> many times. So I checked the machine and sure enough, no A side pins were
> cancelling. This morning, I checked the contact block and found that it was
> still adjusted properly as per the "Contact Block Alignment" in the manual.
> I also checked IC switches and those seem OK as well. In fact, depending on
> where the reverse switch is located, I can manually close IC and hear the
> contact block solenoids energizing - but the stronger one of the two is the
> B side solenoid.
> 
> After playing a record and sitting behind the mech and watching,  I noticed
> that the A side solenoid seems very week....like it's barely getting enough
> juice to move the plunger up to cancel the pin. In fact, sometimes it
> doesn't even move at all. Could it be that the solenoid is shot, or is there
> another adjustment that I need to check to see that the solenoid is getting
> power. I checked the reverse switch and it's polished clean and gapped
> properly. Any thoughts?
> 
> Hmmm....I just realized that I didn't even take the Christmas music out of
> it. Perhaps I should play this one a little more and not wait until I have a
> house full of people. :)
> 
> Aaron
> 
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