[Jukebox-list] (no subject)

[Jens Hultgren]

A-F sounds like a 120 selection model.
You may have to take the pulse converter apart and clean the segments and
wipers, on both sides of the boards. Then the wipers should be adjusted so
that they are centered on the segments. If they are on the edge of some
segments (say C and D) than it can miss some selections.
Be forewarned that the rotating wipers are held by hex nuts, and if you
loosen these the black plastic they're mounted in is brittle and prone to
crack. And then you're in more trouble (anyone reproduce these??). Probably
better to just reach in there with a cotton pin soaked in alcohol and clean
up.
The wipers are fragile too, often the ends are broken off, but I think those
are available new now.

With a trained ear, you can hear if the pulse trains are ok or if it is
missing some segments. The pulse generator wiper must be clean and have some
pressure against the segments. The circular board is sometimes warped....

There are so many things that can go wrong on these electrical selectors,
making them sometimes a real headache to get working reliably. ESPECIALLY if
the owner has been there and tinkered with all the adjustments. So the
manual selector is much, much simpler. But then you can not use a wallbox.


      Jens (in Sweden)

On 1/9/07, Ron Rich <ronnnrich at yahoo.com> wrote:
>
> Karl,
>   Those models operate just like a  'remote wallbox". They have a "pulse
> generator" and a "pulse converter".  The generator is what is found in a
> wallbox (or, in this case, the "selector" inside these model phono's. It
> "pulses" various times depending on the letter number combination selected.
> The "converter" is called a "stepper" by most other brands. It follows the
> pulses (or "steps-up") and "converts" it into a form that can then be used
> to "pull" the selected pin. Different companies used different "pulse
> trains" to achieve this, but they all used two "stepper gears" (or "wheels")
> and sliding contacts, of some type, to "matrix" the info.
>   It sounds like the "alignment" may be slightly off, or one or more of
> the sliding contacts on the rear of the converter are bent/broken.
>   Hope that clears it up--a little. Ron Rich
>
> Karl <karlh44 at knology.net> wrote:
>   Well, I wound up with this AMI Model H. I have gotten most things to
> work on it but I am having trouble with the selection system. It will Select
> the correct record for letters A & B and E & F but not C & D. I have the
> manual but I am having a hard time understanding the "Pulse" concept. It
> sounds like it allows the converter to rotate longer or shorter depending on
> the letter/number chosen??? I admit this is probably fairly elementary to
> those who know these older jukeboxes, but I don't. if I understood what is
> supposed to happen, I'd probably stand a better chance of figuring out why
> it isn't happening...hehehe. Any help would be appreciated.
>
>
> Karl
> Columbus Coin-Op Shop
> Columbus, GA 31903
> (706) 507-2963
> 2061 S. Lumpkin Rd.
>
>
>
>
>
> Columbus, GA 31903
> (706) 507-2963
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