[Jukebox-list] Seeburg Switch Contacts

[Bob E.]

I'm still ironing the kinks out of this Seeburg DS-160, it's having
selection problems in the write-in side of things.  I did the battery trick
and it tried to play every postion, so the read-out side seems to work OK
(and it was good for giving the recently-lubed mechanism a workout, too!).

I have the keyboard switch assembly (TES-168, Code A) out on the table, and
I see that it has problems with a couple of left-bank letter switches (A -
K).  As those of you who have worked on these know, when the switches are
out, there is a daisy-chain of contact from one switch to the next right
down the line, when you press a button it interrupts the chain at that point
and connects to the normally-open contact for that switch position.  You can
see that if there is a problem with the "pass-along" contacts, the switches
downstream will all be dead.  I have a couple of these that are giving problems.

My question is, just how much voltage and current is being switched here?
If there is a circuit problem, is it possible that one of these switch
contacts will get "cooked"?  I have two that have darkened metal on the
contacts, and they seem to not take well to being tweaked into a position to
make better contact.  I don't know how much current it takes to "set" a
toroid, but it sure doesn't seem like it would be enough to darken and
remove the springiness from a slide-switch contact, does it?  I may need to
look into getting another switch-bank from somewhere...

--Bob
=======================================================================
Bob Ellingson					bobe at halted.com
Halted Specialties Co., Inc.			http://www.halted.com
3500 Ryder St.					(408) 732-1573
Santa Clara, Calif. 95051  USA			(408) 732-6428 (FAX)