74 Williams Star Pool player stepper problem?

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Archived from groups: rec.games.pinball (More info?)

Ok im confused right now and need some clear thinking. My player step
up unit is not firing the coil to step up the player. I have cleaned
the player unit ant it is functioning manually no binding, coil the
same way. Checked cleaned and adjusted the score motor contact,
cleaned checked and adjusted the player reset relay, clean checked and
adjusted the balls relay. Now i went to check the coil, if i touch my
ohm meter to the two solder joints i can get a reading. If i touch it
to one solder joint and one copper wire going into the coil, i get a
reading. If it touch it to the two copper wires going into the coil i
get no reading. So,, am i looking at a bad coil?

marty

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

In article <1120665874.764725.140120@g43g2000cwa.googlegroups.com>,
"ctsteps5" <ctsteps5@yahoo.com> wrote:

> Ok im confused right now and need some clear thinking. My player step
> up unit is not firing the coil to step up the player. I have cleaned
> the player unit ant it is functioning manually no binding, coil the
> same way. Checked cleaned and adjusted the score motor contact,
> cleaned checked and adjusted the player reset relay, clean checked and
> adjusted the balls relay. Now i went to check the coil, if i touch my
> ohm meter to the two solder joints i can get a reading. If i touch it
> to one solder joint and one copper wire going into the coil, i get a
> reading. If it touch it to the two copper wires going into the coil i
> get no reading. So,, am i looking at a bad coil?
>
> marty

If I understand correctly, you're trying to get a reading off the leads
to the coil, which are magnet wire. Magnet wire has a clear insulation
coating, so you won't see any conductivity in your test.
A better thing to do is to turn the machine on and see if there's any
voltage on either side of the coil, then trace back to the relay and
do the same thing, and so on until you find the bad contact or broken
wire or whatever.