Re: Night Rider SS Schematics?

Well shoot, I entered a long post, and I guess I hit the wrong
button. Let's try again...

Here's what I'd do:

1) make darn sure the fuse is a 1A SLOW BLOW

2) leave the 2 solenoid driver connectors off.

3) Verify no continuity to ground on each of the skinny wires going to
the coils, on the non-banded side of the coil's diode. If you have
continuity, then there's a short to ground somewhere on that skinny
wire, which will make the coil energize on powerup. However, I would
thing you'd have a couple of seconds before the fuse popped in this
case.

4) Verify no continuity to ground on each of the fat wires (1 or 2) on
coil, on the banded side of the diode. If you have continuity, this
is bad as there's a direct short to ground on the solenoid power bus.
The probably WOULD pop the fuse right off the bat, even a slow blow.

5) Starting at the playfield fuse holder, trace the wire (solenoid
power bus) wherever it goes, and look for any shorts, bare wire
touching other stuff, etc.

if you can tell which coil is energizing when you turn it on, that
would be a good place to check too. I doubt it's a shorted coil since
there should be no path to ground w/ the solenoid driver connectors
unplugged. Sounds to me like a short on the power bus if the fuse
pops right off the bat.


Hey Del - I'd like a copy of those schematics! :-)


steve (hitting the proper button this time)
---
Steve Kulpa (cargpb10)
Hermitage, TN
http://www.geocities.com/stevekulpa/faces/rgpidx.htm - Faces
http://www.geocities.com/stevekulpa/pinball.htm - Pinball


.

Relevant Pages

  • Attn: Jumpster Jiver - Ohmite VT4-F
    ... It appears the fuse socket ... The fuse has continuity. ... to 140 and back while feeling the dial and looking at the brush. ... and gently wipe the lapped wire mating surface. ...
    (sci.electronics.repair)
  • Re: Attn: Jumpster Jiver - Ohmite VT4-F
    ... It appears the fuse socket is broken and had no continuity between the front of the fuse under the cap and the terminal. ... look at the lapped surface of the windings (where it meets the brush) and look for burn marks or discontinuities. ... and gently wipe the lapped wire mating surface. ...
    (sci.electronics.repair)
  • Attn: Chris - Ohmite VT4-F Variable Transformer
    ... It appears the fuse socket ... The fuse has continuity. ... to 140 and back while feeling the dial and looking at the brush. ... and gently wipe the lapped wire mating surface. ...
    (sci.electronics.repair)
  • Re: Stargate Coil Woes
    ... If F20 is the fuse blowing then the transistor for the center kicking target ... The power side (usually thicker wire and two of them) gets the ... I replaced the coil with a new one from PBR. ...
    (rec.games.pinball)
  • Re: Stargate Coil Woes
    ... If F20 is the fuse blowing then the transistor for the center kicking target ... The power side (usually thicker wire and two of them) gets the ... Once you've got the correct orientation of the wires to the coil ... When I got the game, this coil was burned out and had stuff melted in ...
    (rec.games.pinball)