Anyone on the board here maybe able to help or offer suggestions on what to check / try next in diagnosing this switch issue??

Thread link from ccgc...

http://www.cgcc.ca/forum/viewtopic.php?p=191942#191942


Thanks in advance for any suggestions
John

Your problem COULD be one of the other swicthes in the same row. 46-48.

Mike

I think that switches 48 and 47 are unused..and switch #46 is the playfield tilt switch which I didn't disconnect...I just checked the diode on it and checked to make sure the switch itself was good and no loose wires.

Maybe I will try disconnecting it from the switch matrix and see if the results differ,

Thanks for your input.


Add-on:  
  
I disconnected the blue-green column wire on the playfield tilt switch,,,,so that all blue-green wires are disconnected from switches 42-46 and #47& 48 are unused.....I hooked up switch #41 and ran the switch test....when I close switch 41 all switches in the same row as #41 all show closed...
No love....

Here is my current wiring of switch #41...can anyone confirm if this is correct??

It's wired correctly although it's already closed and shouldn't be.  Make sure that you have the plastic tubes inside the switch stack that prevent the metal screw from shorting the switch blades.  Check for blobs of solder on the switches too.  You may have to check continuuity in all 4 switches with a multimeter.  You probably have 1 that's shorted.  There should be NO continuity between any of the 3 blades (when disconnected and diode removed).

Are all the switches already closed like this one?  Maybe they're just ALL CLOSED and it's not a short!!

Mike

What I'd like to know is what the hell is inside that shrink tubing?  Another diode?  AFAIK there should only be one diode on a switch like this.  (maybe that is the source of your problems)

D

The shrink tubing is just the two white wires for the connection that are put together and made into a single wire....
Looks like the white wires wewre cut short at one time and someone soldered them together with another wire extension and
put shrinktube on it.

The switch isn't closed but it sure looks like it in the pic...mst be the angle I shot it at.

I will take apart the switches and check them....to be sure the plastic spacer is in there and check continuity..

Thanks for the ideas.
John

I'm sorry I've missed this, but you verified that the other switches on the same line in the matrix are working, right?

That switch looks like a**.. lots of sloppy solder, maybe you've got a short somewhere on there

Currently all of the switches in that column have the column wire removed except switch 41...the first one in the column.
Just with switch 41 hooked up, when I close switch 41 it shows all switches in that same row closed.

I haven't bothered reconnecting the other switches in that column until I figure out whats going on here now.
Originally when all switches were connected, if I closed any switch on that column , every switch on the same row as the closed switch
showed closed.

The switch in the photo is a bit fugly...I am cleaning it up tonite and checking it again....but when I checked it for no continuity last nite,
it checked OK...only had continuity when the switch was closed..it didn't seem shorted

John

Quoted from John Jones

Currently all of the switches in that column have the column wire removed except switch 41...the first one in the column.
Just with switch 41 hooked up, when I close switch 41 it shows all switches in that same row closed.

I haven't bothered reconnecting the other switches in that column until I figure out whats going on here now.
Originally when all switches were connected, if I closed any switch on that column , every switch on the same row as the closed switch
showed closed.

The switch in the photo is a bit fugly...I am cleaning it up tonite and checking it again....but when I checked it for continuity it seemed OK.

John

Well if you've confirmed that there is no short in the switch, then the diode must be shorted on.  Also form that picture it does seem like there's another diode under the heat shrink attached to the white wire.  There should not be another diode.

If you find that switch 41 is all good then maybe look at the row instead.  Switches 11,21,31,41,51,61,71,81

Mike

Yikes!....looking closer I think you are correct....it sure looks like a diode in the shrinkwrap...
I guess I should have looked closer before AND after I shot the photo....
Wow, missed that all together....I will have to remove that tonite for sure.

John

Quoted from John Jones

Yikes!....looking closer I think you are correct....it sure looks like a diode in the shrinkwrap...
I guess I should have looked closer before AND after I shot the photo....
Wow, missed that all together....I will have to remove that tonite for sure.

John

That's exactly what I was referring to in my original post.  Rip that heatshrink off an let us know what you find.  (my $$ is on a diode)

D