(Topic ID: 265206)

Demo Man reset issues


By jardine

3 months ago



Topic Stats

  • 15 posts
  • 5 Pinsiders participating
  • Latest reply 3 months ago by schudel5
  • Topic is favorited by 3 Pinsiders

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#1 3 months ago

Hey guys. Just wondering what to look for with resets on my DM.

After around 10-20 games maybe it just fails. Last time it hasn’t been able to turn back on!

I currently have the 5v plug in J120 which should be keeping the resets at bay?!?

Originally I though maybe a shorter coil was setting this off. Could this be the case again?

Please help. Loving the game but this is constant!

#2 3 months ago

https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Game_resets

work the list. There's no "short cut" for this issue. What are you talking about putting 5v plug in J120 keeping resets at bay? Sounds like a hack.

#3 3 months ago

J120 is a general illumination connector for lighting. Probably why the game won't turn on.

#4 3 months ago

It’s the daughter board that I have in. Sorry for the vagueness.

J210 is where it’s plugged in. Apologies.

https://www.kahr.us/daughterboard.html

#5 3 months ago

My answer doesn't change. Work the list on pinwiki.

The daughterboard at best is a band aid that props up underlying issues for years but the underlying issues are still there, and you're now at the point where they need to actually be addressed.

On the plus side, it might be something REALLY simple like the connectors. Once you fix it, put the Kahr board away for another day, you don't need it at all on a properly working machine.

#6 3 months ago

The Kahr board can't bypass the connectors at J101, J102 and J114 on the power driver board nor does it bypass a failing C31 on the CPU. So if any of those are bad you'll still have issues.

#7 3 months ago

Thanks guys. I'll work through that link but being a little noobish.......hope you don't mind a few more questions along the way.

#8 3 months ago

Just a quick update. Worked through points 1-3 at this stage. Cleaned the connectors and reset everything.

Switched on the machine and it fired up!

The auxiliary readings out of interest were 241.3v on and 240.8v off. Remembering I’m in Australia!

I did however find this damn mess while taking the opportunity to change over some none working flashers!!!

Could this have cause the machine to reset at all? And yes, that’s a standard bulb not led. Possibly looks like the old casing that’s been melted once before and they just placed a new one over it to conceal it?

I’ve disconnected it for the moment to see if this rectifies the issue?!?

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#9 3 months ago

Still going through the link above with regards the steps.

I wanted to confirm that when it says to measure pin 32 of the game rom is this U6 (blue stickered rom)? And how can I find pin 32 to ensure that I am making the right reading please.

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#10 3 months ago

Pin 1 on an IC is the furthest top right pin when the notch is pointing to the right. 32 should be the bottom right pin.

#11 3 months ago
Quoted from jardine:

I currently have the 5v plug in J120 which should be keeping the resets at bay?!?

More and more, people are finding out this "magic bullet" isn't the "miracle board" everyone proclaimed it to be.

Think of it this way, OP: when you find the issue, now you know how to PROPERLY fix the issue.

The board is great for a quick fix to get through a pinball party/tournament. It is NOT a proper way to fix the issue. Even the creator of the board has come out and said that.

Not dogging you, OP. Just makes me sigh every time I see that board as a "permanent fix".

#12 3 months ago
Quoted from NPO:

More and more, people are finding out this "magic bullet" isn't the "miracle board" everyone proclaimed it to be.
Think of it this way, OP: when you find the issue, now you know how to PROPERLY fix the issue.
The board is great for a quick fix to get through a pinball party/tournament. It is NOT a proper way to fix the issue. Even the creator of the board has come out and said that.
Not dogging you, OP. Just makes me sigh every time I see that board as a "permanent fix".

All good npo It was recommended to try it originally. Just to see if this would fix the error. Clearly the fact that it reset WITH the daughter board in place meant I needed to do more digging.

I'm trying to work through it as you can see from above. My knowledge is limited however and I guess there's heaps of guys like me who would rather a quick fix than have to remove boards and check solder joints and repin this and look for dry that.

Noobs like me really don't quite know what to look for and it all can become a little over whelming.

I do appreciate the help and I am trying not to be that guy who looks for the quick fix.

#13 3 months ago
Quoted from jardine:

All good npo It was recommended to try it originally. Just to see if this would fix the error. Clearly the fact that it reset WITH the daughter board in place meant I needed to do more digging.
I'm trying to work through it as you can see from above. My knowledge is limited however and I guess there's heaps of guys like me who would rather a quick fix than have to remove boards and check solder joints and repin this and look for dry that.
Noobs like me really don't quite know what to look for and it all can become a little over whelming.
I do appreciate the help and I am trying not to be that guy who looks for the quick fix.

Yep, you're learning now. And trust me, I have much to learn too. If you're going to own WPC class of 92 to 98 pins, you HAVE to know how to diagnose things, fix and replace molex connectors, crimping new pins, using a DMM, measuring voltage across a solenoid, how to determine if something is grounded, measuring 5V and 12V where and when, etc.

Trust me, I don't know everything. Thank goodness for Clay's manuals and his videos at Pinball Ninja. Those videos are absolutely AMAZING resources. Inside tip: $20 with him gets you access to his knowledge (videos) for life. It's well worth the price of admission - trust me!

There are NO quick fixes for maintaining these pins. People who want the glory day B/W games must know and learn this stuff. Kudos to you for going through the motions and putting this time in. Some people would just sell the game and move on. You'll get this problem knocked out soon!

#14 3 months ago

Just put a pause on this as my trough board needs a quick repair.

Any thoughts on the flasher photo above? I have played 35 games and no reset with this flasher unplugged.

#15 3 months ago

No correlation between that flasher and resets. You probably reseated some connections and that made a difference for now.

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