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Author Topic: WMS Model 400 - New to me and not working  (Read 1406 times)

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Offline jsawyer

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WMS Model 400 - New to me and not working
« on: June 13, 2022, 07:08:07 PM »
I was given a WMS 400 machine that I am trying to see if I can get working.

It has power and looks to be complete.

The first issue that I can see right off is that some of the wires have been disconnected.

I have found the service manual but it does not have a wiring diagram. I know that two of the wires should go to the front door switch but I am not sure which of them.

It looks like switch wires are black with a stripe but what color should the stripe be? There are two sets of black wires that are unhooked.


Offline jsawyer

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Re: WMS Model 400 - New to me and not working
« Reply #1 on: June 13, 2022, 10:07:39 PM »
Ok, did some digging and I found that what I think are the correct wires had been stripped a couple of inches back from the spade connectors and twisted together. That should function as an always closed switch.

I think that there are power issues. The LEDs on the boards are not lit are blinking with a clicking noise coming from the speakers.

I pulled the power supply and it has all of the original caps. It is only 26 years old but it is in the range where caps start going bad.

Are schematics for these machines available? I did not see anything that looked like test points and I am not familiar with the WMS slots. I know their pinball machines from that era inside and out but they do not seem to share much in common.

Offline tollguy316

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Re: WMS Model 400 - New to me and not working
« Reply #2 on: June 13, 2022, 10:58:48 PM »
A few pics would be really helpful at this point. If LED's arr not lit, them a power supply would be my first guess.

Offline Sunrise Side

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Re: WMS Model 400 - New to me and not working
« Reply #3 on: June 14, 2022, 04:40:13 AM »
PS fail is most common problem with most slots and same for this model. The PS module caps and the small caps on the power distribution board may need replaced.

Offline Trisail

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Re: WMS Model 400 - New to me and not working
« Reply #4 on: June 14, 2022, 05:19:27 AM »
Here is a link that may help with recapping the power supply.

https://newlifegames.com/nlg/index.php?topic=31351.0

PM me if you need caps or help with repair.
Tony

You can fix almost any electronic device by replacing the aluminum electrolytic capacitors.

Offline jsawyer

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Re: WMS Model 400 - New to me and not working
« Reply #5 on: June 14, 2022, 09:56:53 AM »
I am going to have to order caps. They are not the same caps that the WMS pinball and video games use. I have some of them on hand but not all of them.

There is an article about scabbing in an ATX power supply but I do not see why that would be required. I do not see anything on this power supply that is not fixable.

Offline Trisail

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Re: WMS Model 400 - New to me and not working
« Reply #6 on: June 14, 2022, 10:50:24 AM »
Yes they are repairable.  Just getting hard to find so the ATX solution looks good to get a machine running. PM me your address I can ship you the caps you are missing unless you want a bunch of extras for future. I have a lot.
I have the 1 Meg resistors too that seem to fail on most I have repaired. Other parts too if you want to replace almost everything.
Tony

You can fix almost any electronic device by replacing the aluminum electrolytic capacitors.

Offline jsawyer

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Re: WMS Model 400 - New to me and not working
« Reply #7 on: June 14, 2022, 11:31:00 AM »
I appreciate the offer. I need to put in a Mouser order anyway. I am getting low on sockets and a few other components.

It looks like there were schematics in the file section of the old .net site. Did they make it to the file section of this site?


Offline Trisail

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Re: WMS Model 400 - New to me and not working
« Reply #8 on: June 14, 2022, 11:40:50 AM »
Yes they are in the file system. I have collected a few too. I will see about uploading them.

If you become a contributing member you will have access to the downloads and classifieds posting.
Tony

You can fix almost any electronic device by replacing the aluminum electrolytic capacitors.

Offline jsawyer

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Re: WMS Model 400 - New to me and not working
« Reply #9 on: June 14, 2022, 11:53:22 AM »
I had read that. I was just trying to figure out which sites are worth contributing to.

I have posted to a few and this one is the only one that seems to be active.


Offline jsawyer

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Re: WMS Model 400 - New to me and not working
« Reply #10 on: June 14, 2022, 12:06:53 PM »
I see the service manual but it does not include schematics.

Offline Trisail

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Re: WMS Model 400 - New to me and not working
« Reply #11 on: June 14, 2022, 12:38:57 PM »
Here is the PS  link in the file system

https://newlifegames.com/nlg/index.php?action=downloads;cat=21

 :yes:
Tony

You can fix almost any electronic device by replacing the aluminum electrolytic capacitors.

Offline jsawyer

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Re: WMS Model 400 - New to me and not working
« Reply #12 on: June 14, 2022, 02:00:37 PM »
Thank you. I was trying to find a full schematic for the machine. I had not thought to look for just the power supply.

 

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