(Topic ID: 336080)

WPC 95 12v unregulated F109 keeps blowing

By sfspanky

11 months ago


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Topic Stats

  • 66 posts
  • 9 Pinsiders participating
  • Latest reply 11 months ago by sfspanky
  • Topic is favorited by 1 Pinsider

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7 opto TOTAN (resized).jpg
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#2 11 months ago

Doubtful.
What would the coin door need 12VUR for?
Perhaps a DBA?

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
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#6 11 months ago

There are several 4 pin connectors like J141.
Over time, they get mixed up so the connections shown in the manual can't be trusted.
If you've physically traced the wire, that's a good thing.
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Chris Hibler - CARGPB #31
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#9 11 months ago

Are you saying it may be that it should be connected to J140 instead of J141? Both supply 12+v and ground according to the schematics

Yes sir. J139, J140, and J141 are all four pin connectors with identical pinout.
They can be interchanged freely, and often are.
You may have to connect those connectors one at a time to figure out which one is causing the fault.
--
Chris Hibler - CARGPB #31
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#13 11 months ago

Make sure that the electrolytic cap on the (edit) 7-Opto board is not leaking. That cap often leaks and can cause the behavior noted.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
Thank you for checking out the PinWiki - http://www.PinWiki.com/

#24 11 months ago
Quoted from DumbAss:

For WPC-89, this is much more common due to layout.
For WPC-95, it can happen but the electrolytic capacitor is above the heat sink and the regulator and traces are quite far below.

DumbAss
Sorry. Imprecise wording and corrected. I meant the cap on the 7-opto board.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
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#25 11 months ago

If you can't post the pic of the 7 opto board, email it to me at chrishiblerpinball AT gmail.com
A picture is worth 1000 words.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
https://www.youtube.com/c/ChrisHiblerPinball
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#52 11 months ago

The blue bar coded shrink is probably factory. The barcode allows quick identification of what it is used for.

Power off.
Clip the leg of the smoked diode that is not connected to the header.
Meter on DC volts.
Black tucked under ground braid.
Power on.
Red meter probe on the the still attached diode leg.

What voltage are you reading?

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
Thank you for checking out the PinWiki - http://www.PinWiki.com/

#55 11 months ago

And that is fine.
That is the unregulated 12V.
I was hoping for something more.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
Thank you for checking out the PinWiki - http://www.PinWiki.com/

#57 11 months ago

It that I can think of.
It is quite a head scratcher.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
Thank you for checking out the PinWiki - http://www.PinWiki.com/

#60 11 months ago

Are those chromed cannons on you game?
If so, where did you obtain them from?
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
https://www.youtube.com/c/ChrisHiblerPinball
http://www.PinWiki.com - The Place to go for Pinball Repair Info

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