(Topic ID: 169160)

WPC89 Board Locations on Test Fixture


By NJGecko

2 years ago



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  • 7 posts
  • 4 Pinsiders participating
  • Latest reply 2 years ago by Chrizg
  • Topic is favorited by 1 Pinsider

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    WPC_Test_Fixture _(16-584T-101)_October_1990.pdf (PDF preview)
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    #1 2 years ago

    I recently got my greedy hands on a WPC89 factory test fixture. I also have a copy of the manual and a few pictures of how it's "supposed" to be laid out, but the standoffs don't seem to be in the right places for some of the boards.
    Can anyone give me any pointers on how it's supposed to be laid out? I'd hate to drill new standoff holes and move them around.

    The previous owner got very creative with lots of double sided tape and velcro. I'd like to have this put together the right way where I can work on boards without having to stick them places and do crazy cable routing. But if I need to re-drill standoffs, I'm OK with that.

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    #2 2 years ago

    You're in luck--I've been researching test fixtures lately, and have been hunting down example photos of each one.

    Each WPC fixture tends to be slightly different, depending upon how it was modified.

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    #3 2 years ago

    It's very interesting to see that the standoffs seem to have very little bearing on the boards. Most of the pictures you have show the boards kind of sitting on the box.

    My take is I will likely have to take the "homeless" boards and relocate the standoffs.
    I have the CPU, power driver, and display driver boards matching standoffs, but the ribbon cable routing is a little wacky when you also include the sound board.

    Very interesting that it's not a one-size-fits-all. Especially with regards to the DMD. And especially against the manual.

    #4 2 years ago

    Some are modified with additional lamp matrixes and switch matrix testers, some are modified to use both alphanumeric and DMD displays, some are modified for fliptronic boards. There was a pre-made add-on kit for the fliptronic board, but I'm not sure about the rest. I guess board locations really depend on how a previous owner made modifications.

    Maybe there's a later revision for the test fixture manual? The only one I found was from October 1990. That's before the first DMD game was released.

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    WPC_Test_Fixture (16-584T-101)_October_1990.pdf

    #5 2 years ago

    This particular test fixture was created with a Funhouse/BOP style display, a pre DCS sound board, no fliptronics support and no DMD support.

    It was modified along the way. Generally, the CPU and driver board stay in the same place. The display driver for the BOP era display goes to the left of the CPU. Mine has the DMD driver above the standoffs for the BoP era display driver. And I swap out fliptronics and sound boards as needed.

    DCS sound boards don't exactly fit right, so you have to get a little creative. I keep a couple chunks of foam and cardboard around to keep boards from shorting on each other if I pack it 'full'.

    Most test fixtures that evolved over time suffered a similar fate. If you look at a WMS 3-6 fixture that was later modified for Sys7 support, an external board with displays and controller and partial harness was added. My sys9 fixture had the displays for P1 and P2 swapped out for A/N because I use it primarily for Sys11, and I added a backboard with Sys9 boards as well as dual 16 digit displays like ES uses, and there's space on the backboard for a DMD and controller for DE style CPU boards.

    A tech has to be flexible.

    I have some ideas for modifying mine in mind, but right now I am working on fixing boards and building out a new workshop, so stuff that works but is a little cumbersome just has to stay for that way in the meantime.

    #6 2 years ago
    Quoted from ForceFlow:

    Some are modified with additional lamp matrixes and switch matrix testers, some are modified to use both alphanumeric and DMD displays, some are modified for fliptronic boards. There was a pre-made add-on kit for the fliptronic board, but I'm not sure about the rest. I guess board locations really depend on how a previous owner made modifications.
    Maybe there's a later revision for the test fixture manual? The only one I found was from October 1990. That's before the first DMD game was released.

    There were revisions added and modifications made. I believe my manual for the WPC 89 tester includes dot matrix modifications, and I bought a factory fliptronics tester kit, that came with cables, a manual addendum, and a new ROM.

    2 months later
    #7 2 years ago

    Just picked up a WPC and WPC95 test fixtures. Unfortunately they 95 is is missing the audio vis board. The WPC looks complete except for the funhouse style controller for alpha displays. Trying to decide what to do with these.

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