Best Haunted House ground mod ?


By SUPERBEE

3 months ago


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  • 27 posts
  • 10 Pinsiders participating
  • Latest reply 3 months ago by SUPERBEE
  • Topic is favorited by 3 Pinsiders

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    #1 3 months ago

    Need to do the ground mods on a Haunted House and I've noticed there are a few variations. Which one do you consider to be the best and also easiest to do (I know these won't necessarily go hand in hand ) . Im pretty good with everything but board work so is it something I should be doing ?

    -1
    #3 3 months ago

    Never owned one but the process is covered in detail in the TOP 5.1 and 5.2 DVD's by Clay. Doesn't appear too hard.

    52 (resized).jpeg

    #4 3 months ago

    Hi Superbee,

    I did a fair bit of research before I did the ground mods on my Black Hole (which has the same boards as Haunted House). I tried to find the most unobtrusive attachment points on each of the boards for the ground wire. Most of these attachment points are on the components rather than on the boards themselves. I ran a single wire from the attachment point on each board to a common point on the inside of the head to tie the grounds together and also attached the ground wire from the bottom of the cabinet to this point. This way you do not have to worry about sanding back the cold plate of the power supply to use as the point to tie the grounds together.

    Here are the attachment points on each board:

    Power supply (left hand side): 20180214_222809 (resized).jpg

    CPU (left hand side): 20180214_222017 (resized).jpg

    Driver board (upper right):20180214_222031 (resized).jpg

    Sound board (upper right):20180214_222134 (resized).jpg

    Speech board (Haunted House doesn't have this board):20180214_222155 (resized).jpg

    Tying the grounds together at a common point in the bottom of the head:20180214_222231 (resized).jpg

    #5 3 months ago

    And in the above picture, move that factory green ground wire from the lock assembly to where all those added ground wires are mounted.

    Personally I like to have the central ground Closer to the boards. Because if you have to remove one of those boards with the added ground wire, the way it’s pictured above kind of makes it a pain in the ass

    #6 3 months ago

    That's exactly what I needed. I was hoping I didn't need to solder directly to the board. Thanks so much guys.

    #7 3 months ago

    Well you do need to solder the ground wire directly to the boards. You don’t have to do all the ones that are pictured above. The main ones are the power supply, CPU board, driver board. Those are mandatory. The soundboard and the light chaser boards aren’t really as important. That is, if they have a connector/ground issue on them, the game is it going to burn up a coil and start on fire. The only thing that happens there is maybe your sound doesn’t work or the back box chaser lights don’t work. Which is nothing compared to smoking a coil and burning up transistors

    #8 3 months ago

    Maybe someone will do the same (Illustrated) of the earlier system80 boards. I know you have them on Clays repair site and pinwiki but, it is a very clarifying way of how it's done a little differently

    #9 3 months ago

    Flippers.com has an illustrated grounding guide too.

    Added a wire coming up from the cabinet transformer panel ground strip to the bundle of new ground wires in the head. Did a bunch of System 80 ground mods this year, for games that have run ok for 25+ years without the mods.

    #10 3 months ago

    the easiest way is to look it this youtube film #227 Gottlieb HAUNTED HOUSE pinball machine with 3 levels of play! TNT Amusements

    #11 3 months ago
    Quoted from Biffbar:

    Did a bunch of System 80 ground mods this year, for games that have run ok for 25+ years without the mods.</blockquote

    I have often wondered if the mods are truly needed within a home environment, in a commercial setting makes good sense to me due to the number of hours they are on each day. No offense to anyone who thinks otherwise as I myself have done the mods to my own pins, just stating my thoughts on the subject.

    #13 3 months ago
    Quoted from scaryflippers:

    the easiest way is to look it this youtube film #227 Gottlieb HAUNTED HOUSE pinball machine with 3 levels of play! TNT Amusements

    I've seen TNT's video but I like the idea of grounding each board which they do not.

    #14 3 months ago

    What if you have a pascal all-in-one board are any mods necessary?

    #15 3 months ago

    no you have to do nothing be sure your connectors are 100% ok

    #16 3 months ago
    Quoted from RWH:

    I've seen TNT's video but I like the idea of grounding each board which they do not.

    it's your decision how you wanna do it

    #17 3 months ago

    I personally do not suggest the TNT ground mod by themselves. It’s a very minimalistic approach and frankly I just don’t think it’s enough. In adding grounds to three boards literally takes 10 minutes at most. I don’t really see the downside. Doing what Todd suggests, personally, I think is in adequate

    #18 3 months ago

    Another way to implement the Ground Mod to your Haunted House. These are taken from my own Haunted House. The brown wire is running to the metal groundstrip at the bottom of the cabinet. I would also recommend to double up the +5V and GND connections between driverboard and CPU board.

    I do NOT recommend to use the power supply's heatsink as a Ground Plane as you are creating a potential short with the +12V (at the housing of the metal transistor mounted on the heatsink). The heatsink should stay as designed: floating.

    WP_20180214_18_29_39_Pro (resized).jpg

    WP_20180214_18_29_54_Pro (resized).jpg

    #19 3 months ago
    Quoted from SUPERBEE:

    That's exactly what I needed. I was hoping I didn't need to solder directly to the board. Thanks so much guys.

    I think you will be better off soldering to the back of the boards, plus I think it looks better also.

    #20 3 months ago

    i have plenty off Gottlieb pinballs ant no problem whit tnt ground mods l

    #21 3 months ago

    The TNT ground mod, by itself, is totally inadequate. It relies on using connectors which basically already failed to do the job once. It would be like crashing your car into a ravine, and then crashing another one into the ravine again, like that’s going to help.

    The whole reason the ground mods are required is because this style of connectors don’t fare well with time and have basically failed. All you’re doing with the TNT mod is using the same unreliable connectors. You’re just doubling them up. That is not a way to solve this problem. Fool me once my fault. Fool me twice, you’re an idiot

    #22 3 months ago
    Quoted from cfh:

    And in the above picture, move that factory green ground wire from the lock assembly to where all those added ground wires are mounted.

    I just added another wire connecting the factory green ground wire at the lock assembly down to common point the bottom of the head.

    Quoted from cfh:

    Personally I like to have the central ground Closer to the boards. Because if you have to remove one of those boards with the added ground wire, the way it’s pictured above kind of makes it a pain in the ass

    That's true, it does take a bit more maneuvering if you have to remove a board when they are wired this way.

    Quoted from MarAlb:

    I would also recommend to double up the +5V and GND connections between driverboard and CPU board.

    Yes, do this in addition to the ground mods I posted above.

    #23 3 months ago

    Lots of great replys guys. Appreciate it. Not sure which approach im going to take yet.

    Quoted from GRUMPY:

    I think you will be better off soldering to the back of the boards, plus I think it looks better also.

    This is true. Maybe i will solder direct to the boards.

    #24 3 months ago

    This is the first of a few things that need to be done.

    #25 3 months ago
    Quoted from GRUMPY:

    This is the first of a few things that need to be done.

    Yeah, a few other things will be needed for sure. Just finally getting into this beast. I know the orange cap under the playfield has been changed . Still need to repin some of the connectors under the playfield and in the head. What else should be on the top of the list ?

    #27 3 months ago

    Excellent. Thanks Grumpy.

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