Looking for working Williams DMD for pin

tophatne1

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I have a Getaway HS2 that needs a new DMD. Anyone have a compatible one for sale?

I have a lot of things to trade also if you want to get something interesting.

I have tons of console stuff from my "to sell on ebay" stash that I would be willing to offer in trade. Lots of console items. Systems, games, manuals, books, guides etc. Some rare stuff. I have lots of Star Wars items... Brand new Disney club exclusive DVDs of older films... Older fisher price toys... Old heavy metal albums... very good 80's MP3 collection on discs...and just a bunch of other stuff. Everything is worth something since everything I get I do so with the intent of reselling on ebay.
If you let me know your interests I'm sure I could offer up something good!

As far as arcade items I have to trade the list is short:

- Coors Light Bowiling Jamma board - working
- Converted CP for a Williams cabinet. Was Robotron converted to Rastan. Would need a complete overhaul.
- Several Red Ball Tops in various brands and sizes.
- Moon Patrol Marquee in great condition.
- Centipede/Millipede/Missile Command screen printed marquee on vinyl. (fits Centipede cab)

I would be willing to pay for one as well but a trade would be a little better since I am now on my 3rd month without a REAL job! lol

Anyway, let me know what you have and your asking price.

PS**If anyone in the Schenectady NY area wants to help a totally clueless guy with his first pin let me know because I can sure use it!!

Thanks!
 
Pinball newbie question #1.

How would I check the driver board without a working DMD to plug into it?

I have seen a bad Dot Matrix controller board blow a new DMD. With your existing dead DMD I would check the voltages as described in Clays Guides (http://www.marvin3m.com/fix.htm)

Do the following:

[FONT=verdana,arial,helv,helvetica][SIZE=-1]Testing DMD Voltages.
If the fuses are good on the dot matrix controller board (or audio/visual board for WPC-95), you should next check the power at the DMD itself. Voltages used are +62, +12, +5, -113 and -125 (or -103 and -115), or within +/- 10% of these values. Check these voltages at the dot matrix display with the display connected, or at connector J604 on the controller board. The pin out at the DMD is: [/SIZE][/FONT]
  • [FONT=verdana,arial,helv,helvetica][SIZE=-1]
  • Pin 1: -125 volts (-110 to -130 volts); Williams lowered this voltage to -115.
  • Pin 2: -113 volts (-98 to -118 volts); Williams lowered this voltage to -103.
  • Pin 3: Key
  • Pin 4: Ground
  • Pin 5: Ground
  • Pin 6: +5 volts (4.9 to 5.2 volts)
  • Pin 7: +12 volts (10 to 14 volts)
  • Pin 8: +62 volts (58 to 68 volts)[/SIZE][/FONT]
[FONT=verdana,arial,helv,helvetica][SIZE=-1]All voltages should be pretty much right at the above specs, or within +/- 10%. In regards to the -113, -125 volts (or -103, -115), these two voltages need to be 12 volts apart - that's the important part. That is, if -98 and -110 volts are measured, those two voltages are fine. If -118 volts is measured, the other voltage should be -106 volts. If they are not within 12 volts of each other, the dot matrix controller's high voltage section probably needs to be rebuilt. If the -125 volts is missing, -113 volts will be missing too. If the +62 volts is above 70 volts, chances are good someone jacked up this voltage by changing the DMD controller 1N4759 zener diode to compensate for an outgassed dot matrix display (very common on games imported back to North America from other countries). [/SIZE][/FONT] [FONT=verdana,arial,helv,helvetica][SIZE=-1]If any voltage is low, try disconnecting the power connector to the DMD, and re-measure the voltages. If they return to the correct voltages, the display is bad or the high voltage section on the dot matrix controller board is failing and can't handle the power draw of the display. [/SIZE][/FONT]
[FONT=verdana,arial,helv,helvetica][SIZE=-1]Remember the voltages created by the DMD controller card are -125, -113 (or -115, -103) and +62. The +5 and +12 volts come from the driver board. If the 5 volts is missing yet the game boots, there's a connector problem. If 12 volts is missing there's either a connector problem, or the dot matrix display itself is "sinking" the 12 volts (disconnect the DMD power connector and see if the 12 volts comes back up, if so the display is bad or maybe the driver board 12 volt section is failing). Or the 12 volt driver board section is failing. (Measure the 12 volts at the driver board, and then at the installed DMD, if the voltage is different there is a connector problem. If they are both the same voltage and are below 10 volts, there is a driver board 12 volt problem).
[/SIZE][/FONT]


[FONT=verdana,arial,helv,helvetica][SIZE=-1]Make sure the fuses on your DMD controller board are good. If they are check the voltages. If the voltages are correct then go ahead and buy a new DMD. If not I would either rebuild the HV section of your DMD controller board.
[/SIZE][/FONT]
 
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