(Topic ID: 179326)

Data East DMD display corruption

By johnstewart

7 years ago



Topic Stats

You

Linked Games

Topic Gallery

View topic image gallery

dedsprom (resized).jpg

You're currently viewing posts by Pinsider johnstewart.
Click here to go back to viewing the entire thread.

#1 7 years ago

After getting my LW3 working (replaced a power supply: https://pinside.com/pinball/forum/topic/data-east-lw3-dmd-possible-power-issue-1), I now find that after a little while of running, the bottom right of the DMD with "free play" and ball count gets corrupted. Video here:

My guess is that now with slightly higher voltage on +5 (I think 5.14, versus 4.94 with the old power supply), some RAM on the DMD CPU board is unhappy. I think replacing a RAM chip there might be the best next step.

Does that sound right? Or should I be looking elsewhere?

#5 7 years ago
Quoted from mikat11:

I had the same problem with my LW3.I purchased the updated eproms for the MPU version 2.08 and display driver version 2.06 from John Wart Jr and that cured it. His stuff is on eBay if you want to go that route or contact him from this site. The old display driver setup used 2 eproms and the newer version has 1 eprom. The new one is for ROM 0 in the U 12 position.R11 must be cut out for proper operation.. It is a zero ohm resister/ jumper wire.

Aha! I'm glad others are/were in the same boat! I just IMed John Wart Jr to see if he had these; thanks!

Found this page now since posting this response:

http://www.thatpinballplace.com/eproms/de.html

Which one did you buy, mikat11? "USA CPU 2.08 (C5), USA Display 2.06 (ROM 0)"?

thanks!!

2 weeks later
#7 7 years ago

FYI, I installed the Pinball Place ROMs last night (had to cut R11, moving from two to one display ROM), and it fixed the issue.

I'm a bit sad that it says "TRI-BALL" now instead of "MULTI-BALL", but at least it works!

1 week later
#9 7 years ago
Quoted from Mahoyvan:

Took this image from online... You had to cut that resistor or whatever out? Anything else?

Yep, I found a doc explaining it, but yes that's all I did, was cut one of the legs on the R11 resistor.

I covered the lead in electric tape instead of cutting it out completely, in case I had to put it back.

Promoted items from Pinside Marketplace and Pinside Shops!
3,800 (OBO)
$ 18.95
Eproms
Pinballrom
 
$ 1.00
Pinball Machine
Pinball Alley
 
From: $ 99.99
Cabinet - Other
Lighted Pinball Mods
 
From: $ 209.00
$ 15.00
Playfield - Plastics
Pinball Haus
 
2,500 (OBO)
Machine - For Sale
Milwaukee, WI
$ 17.50
Playfield - Plastics
Pinball Haus
 
$ 27.95
Eproms
Pinballrom
 
$ 85.00
Playfield - Plastics
Pinball Haus
 
$ 17.50
Playfield - Plastics
Pinball Haus
 
$ 15.00
Playfield - Decals
Metal-Mods
 
3,995 (OBO)
Machine - For Sale
Rochester, MN
4,995 (OBO)
Machine - For Sale
Plantsville, CT
From: $ 9.99
Eproms
Matt's Basement Arcade
 
$ 5.00
Playfield - Protection
UpKick Pinball
 
$ 27.95
Eproms
Pinballrom
 
$ 18.95
$ 28.50
Playfield - Plastics
Pinball Haus
 

You're currently viewing posts by Pinsider johnstewart.
Click here to go back to viewing the entire thread.

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from https://pinside.com/pinball/forum/topic/data-east-dmd-display-corruption?tu=johnstewart and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.