Photo: robin
  1. » Forum
  2. » Tech
  3. » Tech: Alpha-numeric
  4. » DE Simpsons display issue - segment stuck on
(Topic ID: 120799)

DE Simpsons display issue - segment stuck on

By bestofthebunch

9 years ago


Topic Heartbeat

Topic Stats

  • 11 posts
  • 3 Pinsiders participating
  • Latest reply 9 years ago by barakandl
  • No one calls this topic a favorite

You

Linked Games

Topic Gallery

View topic image gallery

image.jpg

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

0
0
0
#11 9 years ago
 
AMS

barakandl

nvram.weebly.com

12y 132K 10,414

OP
Quoted from bestofthebunch:

New display board in and it's all working perfectly so just need to know what to look at on old board to fix it
Cheers
Brian

Follow the segment drive. Check the decoder output and compare to other segments. If the decoder is working, it is probably the UDN chip. Don't touch the probe to the -100v side of the circuit. Just the 5v logic level side. You can use your DMM to get a good idea if the HV driver is working. Just compare average voltages. if it is stuck at -100, then that is the problem if the decoder output is good.

Promoted items from Pinside Marketplace and Pinside Shops!
$ 54.99
Cabinet - Shooter Rods
ORANGE Lighted Shooter Rod Plate Cover for Data East
Lighted Pinball Mods
 
$ 35.00
Cabinet - Other
3D Coin Reject Buttons - The Simpsons (DE)
Rocket City Pinball
 
From: $ 19.99
Eproms
The Simpsons Pinball (Data East '90) - ROM Upgrade chip set
Matt's Basement Arcade
 
$ 99.99
Lighting - Other
The Simpsons Stern Glowing Instruction Cards
Lighted Pinball Mods
 
$ 12.99
Playfield - Toys/Add-ons
Data East Simpsons Pinball Cooling Tower Brackets - Set of 6
Daddio's 3D Printed Mods
 
3,200
Machine - For Sale
The Simpsons
Boca Raton, FL
MarcelG
$ 39.99
Playfield - Toys/Add-ons
Data East Simpsons Pinball Cooling Towers New Design - Gray
Daddio's 3D Printed Mods
 
From: $ 40.00
Lighting - Interactive
Pinduino Dataeast/Sega Version 3 KIT DIY
Professor Pinball
 
$ 15.99
Playfield - Toys/Add-ons
Data East Simpsons Pinball Bowling Pin Pop Bumper Cap
Daddio's 3D Printed Mods
 
$ 39.99
Playfield - Toys/Add-ons
Data East Simpsons Pinball Cooling Towers New Design - Red
Daddio's 3D Printed Mods
 
Trade
Machine - For Trade
The Simpsons
Myrtle Beach, SC
rockburch
$ 44.95
Playfield - Toys/Add-ons
3D Flipper Caps Mod for Simpsons Pinball Party
PinBoss Mods
 
$ 18.95
Eproms
ROM SIMPSONS -CPU
Pinballrom
 
$ 27.95
Eproms
ROM SIMPSONS -SOUND
Pinballrom
 
$ 25.00
Cabinet - Other
The Simpsons Pinball Party Coin Door Reject Buttons
Filament Printing
 
$ 18.95
Eproms
ROM SIMPSONS -GAL/PAL-SOUND
Pinballrom
 
$ 5.00
Playfield - Protection
Trough Anti-Magnetic Shim Acrylic - Data East / SEGA
UpKick Pinball
 
$ 50.00
Playfield - Protection
Simpsons Glass Cover
Duke Pinball
 
From: $ 159.00
Playfield - Toys/Add-ons
TSPP Video Display TV
Sparky Pinball
 
$ 39.99
Playfield - Toys/Add-ons
Data East Simpsons Pinball Cooling Towers New Design -Yellow
Daddio's 3D Printed Mods
 
Hey modders!
Open a free Shop and start selling on Pinside
Your shop name here

You're currently viewing posts by Pinsider barakandl.
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/de-simpsons-display-issue-segment-stuck-on?tu=barakandl 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.