Photo: pinballphotos
  1. » Forum
  2. » Tech
  3. » Tech: Early solid state
  4. » Williams System 3-6 Master Display Segment Issue
(Topic ID: 170307)

Williams System 3-6 Master Display Segment Issue

By spaceport

7 years ago



Topic Stats

  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 7 years ago by spaceport
  • Topic is favorited by 2 Pinsiders

You

Linked Games

Topic Gallery

View topic image gallery

IMG_0038 (resized).JPG
IMG_0039 (resized).JPG
IMG_0041 (resized).JPG

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

0
2
2
#2 7 years ago
 
???

Spybryon

Pinside member

12y 55,550 1,189

The problem could be on IC9 or upstream of IC9.

Check IC9 pin 15 with game in the display test, with volt meter. Be very careful of high voltages when working on displays with -100vdc!

Volt meter set to volts, black probe connect to cabinet ground. Red probe connect to IC9 pin 15. What voltage do you measure on this pin? Does it ever change? Compare to another output pin such as pin 14 or pin 16. It should be changing around between -100vdc and maybe -27vdc.

Next repeat the same exact test but put the red probe connect to IC9 pin 4 (the logic input). Does it alternate between 0volts and 5vdc?

Promoted items from Pinside Marketplace and Pinside Shops!
Trade
Machine - For Trade
Firepower
Washington Court House, OH
JT-Pinball
2,900 (OBO)
Machine - For Sale
Firepower
Hawesville, KY
PLAYMASTER
600 (OBO)
Machine - For Sale
Firepower
Casper, WY
fireonfireoff
From: $ 5.00
Cabinet - Other
Firepower Coin Door Inserts
UpKick Pinball
 
From: $ 1.00
Playfield - Other
Black Posts (for accent colors on playfields!)
Rocket City Pinball
 
1,400 (Firm)
Machine - For Sale
Firepower
Benton, PA
blbarchik
From: $ 9.00
Boards
Williams System 3-7 compatible Volume Controls
KAHR.US Circuits
 
$ 42.95
Eproms
ROM FIREPOWER -SOUND
Pinballrom
 
$ 15.00
Playfield - Protection
Firepower Slingshot and Center Target Plastic Protectors
UpKick Pinball
 
$ 170.00
Displays
Led Display Williams Sys 3 4 6, 4x6Num+CM
Digipinball Shop
 
From: $ 90.00
Tools
Pincoder Adapter Rev 1.1
Pincoder Store
 
$ 27.95
Eproms
ROM FIREPOWER -CPU
Pinballrom
 
$ 20.00
Electronics
Power Supply Cap Kit Williams System 3-6 with Diodes
Yorktown Arcade Supply
 
From: $ 11.00
Playfields
NMP--Sensors for Williams 1ST Generation Drop Targets
Troxel Repair
 

You're currently viewing posts by Pinsider Spybryon.
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/williams-system-3-7-master-display-segment-issue?tu=Spybryon 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.