(Topic ID: 292030)

Mistake in Williams System 6 Driver Board Assembly Drawing?

By manples

1 year ago



Topic Stats

  • 7 posts
  • 6 Pinsiders participating
  • Latest reply 1 year ago by robertmee
  • Topic is favorited by 1 Pinsider

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DB3 (resized).JPG
DB2 (resized).JPG
DB1 (resized).JPG

#1 1 year ago

Maybe I'm wrong but I think I discovered a mistake in the Williams Driver Board Assembly Drawing for at least Firepower and Blackout (which I own).

As I was replacing resistors/diode/relay for my unresponsive flippers in my Blackout, I noticed resistor R20 is showing twice : once by Q9, and once by Q13 (flippers control).

R20 is a 68 ohms resistor but it's definitely not the right one for the flippers control. There, we should have the R26 10k Ohm. I removed mine and measured it at 10k ohm (I replaced it anyway)

No big deal as maybe only 5 people in the world had ever changed resistor R26 but in the idea of sharing knowledge, I thought this could be useful info

What I see on the Assembly Drawing :

DB1 (resized).JPG
DB2 (resized).JPG

what I think the drawing should show :

DB3 (resized).JPG

#2 1 year ago

Good find. It's an error on the "Assymbly" drawing, not the schematic. You might as well call it out correctly if you are going to point out an error

#3 1 year ago

Same goof is in my Black Knight manual, and it's a sys 7.

#4 1 year ago
Quoted from Sheprd:

Good find. It's an error on the "Assymbly" drawing, not the schematic. You might as well call it out correctly if you are going to point out an error

You are absolutely right. Corrected

#5 1 year ago

Wow... Hard to believe no one found that since 1980!
Makes you wonder how many more errors are there that we don't see.

#6 1 year ago

It is also in the original scanned layout.
I see it on the layout in Black Knight, Contact and Disco Fever too.
It looks like Phil Butcher from www.firepowerpinball.com just copied the error.

#7 1 year ago
Quoted from Dent00:

Wow... Hard to believe no one found that since 1980!
Makes you wonder how many more errors are there that we don't see.

Most of the WMS manuals and schematics from the 80s and 90s era have these types of errors. Proofreading wasn't their strong suit. Black Rose as an example has several egregious errors on which connectors are used and their pin outs. BSD has similar errors.

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