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(Topic ID: 292030)

Mistake in Williams System 6 Driver Board Assembly Drawing?

By manples

3 years ago



Topic Stats

  • 7 posts
  • 6 Pinsiders participating
  • Latest reply 3 years ago by robertmee
  • Topic is favorited by 1 Pinsider

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#1 3 years ago
OP
 
BAB

manples

Pinside member

FR Montpellier

7y 34,300 148 3

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).JPGDB1 (resized).JPG
DB2 (resized).JPGDB2 (resized).JPG

what I think the drawing should show :

DB3 (resized).JPGDB3 (resized).JPG

Post last edited 3 years ago: “corrected "schematic" with "assembly drawing"”

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#2 3 years ago
 
MAC

Sheprd

Pinside member

11y 62,650 547

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

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#3 3 years ago
 
MDF

frenchmarky

Pinside member

US Moreno Valley, CA

5y 79,800 3,113 7 30

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

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#4 3 years ago
OP
 
BAB

manples

Pinside member

FR Montpellier

7y 34,300 148 3

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

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#5 3 years ago
 
DLD

Dent00

Pinside member

US Ridgeland, MS

5y 55,550 929 1 5

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

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#6 3 years ago
 
INK

Inkochnito

Pinside member

NL Piershil

12y 91,650 3,169 12

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.

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#7 3 years ago
 
RM

robertmee

Pinside member

US Raleigh, NC

12y 82,800 6,430 15 9

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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