RE: Wico XY Pattern Generator - Decoding Switches

Dave - You rock! Thanks to everyone else too.
I've schematic captured based upon your schematics; Dave - many thanks. The only peices I haven't captured are the PSU, the 2nd page, and diode switch matrix.
 
Some questions came up while "re-engineering" the schematics.
 
@A-7 on page 1; R3 topside is listed as a NC... I'm guessing this is incorrect as why would anyone put a resistor without a second conection?
My Guess is that R3 ties to +5V like the other two (R4, R5).
 
IIRC; something was "off" when I wired U2 @ D-6. I think you had Q2 and Q3 pins swapped. I'll look for sure when I get home.
 
The Power supplies weren't pictured for U14, 15, and 16. These Opamps are tied to the +12 and -12 rails?
I plan on simulating the opamps to try to gain insight as to what they are doing.
 
Seems odd that the DAC08s are driven from a non-linear voltage rail. IE V+ is 5V and V- is -12V. I'd have thunk they rails would be symetrical. IE +/-12V. Maybe the opamps linearize it?
 
Can anyone get me some rail power measurements?
I'm going to try and do away with the transformer and linear regulators in favor of a more complex (yeah; I know K.I.S.S) PWM psu which puts our all three rails.
If I knew what the average current was for each rail; a small PWM might be nice and cheap.
 
I *so* wish this was an opensource hardware project ... I'd so like to release my PCB and schematics (assuming it works) to the public.
<sigh>
 
John

From: dfish_1@comcast.net
To: vectorlist@vectorlist.org
Subject: RE: VECTOR: Wico XY Pattern Generator - Decoding Switches
Date: Mon, 7 Nov 2011 17:05:13 -0500

John,
 
I already have mine apart on my desk. I’m looking at it now. I’m taking lots of pictures.
 
Dave
 

From: owner-vectorlist@vectorlist.org [mailto:owner-vectorlist@vectorlist.org] On Behalf Of John Robertson
Sent: Monday, November 07, 2011 4:49 PM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Wico XY Pattern Generator - Decoding Switches
 
David Fish wrote:
John,
 
Before you mirror the schematics let me take a look at them in depth. It was a looooooong time ago when I drew them.
 
Unfortunately, I no longer have the schematic source file or access to PADS schematic cap even if I did. I looked at them online and yes, something looks screwy about the switch board to main board connector pinout. I’m thinking there’s a reversed connector involved here. I’ll let everyone know what I find.
 
Dave
I have a working WICO XY Pattern Generator if you need any pictures (either of you) just let me know and I'll crack it open...

John :-#)#

From: owner-vectorlist@vectorlist.org [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Mark Shostak
Sent: Monday, November 07, 2011 2:44 PM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Wico XY Pattern Generator - Decoding Switches
 
You can mirror the schematics from ionpool

On Mon, Nov 7, 2011 at 12:43 PM, John Robertson <pinball@telus.net> wrote:

Zitt Zitterkopf wrote:

I’m looking at the schematics for the Wico XY Pattern Generator; and can seem to figure out how the Front panel PCB connects to the Main Board.

At A-8 on the main schematics page; it shows P3-1-8 as connected to the D Flip Flops and the A10 of the U7/U8 pattern generating roms.

However, P3 doesn’t seem to connect correctly to the “cable” connected to the front panel board at B-8 on the second page.

It appears that the diode matrix appears to drive set/clear to Dflip flop U6-A which controls A9 on the ROMs.

But I’m unsure of the encoding given I can figure out how “P3” connects to the Front panel board.

Anyone have an idea?

John
Do you have a copy of the schematics so I can put them up on TTL? The manual (such as it is) is there along with images of the Eproms.

ftp://ftp.flippers.com/TTL/TestEquipment/WICO

Thanks,

John :-#)#

-- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"
 
                                                
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Received on Mon Nov 7 17:36:51 2011