Wico 72-4461 pattern generator info

KenLayton

In Memoriam
Joined
Dec 14, 2003
Messages
20,220
Reaction score
712
Location
Olympia, Washington
The Wico Corporation catalog number 72-4461 is a raster monitor pattern generator. It is for using with color raster monitors and black & white raster monitors used in commercial coin op video arcade games.

Originally supplied with two pre-made testing cables to feed the signal from the generator to the monitors. One cable was for black & white monitors and the pattern generator passed 120 volts AC through this cable to also power the monitor directly. The other cable was for color raster monitors (standard resolution only, this unit cannot do other resolutions). Color monitors need to powered seperately with an isolation transformer as the provided cable only feeds the pattern generator signal to the monitor.

This pattern generator only generates POSITIVE sync output and was originally intended for use with Wells-Gardner monitors and the Electrohome G07 monitor since they could accept positive sync. The instruction sheet and schematic are here:

http://www.ionpool.net/arcade/wico/wico_raster_generator.pdf

I modified mine years ago to a selectable positive or negative sync via a small internal add-on circuit board I built and a toggle switch. I also built an extra cable wired for negative sync.

I'm attaching pictures of my unit.
 

Attachments

  • Wico 1.JPG
    Wico 1.JPG
    38 KB · Views: 55
  • Wico 2.JPG
    Wico 2.JPG
    42.5 KB · Views: 38
  • Wico 3.JPG
    Wico 3.JPG
    54.5 KB · Views: 42
Last edited:
More pictures. The sync inverter chip is a 74LS04 integrated circuit.
 

Attachments

  • Wico 4.JPG
    Wico 4.JPG
    46.4 KB · Views: 44
  • Wico 5.JPG
    Wico 5.JPG
    60.5 KB · Views: 43
  • Wico 6.JPG
    Wico 6.JPG
    44.6 KB · Views: 46
Pictures of the cables.
 

Attachments

  • Wico Blk wht cable.JPG
    Wico Blk wht cable.JPG
    68.2 KB · Views: 28
  • Wico positive cable.JPG
    Wico positive cable.JPG
    59.4 KB · Views: 27
  • Wico negative cable.JPG
    Wico negative cable.JPG
    66.8 KB · Views: 22
figuring that these pics were a result of our PM's, thanks.. I like the pattern selector switch. I just need to find a replacement for the toggle that was on mine.
 
These units do show up on ebay occasionally. I figured this information would be of help to other folks as well.

Originally these were designed to output POSITIVE sync, but I modified mine to be more useful with more modern ones by making the sync selectable Positive/Negative.
 
Back
Top Bottom