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O2 Composite Video Mods - Type 1 & 2 PCB Designs Available


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#1 Ikrananka OFFLINE  

Ikrananka

    River Patroller

  • 3,101 posts
  • Location:Canada

Posted Tue Apr 23, 2019 3:07 PM

As I promised in my past posts on the subject of composite video mods for the O2, below are links to the PCB designs for my Type 1 and Type 2 composite video mods.

 

Feel free to use these for any purpose.  However, if you do use these to sell as assembled boards in quantity for commercial means then I only request that you retain the existing text, logo and acknowledgements on the boards.

 

Type 1

https://oshpark.com/...ojects/ZQUIxxju

 

Attached File  Type 1 Front.png   9.92KB   1 downloads Attached File  Type 1 Back.png   10.68KB   1 downloads

 

Type 2

https://oshpark.com/...ojects/FafCfQvJ

 

Attached File  Type 2 Front.png   11.19KB   1 downloads Attached File  Type 2 Back.png   10.28KB   1 downloads

 

Installation

I used the instructions here with the following modifications.

  • I left the keyboard ribbon cable attached to the motherboard and did NOT disconnect it.  These are old cables and are prone to being damaged upon removal and reinsertion.  If in doubt leave it attached and just carefully lift and flip the motherboard over to connect the video mod wires while being careful to not strain the ribbon cable.
  • When wiring I used the following colours:
    • Red = +5V
    • Yellow = Video
    • Black = GND
    • White = Audio
  • The picture below shows where I soldered the mod inputs and outputs:

    Attached File  DSC02631.JPG   971.51KB   1 downloads
     
  • Completely remove the RF box and the RF cable but keep all of the screws that held it in place.
     
  • Install the mod board onto the two posts nearest to the corner of the console as shown in the picture below.  Ensure that you use the nylon washers as shown (2 in the top hole and one in the bottom) before screwing the PCB into place.

    Attached File  DSC02640.JPG   616.79KB   1 downloads
     
  • I also screwed the existing white ground wire that went to the RF box into place as shown - just as a convenient means to hold it in place somewhere - it serves no purpose after removing the RF box.

Edited by Ikrananka, Tue Apr 23, 2019 3:08 PM.





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