hardware power question

[steeter1058]

I have a printer I want to use with a Keyboard Display Unit. The KDU documentation says my printer is compatible but "These models require a jumper change on the printer’s main logic board to provide 5v power for the KDU. A +5VDC power source at 750mA can be supplied on pin 9. This type of change would require the cover of the printer to be opened." Can someone guide me on how to do this?

 

[helpstar]

Which printer brand and model is it?
Did you search youtube for it?