GR / SC Test Print Sends Solid Rectangle! HELP

[gillje]

Here's one -

Riso SC7700 Computer Interface with Manuals | eBay

[blagodaria]

Hello . I know this may not be the best place to post but i really need help connecting the Riso gr3770 37 pin to SC7700. So i dont have a cable and i wish to make one, the 36 pin plug that goes to the SC7700 is is easy to find and i will wire it directly to the 37 pins in the Riso but i need wiring diagram for those pins. If anybody has such a cable could you please test it and let me know how the pins in the cable are connected?. thank you so very much for any help