9 pin cable from option slot in 1930 display?

[Anonymous]

I've got a 1930 display with 4' open array that came with my boat. There is a 1 meter 9 pin cable that goes into the back of the display in the option slot below the dj-1 connector. i opened the case, and the cable goes to a connector on a small board on the top right hand side of the chassis. this small board has 6 grey wires (hard connected) that run down to connector r45 of the spu-7880 board. it also has another 6 pin connector (blue, grn, yellow, orange, red, brown) that looks like it connects to the deflection board.

does anyone know what this cable is for?

thanks
Joe

 

[Johnny Electron]

Way back when, there was a device (long obsolete) called the RP110. It would allow you to use the radar CRT screen as basic plotter, and then switch back to using it as a radar. Your 1930 radar (currently 22-26 years old) appears to had one connected in the past. Since you can't get charts for the RP110, they most likely disconnected and disposed of it.

 

[Anonymous]

Thanks for the info.