EPOI Digitrol Enlarger Timer

[Cchroback]

Hey guys,

I recently picked up a secondhand EPOI digitrol digital enlarger timer. I’ll attach a picture. Cosmetically it looks brand new, but functionally I’m having some issues. The knobs don’t seem to change the number on the screen and the expose button is not starting the count down. It seems like a great timer so I’m having a hard time parting with it. Does anyone have experience troubleshooting these timers/how do I go about finding someone to fix it?

 

[wiltw]

It could simply be that rotary knobs are variable resistors and the expose button are all suffering from the same issue that oxidation on the contacts is interfering with electrical contact, so the variable resistor wipers are not wiping along the resistor windings and the electrical switch is not closing properly. You might start with using electrical contact fluid on the contact surfaces.