I got a dead Vectrex on my desk. I quickly figured out a malfunctioning power switch, which seems to be quite common for that console. I think I've read about that a couple of times on different pages. The switch consists of a 10K potentiometer (volume) with a double power switch attached to the bottom of it. It's quite some work to get it out of the console, since its soldered onto the logic board (3 pins). And there are four wires leading to the switch. There is nut, which holds the potentiometer firmly connected with the housing.
What's inside the switch? Can it be repaired?
If you open the switch all kinds of parts fall out of it . On the picture you see the right order.
If you start to reassemble from the bottom side, it looks like this:
You can see the two contacts and all the parts which convert the rotary movement of the knob into an up & down movement of the contacts, including a spring ZONG.
The silver metal piece is moved left and right by a plastic nose of a submerged plastic disk inside the potentiometer, behind the half circular slot. The plastic nose should be between the two sides of the catch - you see?
If you'd be building up the switch from the other side, It would look like this:
With some practice the switch can be reassembled.
Unfortunately, in the case of my console, after reassembling, I only could switch on one time. Switching off blocked. I'm wondering, if there is a second plastic nose supposed to be on that plastic disk, for switching off. I did not want to disassemble a working switch of another console and have a look inside. Maybe I can figure out someday in the future.
Instead I ordered a replacement part, which seems to be fitting quite well. I'll report, when the part will be delivered. Maybe there are other people who are looking for such a spare switch, too. I could order some switches and dispatch. But let's wait for the switch to arrive first...
Edited by Rolo, Mon May 25, 2015 9:47 AM.