Well, this board has been getting daily play in the new gameroom and a few things have been done to it.
First, the decal just under the board was/is damaged and was half peeled off from the previous owner. I removed the decal completely and used a combination of adhesive remover and brake clean to remove the residue. Brake clean is much more effective at removing adhesive than the adhesive remover, but I wouldn't recommend using brake clean on porous materials (like wood). Once the back of the decal and the cabinet were clean, I sprayed some new adhesive to the back of the decal and reinstalled it. Over the past week or so, only a couple areas have come up (around the most damaged area of the decal). It looks much better than it did.
I don't know why I thought this had an Arachnid matrix in it before, but it is definitely a Medalist. Anyway, many segments of the target are cracked, chipped, and broken which causes "stuck segments" every now and again during play. I've been on the lookout for a complete target head. I snagged an Arachnid target head off eBay recently, but come to find out that the mounting holes aren't even close to lining up with the studs on the machine. So now I'll be on the lookout for Medalist parts only (which seem to be about as rare as hen's teeth). I've called Medalist a few times and left messages, but I never get any return phone calls.
While browsing the operator menu, in "Diagnostics" I found a "sensor" option. Went to it and it said "Auto player change: OFF". Well that sounded great, I've been getting tired of pushing the "Player Change" button after each round. But there was no way to change "off" to "on" with the buttons. Did a little reading and found out that the machine has a motion detector. Located the detector and saw that an indicator LED would light when I moved near the sensor. The "sensor" menu is only supposed to show when the sensor is activated, but "off" wouldn't change to "on" when the indicator LED was lit. Luckily, the manual stated which header the sensor should be plugged into on the PCB, and it was currently plugged into the wrong header.
It was plugged into the first or second header (J12 or J13) on the bottom of the board. It needed to be plugged into the fifth from the right header.
With the sensor plugged into the right header, the "sensor" test in the menu worked. However, during play, the sensor would only work about 40% of the time, and the sensitivity was cranked to max. After a lot of tinkering, I found the sensor to be much more responsive when facing forward vs. straight up (how it was originally installed). So I got some angle brackets and mounted the sensor to face forward.
Now the auto player change function works great and the sensitivity is only set at about 25%.
Another thing left to do to the board is splitting the video signal. The clear cased TV sitting next to the board in the first pic will be a secondary display for people watching so they don't have to crowd the player when they're throwing. I'm waiting for a converter to come from China to convert the VGA signal to composite. I tried a cheap VGA splitter and cheap VGA to composite cable, but the TV wasn't syncing.
If anyone has ANY parts to one of these and would be willing to sell, let me know. I'm looking for newer ROMs (mine are Version 2.0), target head, decal sets, and maybe other stuff.