First thing to get sorted on this cab is power. It was powering but it was running a Sun Model 2/3 PSU in tandem with the standard JAMMA PSU and things were a bit or a wiring mess.
I pulled both the Sun and original Sega PSUs and am planning on replacing them with the PSU out of the New Versus City parts cab. In doing this I noticed a bit of buggery with the original power wires and a toroidal 220v to 100v transformer doing the mains voltage conversion. Toroidal transformers are nice for some applications but I need to check its isolation. It also dosent really mount neatly so ill likely change it out for one of the isolation/voltage reduction transformers in the other cabs. I have checked all these and they are all isolated and appear to work.
I picked out the worst of the two New Vs City PSUs and proceeded to strip it down to clean and inspect it. While it looked pretty bad, it actually cleaned up nice. It had a layer of black shit found in a lot of cabs that have been in a smoking environment but once that was cleaned everything visually looked into order.
The Amp.and PSU comming out of the cab were not as happy a story. While the Sun PSU was functioning cleaning uncovered a few chipped and decaying resistors. They measure correctly but can't be long for this world. Ill likely replace these, wire brush and paint the case and then sell the Sun PSU to cover new Control panels or something.
Likewise the Sega amp looked pretty bad. The back of the board was pretty corroded with a few of the resistors basically falling off at the slightest touch. Again they all measured correctly even with their legs totally corroded away. These were an easy fix what worried me more was the corrosion to the traces on the back of the board. I checked them for continuity and they all looked ok. One of the resistor pads was half eaten away with the leg corrosion so I decided to brush the corrosion out, fix the pad and reapply a UV setting solder mask. Looks ugly but should fix the issue.
With this done it appears to be working (it was actually working in its original condition). While there are a number of other resistors beginning to corrode, without a circuit diagram I am not sure if I can be stuffed working out all their values. I actually dont need this Amp so it was really just an opportunity to practice my fixing corroded pcb skills. While a little ugly I was pretty happy with the results.
