As I mentioned in my previous article about the Yamaha CS1x, I managed to acquire a used Free Yamaha DX-7 over the weekend in prestine condition. The main reason besides being a frequent customer of this particular used music store in Nagano, the Yamaha DX-7 was not functioning properly. The sales clerk couldn’t fix it so he thought it best to just get rid of it. What I particularly liked about it was the fact that it was in near mint condition. When I got home I opened it up and there wasn’t one scratch or dust bunny inside. It was virtually brand new and perhaps a bit strange to be in such great shape. Cosmetically on the outside it was in spit shined mint condition as well.
Currently I already have a working Yamaha DX-7 with the Grey Matter expansion board that I installed in it. The only problem is that cosmetically the DX-7 is really in bad shape being all dinged up and having some rust in some places. I thought at the very least I could transfer the insides of the working DX-7 to one that looked brand new I got over the weekend. I could then strip it for parts and use them when needed or simply sell the rest. The Yamaha DX-7 also came with the original case as shown in the photo which was cool.
So what it wrong with the new Yamaha DX-7? I am not sure yet. The problem is that when you turn it on, it becomes stuck with the “YAMAHA DX7 SYNTHESIZER” message in the display. Sometimes it says to insert the cartridge or that the cartridge protect is on. There is also no sound and the buttons do not respond at all. The battery in the DX-7 was recently replaced and I replaced it again just to make sure it was new. Later this week when I start transferring over the boards from my other DX-7 I plan to try and isolate the problem. At this point I am not sure what it is, but I’m sure I’ll eventually find the problem. If not, I hope to put together a near mint working Yamaha DX-7 and will likely part out the other one. We’ll see. I’ll update this article as I progress and will certainly post the problem and solution once identified. Stay tuned!