Yamaha DX7 repair - worth it?

[dintymoore]

Myself for $3 if the battery fixed it you could probably sell it for $100... should take about an hour... not a bad gig.

Supercreep I have a working and a parts Six-Trak, that was my first sequencing DAW in 1983. They still have a great Moog type bass. Great keyboard, you might be able to sell it for parts. Wine Country still services (and buys) Sequentials. http://www.winecountrysequential.com/

It's funny, when you write MIDI Sys Ex code, one of the first things is the manufacturer's ID, it's a number assigned to each company, and Sequential Circuits number is "01". That's because it's owner David Smith pretty much wrote the MIDI code.

In 1984 I had a meeting with John Bowen and we drove everyone so nuts that they all left and we talked for hours about MIDI. John programmed the sounds in the 6-Trak and later did the Korg Wavestation. He was the first Moog clinician in 1973! Another example of how when you meet the real guys at the top that they are regular nice people.

[madfresh]

I've been away on vacation so haven't been able to fix this thing but I'm back no so gonna buy an AA battery holder, some batteries and sweet talk my land lord into helping me out with the soldering out. I'll let you guys know how it went.

Btw, this is my motivation for getting the synth fixed:

Harajyuku Sisters - "DX7 is FUNK"

[arcaxis]

Helpful hint if you get the DX-7 to power up and things don't seem to work right......

Today I had to replace the RAM battery in a DX-11. After the install I had no sounds when I played the keyboard making me think I had further problems with the board. Turns out the "Local" control parameter had defaulted to "Off" with a dead battery. Switching it to "On" restored the keyboard function.

[madfresh]

Thanks for that, arcaxis. Actually, I had my landlord remove the old battery and replace it with battery holder and two AAs. Unfortunately, the synth would still not turn on. Does anyone have any ideas on what else could be the problem?

[Gothboy]

I also need the same battery. I just aquired a DX7 with seemingly the same issue. It turns on but the patches make only slight blips if at all. The voltage on the battery reads 2.3 so I'm hoping to get a battery and get it going. The G battery on that diagram looks to be the one.

[mayersdesign]

Just a brief note from the future (well 2013) to say that...with regards to the ORIGINAL issue the weird bending during note attack - I just solved it on my DX7! I'm afraid I was hitting buttons in desperation when I cracked it, but it was definitely related to "portamento" - specifically I set the "porta time" (function + 7) to 0 (it was on 99) and the problem disappeared. I then fiddled with portamento itself...now I am to scared to touch it again!

So there you are...no need for a reset and I am good to go!

Good luck all!

Tom