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It wasn't that work I just solderd some pin headers on the joints of the ROM and put the thing into the EPROMMER to read it. If I understand the MIDI SYSEX format of the DX7II right, you can

I'm using this thread because I don't see much about the DX7S here or anywhere. I just revived one that had a blown power supply. I tried to fix it, but the transformer was bad and other issues too. I

Can anyone recommend a good tech that can look over a Yamaha DX-1 on the West Coast? Thanks, Greg

Hi guys, Just following up a week later as I was away after doing the CR2032 coin battery holder installation. Thanks for your patience! I figured I'd get you guys some revised values before

how much and where are u ?

I still have a few prototype PCBs but you need some experience in soldering

Yes - I have done it with the DX100,and wrote the remote controller for Dx11/100 someplace on my commodore systems,which I don't use - just wanted to see how the remote system operated. LEE

Yes the remote panel button commands work, although I haven't used them myself. There was a recent video of a massive DX7 controller (not Jellinghaus or any commercial ones) that an individual made

Update: I found a thread DX7 Remote Panel Button Control with a 2016 post by Daniel Forro that answers my remote switch question. I can experiment with that for now.

For the DX7 IIs (v1.3 OS), do these MIDI sysex commands do the following: 1) Parameter Change ($1B = Switch Remote) will "press" the panel buttons? a) Do I set ON (d=127) and then OFF

Hello, Recently I bought an old TX81z, and have problems with saving patches at user bank I. When I press STORE button (and keep pressing) I select the available slot in user bank I, and when I

hI do you have more pcb for ram 6 i am interested best regards

Hi Ant, I bought 4 boards from you and finally started using them. :) I made one the "normal" way and have it in the case you designed. I also made one without a case but turned the dial and

(2) The voltage across the battery backed SRAM supply pins should be at 5v minus the voltage drop across the diode in the path from 5v to the battery (not sure about the exact value since the circuit

3.25V on U4 with unit OFF sounds suspiciously high. It should be more like 3.00V if the battery is 3.31V. The germanium diode should drop it about 0.2 to 0.3V. It sounds like maybe some capacitor

Hi guys - Sorry for the very delayed follow-up. Lots of stuff got in the way this past month. I think diode D4 is good, but I figured I'd see if you guys could confirm this. I finally opened the

Hi Guys, Sorry for the delay - I've been really busy doing real paid work! I did look into making a version of my RAM-1 cartridge with a connector to fit the DX7 II slot, effectively having an

I probably have the service notes that describe the changes. I'll have a look at home. I just upgraded from 1.1 to 1.3 and am in the process of changing the battery (dead!) and LCD ... the latter

Thanks to all for the helpful info and ideas. I was able to remove the connector and substitute a standard 0.1" (2.54mm) header. Power is back on. :-) I found that I have version 1.2 OS

Probably. Most LCD modules are compatible with a particular controller chip. I think I've seen replacement LCD panels for them on ebay, with different colour backlights.... There's a blue backlit