eirianwhopkins wrote: ↑

Tue Jul 07, 2020 4:00 pm

Recently bought a Roland U20 in need of some TLC. Fixed keys...

When you fixed the keys , could it be that you disconnected accidentally the ribbon extension on the left side?
This connection is not meant to be disconnected, it is held by conductive adhesive tape that is not reusable.

Hi, it looks like memory corruption.
if restoring to factory defaults does not help, check the power supply.
Also check for battery leakage as this could affect backup memory operation.
I have seen ram chips go bad on the mkI, causing similar issues.

Hi , what you are experiencing is a common issue for the D50. The problem is that the rubber contact strips that are under the keys , are either dirty, worn, torn or misaligned. https://www.synth-parts.com/media/image/f1/88/30/Contactrubber_Kawai_RH88Ag4Cf1ikGwcP7U.webp In most cases they are just d...

Sorry there is no way, you have to either use a factory card or send the factory sysex via midi

Hi and welcome to the forum.
The noise that you are describing could be a common issue for the M1.
A capacitor in the power supply and a resistor on the DAC board could be the culprit.
check this thread:
http://forum.vintagesynth.com/viewtopic.php?t=53799

Hi and welcome to the forum. The RFX32 card was optional and it was introduced with the ultra series. It needs at least EOS 4.5 to operate. For more info here is the cards manual: http://www.deepsonic.ch/deep/docs_manuals/e-mu_eos_6864_rfxcardinstall-c.pdf The differences are in the eos versions , t...

Did you try a factory reset ? Hold Int, Combi and Prog while turning it on.
Warning! all patches / settings will be lost .

Wow, thanks! Was your thinkning that the switch mode would not need hole to be drilled? Unfortunately , both solutions will need some hole drilling, it is just that the SMPS is easier to find than the custom transformer. Assuming that you live in the US , you can have a look for the custom transfor...

Hi , I have never seen a drumtraks in real life, but the transformer you are looking for has dual center-tapped secondary windings that output 2 x 18 VAC and 2 x 9 VAC, and it should be rated at 75 watts or more. Chances for finding the same transformer are slim , you can order a custom one with thi...

Hi and welcome to the forum. The TS-12 is a very interesting synth that combines a few sound synthesis techniques like transwave, subtractive, sample playback etc and it was one of the last products that ensoniq produced. Unfortunately it does not fetch a lot, I would say $250 -600 depending on the ...

Good job! I am glad you got it working. I was a HUGE SH2000 hater, until I got one. Personally I find the aftertouch to be so expressive, maybe the best aftertouch i have ever used. There is a modification that you can do, so that all sounds can play simultaneously, although it has some drawbacks. E...

The only synths that i have seen using the 555 timer ic is the sh2000 and some DIY PAIA kits. I bet that any 555 will do, there is no risk of doing any damage. Always use IC sockets! 10V on pin 8 is no good, let me check the schematics and i ll get back to you. Edit : 10V on pin 8 makes no sense, VC...

Close but no cigar :) I guess that you have proper clean contacts both on the VCO board and the mainboard, then you should check : - On VCO board test 555 pin 8 for 15V - On VCO board test 555 pin 3 for Pulse wave. No pulse ->Replace IC . Also IC 101 might be in fault, buy a few 1458 or replace with...

Hey these are some good news man
Dont forget to clean the switch, if it is not doing proper contact it can blow the fuse.
Let us know how it goes when you replace the fuse !

I got my beat up sh2000 in pieces with missing parts , overall condition 2 out of 10. Unfortunately the original transformer was missing , so I dont know what the correct voltages should be. 2x 30Volt is on the high side, it will put more stress on the regulators but it should work, usually vintage ...