u:laborI just released a demo of a #Moog #Rogue #synthesizer that I modded while giving it a full overhaul. Now the LFO speed can be switched with some overlap. Schematic included. Have fun.
YouTube
Paul LalondeTrying to find where a deceased synth software enthusiast checked for hashed-against-your-serial-number keys before allowing use of the revised software.
So of course I now have an interactive m68k disassembler/labeler/exploration tool.
If only I could figure out the load address. It isn't zero.
Maintenance manual hardware diagrams at least give me ROM and device address ranges.
Now I need automatic basic block extraction.
#synthrepair #reverseengineering
So of course I now have an interactive m68k disassembler/labeler/exploration tool.
If only I could figure out the load address. It isn't zero.
Maintenance manual hardware diagrams at least give me ROM and device address ranges.
Now I need automatic basic block extraction.
#synthrepair #reverseengineering
kaputnikGo
Full re-cap of the power regulator board for the CS-10 after finding more leaky caps.
I just fixed another #Roland #SH101. A lot of damage and since the oscillator (famous #CEM3340) was dead and needed replacement I ran into hi notes tuning issues once more. This time I addressed them by making a custom circuit with a dedicated hi end trimmer.
If you have the same issue, please drop me a note to see if there is demand for a small series production.
Read more about repairing various issues of this wonderful #synthesizer in my blog.
Solina String Ensemble MkII issue tracking. A lot of work on top of the usual recapping because of the Bass Circuit board being populated with a blend of MkII and MkIII resistor values. A total mess and I guess the bass section stopped working in 1993 when the net voltage was raised from 220 to 230V. The #Solina #Strings have an unregulated PSU so the main point is to get voltages to spec or certain transistors will fail.
subethaLast year I needed to repair the backlight of the display of my Roland D-550. I've chosen to replace it with an OLED.
Now I've created a short video with footage and pictures taken during my repair. More information to be found in the description of the video on Peertube.
Upgrading Roland D-550 with OLED display
@flpvsk This sounds great! Thank you for spreading this initiative. I've started to progressively increase my skills in soldering and repairing my synths/fx gear.
Maybe I'm going to come along at a later date. Currently I don't have enough time to dive into a new maintenance project.
Well, that escalated quickly. I discovered MakerTube today, liked it so much that I created an account and uploaded my first video in a rush. 😄
The video is already older and shows how I replaced an old LCD with a new OLED in my ESI-32 sampler:
https://makertube.net/w/eXkuEXxqjX4pZ5NCpDHzck
I'm planning to create more videos with and about my synths, but don't expect new content in this year. ⏳
Ulf Henrich 
