My banged up Yamaha DX7 needed a new display as it was a bit dim and I also wanted a backlight I did not want to pay €20+ for a new display kit. In this video I show how I did this. Perhaps this would have been easier to just buy a kit but I…
In this video I replace the old keybed felt which sits on top of the aftertouch sensing strip in my Yamaha DX7 and then calibrate the aftertouch. The keys hit this felt when they are pressed and then push on the aftertouch sensor strip. As it was worn out some of the keys hit directly…
In this video I replace the Yamaha DX7 power cable with a IEC C8 socket (If you are going to do this please be VERY careful as this is 110/220V and it can be very dangerous). It seems to be quite common in the DX7 that the cable, which is mounted directly in the chassis,…
This Access Virus Rack was continuously restarting when power was connected. This is apparently a common issue with the Access Virus and is due to a capacitor in the power supply going bad. In this video I replace said capacitor. I didn’t have to do any real troubleshooting here as there were various references to…
I bought this Roland TR-505 as “for parts/repair” as it didn’t start at all according to the seller. After a little investigation it became clear that it did work on batteries and it was just the power connector on the main board that had issues. One of the pads the connector was soldered to had…
This Roland JP-4 had one voice board where the filter behaved differently. I had gone through the entire calibration procedure in the service manual but I could not get the VCF Envelope Balance correct. The other three voice boards had no issues. When calibrating the board in question I just could not get it into…
Repairing a broken key of a Yamaha DX11. The key did not spring back up when pushed. This was due to the plastic in the key having snapped and the steel spring had detached. It is quite common that the plastic in these old keyboards becomes brittle over time. If the issue in the video…
This Yamaha DX7 did not power up. I thought that it was due to one or more fuses being blown but they had not. After a while I discovered that the power cable was broken internally close to the chassis. This was probably due to the cable being sharply bent there many times over the…
In this video I will be replacing the original NiCad battery in a Roland Jupiter-4 (JP-4). This kind of battery is prone to leaking which can cause problems. In the JP-4 this is not an very big issue (at least compared to e.g. Korg Polysix where the leaking battery will cause havoc and damage traces…
This Waldorf Pulse 2 had been dropped and this had cracked the dispay. I had hard time finding the original screen (Powertip PE12864WRF-004HC1Q) as it seems to have been discontinued by the OEM. I found a post on Elektronauts where a user, “infekted”, had replaced the screen with another one successfully. Unfortunately it was not…
