I have to replace a few components on the mainboard as well as a voltage regulator on the powersupply and some other bits & pieces.
So first up is checking in detail what I need. Some of the coding on diodes etc has been worn off, so I’m using a desktop microscope to see if I can find out what it is.
Most everything I found out, with the exception of one small type of diode. Thankfully, Paul was able to find out that it was likely a Philips BAT85 Schottky Signal Diode.
I found a bunch on Ebay and they are underway.
Next up is replacement switches for the switch panel board. The boards (minimum of 5) are being produced right now in China, for the hefty sum of 43 Euro’s (add 50 for shipping & 20 for taxes – still, it’s cheap) and should be here early next week. Thanks again to Paul for his amazing KiCad skills and sharp eye.
These are the new switches. I could replace them all, but I do want to re-use as much of the originals as I can.
Incidentally, I’m not throwing anything away. I collect all the broken parts & components – hardly anything ends up in the trash.
A bunch of other parts have been ordered:
– Fresh thermo paste for the power supply
– High end IC socket to replace the corroded one (although in the new setup it will remain unused)
– 56R resistors (which surprisingly I didn’t have at all)
– A 4cm loudspeaker – the original one was pretty much rotten away
– EDAC Male 38 pin connector and crimp pins for the MIDI in/out box I have to build.
I think, with that, I should have everything in to complete the refurbish. With exception of the EDAC cable for the Audio part. It had it’s own EDAC port and the whole audio system seemed to be completely separate from the rest of the system. There were no connections to the main board whatsoever.
I tested a piece of the outer casing and the paint I had mixed and it’s dead on perfect. So I can also start thinking about how to approach repainting much of the case.
To be continued next weekend…..