Project SX-850 – Burn In
Well I could not really wait to get this back into my office so I can give it a thorough test and listen. I fully intend to sell this one
Project SX-850 Cabinet and Face Polish
All of the electrolytic capacitors and problematic transistors have been replaced, the pots and switches have been de-oxed and lubed and the bias and offset are all dialed in. It
Project SX-850 LED Lighting
In this part of the project, I replaced all of the device indicator and back lighting lights with LEDs. I chose the “warm white” lights from the list of available
Project SX-850 Power Amp Recap and Mod
Before starting the upgrades on the power amp I first set the bias and offset and then did a quick sound check to ensure that everything was working normally and
Project SX-850 Flat Amp Deoxit and Recap
So my day job has kept me busy and away from this for a few days, but I did manage to remove what they call the flat amp and the
Project SX-850 Main Filter Caps
Here you can see I had already started the replacement of the main filter capacitors. The original were Nippon Chemi-Con 50v 15000uf units that were wire wrapped with soldered drain
Project SX-850 – Recap and Deoxit The Tone Board
The picture above shows the untouched tone board (AWG-039) after removing it from the metal shields for easier access. Before replacing the capacitors I used Deoxit D5 to clean the
Continue readingProject SX-850 – Recap and Deoxit The Tone Board
Project SX-850 – Added Film Caps to Protection Board
Just as a quick update, I finally received the .22uf film capacitors so I was able to finish the work on the protection board. The film caps (the pink rectangles)
Continue readingProject SX-850 – Added Film Caps to Protection Board
Project SX-850 – The Recap Begins
So I finally ordered and received the parts to start the restoration of the Pioneer SX-850. The picture above shows the unmodified power supply board (AWR-101) with its 43 year