Project SX-650 Recap of Amp Boards
This is the first SX-650 I have worked on and also the first one I have worked on that has the integrated output transistors. This has the SanKen SP-40W packs
Project SX-650 Main Filter Caps
Replacement of the main filter capacitors was a must for this one as both of the old caps were “puffed” on the tops. Although they still seemed to test fine,
Project SX-650
So I met a nice couple who are in the appliance repair business when they came to evaluate an issue we were having with our oven (Urgent Care Appliance Repair).
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