Restoring a '70s Pioneer SX-636 RECEIVER!

A couple of months ago I drove to Eastern Washington and picked up some stereo equipment. One of those pieces of equipment was this Pioneer SX 636 receiver. It worked fine other than some crackly controls but was in need of a good cleaning and tune up.
I replace the power cord, upgraded the lighting to LEDs and replaced most of the transistors and capacitors in it to ensure a few more decades of run time. I also disassembled the push button switches and rotary potentiometer controls to give them a good cleaning.


00:00 Intro and Background story
00:53 Testing the Power supply
01:58 Replacing the Power Cord
04:11 Discharging the Main Filter Capacitors
05:09 Recapping the Power Supply
05:59 Rebuilding the Phono Amp
07:27 Cleaning the Back Panel Inputs/Outputs
08:10 Rebuilding the Main Amplifier
09:16 New Lamps and LEDs
12:05 Preamp + Disassembling and Cleaning Switches
16:31 Polishing & Installing Faceplate
17:11 Adjusting Bias & Offset
18:13 Final Testing & Farewell

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My name is Matt. I live in Washington State and create content around vintage stereos and other audio equipment. I approach the hobby from the standpoint of appreciating the aesthetic as well as having a system that is enjoyable to listen to my favorite music on. I'm not generally spending time worrying about having the right cables or how good the speakers sound beyond a certain point. So long as the music sounds good enough to dance to, I'm happy. If you have a receiver that you would like serviced, drop a comment and we could talk about service costs.

IG and Tik Tok are @TheDealyDeal

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