SP-14 cartridge with diamond stylus.Motivation for restoration.Lol no. These holes on the bottom allow adjustment of the gain of individual inputs, so the user doesn't have to adjust the volume when switching inputs.Turntable and side panels removed. No (well, few) integrated circuits here.In the bottom of the chassis is a little manila envelope with a schematic in it. This thing is made to be repaired.Thank goodness for PDF copies of the service manual.It had a few too many issues, so I bought a second unit and used the first for parts. In most of my projects, it's about at this point I realize I'm crazy.Stay classy, David Beatty.The underside. Everything is so neatly tied and packaged together — actually makes it quite difficult to repair since you want to leave that stuff alone as much as you can.Diagram of the amplifier board. I love that the two channels mirror each other bilaterally so it looks like a Rorschach blot.The amplifier board. A bad transistor resulted in a blown resistor and fried trace.Replacing all the transistors on the amplifier board, and blown and questionable resistors.Swapping idler wheels between the two turntables for noise reduction.
