Technics SL-23 restore and revamp, Part 2.

With the turntable apart lets start with the restoration part, first up replace all electrolytic capacitors. The easiest one to replace if the 1000 uF 16V one found on the power supply. I had to pay ten times more for an axial replacement vs. a radial but I wanted to keep it as stock looking as possible.

 The replacement capacitor I got is rated 25V but still a bit smaller than the original.

The rest of the electrolytes are on the servo PCB. Mine got six and it can be hard to read the values. I found this page on the Internet identifying five of them and also mentioning the six one.

These are the ones you need if you got all six:

• One: 0.47uF 50V
• Two: 3.3 uF 25V
• One: 1 uF 50V
• Two: 10 uF 16V

This is what I got. Nichicon UFG MUSE and Elna RFS SILMIC II is a bit overkill for this application but it was what I had in the bin...

Replacing the capacitors was quite straight forward except for the sixth one. It was quite tricky to identify what pads it was connected to due too excessive solder on the solder side. Note the green insulation on the positive leg and where it was routed.

I ended up using a piece of shrink tubing to mimic the green insulation and routed it the same.

And here is the final result for another 50 years to come, I hope...

But it isn't just electrolytic capacitors that age, another problem is rubber. This turntable doesn't have a floating chassis, it has springy feet instead. These feet age and might be really hard to replace if they get too dried out and crack. The feet on my table was I pretty good shape but I decided to rejuvenate them anyway.

Start by removing the old felt and the sticky stuff used to stick the felt to the feet. Be gentle and take your time. You don't want to accidentally damage the rubber. The glue left on the rubber feet is best removed with CRC 5-56. Use a pair of tweezers and cotton swabs to get it all off.

This is what they should look like when your done:

Rubber is best rejuvenated in a mixture of 50% glycerol and 50% denatured alcohol. Mix the two components in a jar and let the rubber-part stay in the mixture for 12 to 24 hours. Remove any excessive fluid and they will be like new again.