



Finally fully restored Sony TCS-310
I had to Frankenstein this together between 3 separate partially working units, but I finally was able to get one fully working! After a lot of trial and error figuring out which parts from which units were working properly, and fully soldering in and out each board, all of the functions are finally working as intended. The last bit was figuring out how to adjust the playback speed. I had a hard time finding any clear info regarding this, so I figured I would make a post for reference for anyone looking in the future (pictures for reference).
There are two adjustment points. One being a flat plastic screw on the plate covering the flywheel. The other being a small potentiometer [technically] accessable in the battery compartment bay. You do have to have the player apart partially to adjust the speed (unless you have the proper DC power plug in, which I don't) because the battery pack covers the adjustment pot.
Once the back panel is off you can rig up the battery contacts to the battery pack outside of the casing. The potentiometer there is the electrical speed adjustment. It's very small and delicate. I had to use the sharp end of a razor blade to adjust it because none of my flat heads were small or narrow enough to fit.
The plastic screw on the flywheel plate will adjust how much friction, or how "tight" the flywheel is. I had to go back and forth several times between the two before I hit the sweet spot in their adjustments to get the right speed.
I've had this thing apart and back together so many times, it's actually kind of crazy that it's all working now. It's a great looking sounding vintage player!