@barts , "Shops are not kind to ancient 'out to pasture' audio gear."
A couple of 'spring shop scrubs' ago, took down the Sony receiver & 5 cd player, and the SAE 2 band & channel parametric eq; the latter the only 'vintage' of the bunch. The SAE and the player are essentially sealed or opted to not hassle to do more than vac, clean the obvious, lube as req'd.all that moves or slides....
The receiver, with the case top and sides off had a eighth- to a quarter-inch of sawdust on anything 'top-up'.....but, Hey...SS, A/B...
Can't kill it with a stick...