I found a vintage Sony reel to reel Model TC-252D in mint condition, Still sealed along with original goodies like empty reels, replacement RCA plugs etc. Being mint doesn't mean it works. It plays too fast in both speeds. This is the universal voltage model with the voltage selector and 50/60hz selector. I got it set to 117 volts 60hz and it plays too fast. I tried setting to 110 and even setting it to 50 hz in case the switch was marked wrong. Made no difference. I sprayed the speed selector switch and play/RWD/FF switch with contact cleaner but it did not help. I've read that it could have a 50hz pulley installed but I don't see any markings that say 50 or 60(another 252D I have says 60 on the pulley but it's a single voltage model). I took some pics of the pulley and idler wheels. Any ideas on the speed issue. The Run capacitor checks out OK as I did meter it. What is causing it to run fast. It's not the chipmunks fast but it's enough.