My Fisher MC-723 turntable is spinning very slowly on 45 rpm. I'm unable to play any of my 45s. Not sure if I need to replace the belt.
I totally agree Andrew, of all the turntables we have repaired over the last 40 years I've never seen a belt cause one speed to not work, according to the manual this lists a replacement belt, I was thinking the same thing you were, this is an electronic issue, generally there is a resistor or capacitor that slows the motor down for 33 rpm, it runs at full speed on 45, I've also seen an actual variable voltage motor although that's not common,so the theory of it being an electronic issue seems strange as well. If it actually has a belt I'd look for something miss aligned, where it's not moving the retainer all the way over for 45 RPM. This is kind of a hard one to diagnose without seeing the unit
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