My turntable has been in storage for decades, but it worked perfectly when I stored it. Unfortunately it spent time in an attic that gets hot, so I'm thinking something might have been affected by the heat. I followed a tip I found online for replacing the poorly-designed original power switch with one from a computer. The two power leads went to the top terminals, the brown transformer lead to the bottom left, and the blue transformer lead to the bottom right. The new switch worked perfectly, but when I start her up, the platter spins like a washer on spin cycle. Anyone have any ideas how I might troubleshoot this? I don't even know where to start.
Did it work right before you replaced the switch?
There's service notes at VinylEngine, membership is free and non-annoying. However it is purely technical, and you need to be real sharp on a voltmeter and also diagnosis.
There's service notes at VinylEngine, membership is free and non-annoying. However it is purely technical, and you need to be real sharp on a voltmeter and also diagnosis.
It hasn't been used in many years, but it did function perfectly before the switch failed. I wish I had just held the old switch down and tested the platter speed before I swapped out the switch.
You want this manual - 00B/15B service manual.
The other 'service manual' is in fact the operators manual.
The switch you describe is the mains power switch - obviously working or nothing would happen.
Check any electrolytic capacitors - they can go bad with age.
I can only see 2: main filter cap and one other.
If C731 has shorted it would cause full speed.
After that you are in to more involved testing, beyond me to advise.
The other 'service manual' is in fact the operators manual.
The switch you describe is the mains power switch - obviously working or nothing would happen.
Check any electrolytic capacitors - they can go bad with age.
I can only see 2: main filter cap and one other.
If C731 has shorted it would cause full speed.
After that you are in to more involved testing, beyond me to advise.
Is it possible you might have blobbed some solder onto the PCB by accident while replacing the switch?
Have a good look 🙂
If it gets more technical then a lot depends on your skills at finding your way around a circuit diagram and also what test equipment you have. There are some quick and dirty tests that can be done to try and pin the area of a fault down.
If it gets more technical then a lot depends on your skills at finding your way around a circuit diagram and also what test equipment you have. There are some quick and dirty tests that can be done to try and pin the area of a fault down.
I hit reply then when I didn't intend to...
was going to ask if any of the speed controls have any effect at all.
Make sure a wire hasn't fallen off from the pulse generator from the motor (tacho Philips call it).
was going to ask if any of the speed controls have any effect at all.
Make sure a wire hasn't fallen off from the pulse generator from the motor (tacho Philips call it).
I can figure out a diagram, only have a basic voltmeter, and am a novice in electronics repair. I've fixed a cassette player and a CD carousel, but honestly don't know what I'm doing with circuitry. So, if it's a simple task, I'm all over it, but if it's expert-level stuff, then the old gal's sadly headed for the rubbish bin.
Speed controls have zero effect, once the platter gets spinning. I'll look into your suggestions when I get the chance. Thanks for the follow-up!
Speed controls have zero effect, once the platter gets spinning. I'll look into your suggestions when I get the chance. Thanks for the follow-up!
To the garbage can ? 😡
Give the poor turntable another chance before doing that heresy.
A technician will solve it !
😉
Give the poor turntable another chance before doing that heresy.
A technician will solve it !
😉
Connect 220 instead of 110 Volts? If that were the case, I take back what I said, throw it away .......🙄