I'm not really an expert with these turntables (that's Martins title) but I'd agree with you that it sounds like the motor is faulty.

Any way, I've got your address and I'll post the motor I have to you next week. Not sure when you'll get it with it being Christmas and all that. I have studied the photo of yours and compared it to the one I have and I'm sure it will fit in the housing but you may need to swap the pullies over or do a bit of jiggling around to get it to line up with the one on the shaft. Hopefully though it will slot straight in.

Chris.

Despite my best efforts, the old motor has seized up almost 100%. I can measure it getting say 9V, but it just wont budge. If I help it rotate, it can go on for a sec. or two.

Chris has been very generous, and I'm looking forward to trying the motor he is sending me. Hopefully, I can find spare parts here in Sweden that he might have som use for!

Update will follow when I have installed Chris' motor. Fingers crossed...

If this motor was used together with the board that you send to me
for repair, it's quite understandable. The H-bridge was shorted, causing
full DC to reach the motor at all times, toasting a couple of transistors
as it went along.

Martin

Ouch! 😉 I'm keeping my fingers crossed, hoping you can salvage the board. 🤒

/Folke

PS. Is it possible that this fault put the motor in "reverse" before the components failed?

Hard to say for sure but certainly not impossible. The board will be fine again, it has been repaired, soak tested and only the trimmers need replacing now.

Martin

Martin, you have a PM

Martin Olsen, if PM doesn't work, please e-mail me

For Chris.

PM seems broken, so I'll post here. Motor's arrived, twirls nicely using a 9 Volt battery, and looks like a drop-in replacement. Update when installed, some more work to be done first. Many thanks!

EDIT/ But now PM seems to work! 🙂