You have gone this far, so I say that it is worth investigating. At some point you will either succeed or take a hammer to it.
Thanks guys.
@Globulator has suggested a smaller cap, @NareshBrd says try a larger one. When tested there appears to be nothing wrong with the original...
The motor isn't designed to be disassembled so a drop of oil on the spindle is the full extent of a possible service.
If I can access the IC easily enough I'll check it
@Globulator has suggested a smaller cap, @NareshBrd says try a larger one. When tested there appears to be nothing wrong with the original...
The motor isn't designed to be disassembled so a drop of oil on the spindle is the full extent of a possible service.
If I can access the IC easily enough I'll check it
After you write that the cap is only 1000uF, I no longer consider it an issue!
I'd disconnect the motor and see if I could blow the fuse by switching it on and off, perhaps with a small 12V festoon bulb on there. Then I'd set a bench PSU with a current limit, andtry to drive the motor on and off, and see the peak current draw.
I'd also look for wiring faults and component failures, if the first two tests pass.
Grease or oil on brushes can start a fire, and a lubricant film will block current flow too - keep those brushes clean and dry
Mark, While I agree about not using lubricants on motors with brushes, I am thinking that this TT motor is in fact brushless. At least that has been my experience with them in the past, but there is always an exception I suppose.
You can disconnect the transformer secondary. Either by removing the transformer or cutting the traces. Instead of the the transformer secondary, connect a bench power supply. I mean in front of the rectifier, so the rectifier is also in the path. Limit the current to 500-800 mA and see what happens.
My guess is that either IC1 decelops a short between pin 1 and 3 (unlikely, ICs do not fail easily but then again this is antique). Or in the motor housing some mechanical failure is creating a short.
Anyway with the bench power supply you can power the complete circuit and see what happens with the current.
My guess is that either IC1 decelops a short between pin 1 and 3 (unlikely, ICs do not fail easily but then again this is antique). Or in the motor housing some mechanical failure is creating a short.
Anyway with the bench power supply you can power the complete circuit and see what happens with the current.