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Member
Hello,
I have a Collaro 3RC531 radiogram from the 1950s. This unit uses, I believe an AC synchronous motor (in conjunction with an idler wheel) to drive the turntable. It was working well, until I lent the unit (foolishly) to a friend. Apparently, he spun the table in the opposite direction to normal, and the player was accidently switched on whilst the deck was still rotating. As you can image, there would have been a sudden jerk as the motor tried to reverse its direction.
Trouble is, now it doesn't work very well at all. The motor sort of, vibrates (like if you connect a DC motor to AC). sometimes, when i start it spinning with my hand, it will spin for a second or so, but not much longer. Occasionally it starts itself, but not at the correct speed (the turntable runs too slowly).
In an attempt to fix the problem, I have dissembled and cleaned the motor, checked the continuity of the two coils (200 ohms per coil, 2 coils in series @ 240VAC) and I also found that neither the rotor or the coils or the housing or anything is magnetized. (By the way, supply voltage was checked- ok)
I'm not at all familiar with this type of motor (or problem) and researching on the net didn't seem to yield any useful results. Therefore, any suggestions or comments would be hugely appreciated.
Thanks!
**broken link removed**
I have a Collaro 3RC531 radiogram from the 1950s. This unit uses, I believe an AC synchronous motor (in conjunction with an idler wheel) to drive the turntable. It was working well, until I lent the unit (foolishly) to a friend. Apparently, he spun the table in the opposite direction to normal, and the player was accidently switched on whilst the deck was still rotating. As you can image, there would have been a sudden jerk as the motor tried to reverse its direction.
Trouble is, now it doesn't work very well at all. The motor sort of, vibrates (like if you connect a DC motor to AC). sometimes, when i start it spinning with my hand, it will spin for a second or so, but not much longer. Occasionally it starts itself, but not at the correct speed (the turntable runs too slowly).
In an attempt to fix the problem, I have dissembled and cleaned the motor, checked the continuity of the two coils (200 ohms per coil, 2 coils in series @ 240VAC) and I also found that neither the rotor or the coils or the housing or anything is magnetized. (By the way, supply voltage was checked- ok)
I'm not at all familiar with this type of motor (or problem) and researching on the net didn't seem to yield any useful results. Therefore, any suggestions or comments would be hugely appreciated.
Thanks!
**broken link removed**
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