Speed selector not moving - UK Vintage Radio Repair and Restoration Discussion Forum

Imelda Mary · 29th Apr 2016, 2:26 pm

Hi, I have a Dynatron Mazurka with a Garrard turntable, recently recovered from the attic.
The speed selector won't move, it's stuck at 45. The other speeds are 16, 33 and 78, the selector is on the right. What can I do? Imelda.

AC/HL · 29th Apr 2016, 2:36 pm

Hi Imelda, and welcome.
This is one of the most common problems with long dormant record changer mechanisms. If you type "grease" in the search box above you will find many related threads. Basically, the mechanism needs dismantling, old hardened grease cleaning off, and replacing (but only where you find it, strictly nowhere else) Don't try to force it, it will cause more problems.

peter_sol · 29th Apr 2016, 2:42 pm

Is it an AT6 deck?

Imelda Mary · 29th Apr 2016, 2:44 pm

Thanks it's a ' SP 25 mK 11.

Imelda Mary · 29th Apr 2016, 3:21 pm

I've taken it apart and no grease is there, it appears to be jammed by a piece of metal protruding as if through a keyhole. I have a picture but not sure how to post it?

Station X · 29th Apr 2016, 3:24 pm

Quote:

Originally Posted by Imelda Mary

I have a picture but not sure how to post it?

See this sticky thread:-

https://www.vintage-radio.net/forum/...ad.php?t=77650

peter_sol · 29th Apr 2016, 3:36 pm

I feel the problem is not where you think it is have you taken the turntable off?

Imelda Mary · 29th Apr 2016, 3:38 pm

This is the problem.

peter_sol · 29th Apr 2016, 4:03 pm

That is its normal mechanism as I said the problem is not where you think it is. Best to remove the turntable, then you will be able to follow the levers.
Examine everything and check everything is free to move .
The idler wheel sits on a lever which itself goes up and down on a shaft when the speed lever is moved .
I expect it is stuck on its shaft

Imelda Mary · 29th Apr 2016, 4:06 pm

Thanks, where do you think the problem is ? I've taken off the turntable and can't see anything else wrong?

peter_sol · 29th Apr 2016, 4:23 pm

https://www.vintage-radio.net/forum/...d.php?t=105504

See post 15
Check for freeness as shown. Good luck.

Edward Huggins · 29th Apr 2016, 4:37 pm

With the turntable off, and the control lever at OFF/STOP, your should easily be able to change the speed slider control and see the rubber idler wheel moving up and down very close to the stepped pulley that comes up from the motor. Then switch to ON and the rubber idler wheel should touch that spindle. If it's doing all that, its OK. Make sure the inner turntable rim is not sticky, switch to OFF and replace. These a very reliable units. Edward

Imelda Mary · 29th Apr 2016, 4:52 pm

Thanks for the help it was stuck with grease like you said .

29th Apr 2016, 2:26 pm	#1
Imelda Mary Retired Dormant Member Join Date: Apr 2016 Location: Kilkenny, Ireland Posts: 9	Speed selector not moving Hi, I have a Dynatron Mazurka with a Garrard turntable, recently recovered from the attic. The speed selector won't move, it's stuck at 45. The other speeds are 16, 33 and 78, the selector is on the right. What can I do? Imelda.

29th Apr 2016, 2:36 pm	#2
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,643	Re: Speed selector not moving Hi Imelda, and welcome. This is one of the most common problems with long dormant record changer mechanisms. If you type "grease" in the search box above you will find many related threads. Basically, the mechanism needs dismantling, old hardened grease cleaning off, and replacing (but only where you find it, strictly nowhere else) Don't try to force it, it will cause more problems.

29th Apr 2016, 2:42 pm	#3
peter_sol Octode Join Date: Aug 2003 Location: Welwyn Garden City, Herts. UK. Posts: 1,906	Re: Speed selector not moving Is it an AT6 deck?

29th Apr 2016, 2:44 pm	#4
Imelda Mary Retired Dormant Member Join Date: Apr 2016 Location: Kilkenny, Ireland Posts: 9	Re: Speed selector not moving Thanks it's a ' SP 25 mK 11.

29th Apr 2016, 3:21 pm	#5
Imelda Mary Retired Dormant Member Join Date: Apr 2016 Location: Kilkenny, Ireland Posts: 9	Re: Speed selector not moving I've taken it apart and no grease is there, it appears to be jammed by a piece of metal protruding as if through a keyhole. I have a picture but not sure how to post it?

29th Apr 2016, 3:36 pm	#7
peter_sol Octode Join Date: Aug 2003 Location: Welwyn Garden City, Herts. UK. Posts: 1,906	Re: Speed selector not moving I feel the problem is not where you think it is have you taken the turntable off?

29th Apr 2016, 3:38 pm	#8
Imelda Mary Retired Dormant Member Join Date: Apr 2016 Location: Kilkenny, Ireland Posts: 9	Re: Speed selector not moving This is the problem. Attached Thumbnails

29th Apr 2016, 4:03 pm	#9
peter_sol Octode Join Date: Aug 2003 Location: Welwyn Garden City, Herts. UK. Posts: 1,906	Re: Speed selector not moving That is its normal mechanism as I said the problem is not where you think it is. Best to remove the turntable, then you will be able to follow the levers. Examine everything and check everything is free to move . The idler wheel sits on a lever which itself goes up and down on a shaft when the speed lever is moved . I expect it is stuck on its shaft Last edited by peter_sol; 29th Apr 2016 at 4:08 pm.

29th Apr 2016, 4:06 pm	#10
Imelda Mary Retired Dormant Member Join Date: Apr 2016 Location: Kilkenny, Ireland Posts: 9	Re: Speed selector not moving Thanks, where do you think the problem is ? I've taken off the turntable and can't see anything else wrong?

29th Apr 2016, 4:23 pm	#11
peter_sol Octode Join Date: Aug 2003 Location: Welwyn Garden City, Herts. UK. Posts: 1,906	Re: Speed selector not moving https://www.vintage-radio.net/forum/...d.php?t=105504 See post 15 Check for freeness as shown. Good luck.

29th Apr 2016, 4:37 pm	#12
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,340	Re: Speed selector not moving With the turntable off, and the control lever at OFF/STOP, your should easily be able to change the speed slider control and see the rubber idler wheel moving up and down very close to the stepped pulley that comes up from the motor. Then switch to ON and the rubber idler wheel should touch that spindle. If it's doing all that, its OK. Make sure the inner turntable rim is not sticky, switch to OFF and replace. These a very reliable units. Edward

29th Apr 2016, 4:52 pm	#13
Imelda Mary Retired Dormant Member Join Date: Apr 2016 Location: Kilkenny, Ireland Posts: 9	Re: Speed selector not moving Thanks for the help it was stuck with grease like you said .