Magnavox Micro-Matic (Collaro) record changer

Hi All,

So I just compleated a restoration of a 1972 Maggie Micro-Matic turntable that is part of a Magnavox Astro-Sonic consol. This is the all chrome one with ceramic E-V cartridge. Rewired the tonearm, cleaned and relubed all the moving parts... However, there is one issue that I cannot seem to figure out so I'm looking for somee advice from the experts here in phonoland.

When I put a stack of records on, they play through just fine. However, when I turn the stack over and restart the player, there is a speed flutter present that will not go away. If I let the unit sit for a few hours and try again, the flutter is gone like nothing ever happened. If I play one record and than stop the unit and turn the record over and restart the unit, the flutter is there.

I have cleaned the idler wheel, inner platter rim, and also the motor shaft but I cannot seem to rectify the problem? Any advice would be appriciated. Note that this is NOT a BSR changer, it is made by Callaro of England and has no ties to the Bound to Scratch Records Company and is a tad different in design.

Thanks,

Joey1127

I just fixed this on another unit.

- Check the idler height, to see if the idler is somehow right on the edge of the speed step, so it is dragging on the next step.

- Check the lubrication of the jockey arm parts that hold the idler wheel. It might be reducing spring pressure on the wheel.

- Is the idler wheel hardened?

- Is one record slipping on another? Dish warp is the usual cause of this.

- Are the rubber motor mounts failing? This could cause the idler height problem top appear after the mounts warm up from the motor heat.

Record-changer wrote:I just fixed this on another unit.

- Check the idler height, to see if the idler is somehow right on the edge of the speed step, so it is dragging on the next step.

- Check the lubrication of the jockey arm parts that hold the idler wheel. It might be reducing spring pressure on the wheel.

- Is the idler wheel hardened?

- Is one record slipping on another? Dish warp is the usual cause of this.

- Are the rubber motor mounts failing? This could cause the idler height problem top appear after the mounts warm up from the motor heat.

Thanks for the response. I am going to check all of this out right now and will advise what I find. I never thought about the motor mounts.

Joey1127

OK,

I checked everything out and I have come to the conclusion that the motor is bad... The idler is working correctly and there is no height issue at all. However, when I play just one record both sides, it's fine. If I stack records or play more than one, that's when the problem starts and it only shows up once the unit is turned off and than restarted.

The motor is getting DOG HOT to the touch when I check it. Is there any way to open up the motor and clean it internaly???

Joey

***UPDATE***

Hi All,

OK, turns out that it WAS the motor. I pulled it and took it apart only to find it was full of CRUD and lots of oxidization. I cleaned it and relubed it and now it runs 100% as it should! The unit sounds GREAT!

Thanks,

Joey1127