Question about RCA port Turntable with CD&Digital Radio (841.660) Shelf System

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Turntable rpm Problem: turntable revolves at slower speed than 33 1/3 rpm. Drive wheel, inside turntable has changed in size over years. Needs new drive "wheel" or rubber washer item to attain proper speed

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  • Anonymous Mar 30, 2014

    Turntable turns super slow sounds terrible
    Doesn't matter what speed you play
    Is there some sort of internal adjustment

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Found rubber washer that is close to the proper size for the rpm.

Posted on Feb 12, 2008

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Posted on Jan 02, 2017

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1 Answer

How do I fix the speed of my Jensen JTA-460 turntable? I've tried numerous records that previously worked perfectly, but now the speed is too slow regardless of what album I try.


Could be the belt for the pulleys is stretched a little, or there is something making it slip, or the potentiometers were set incorrectly from the factory . It is normal to have one for each speed. It is unknown if you can access these from the bottom of the unit. Slippage is less likely to be caused by something oily, since it would alternate the speed faster and slower and yours seems to have worked then reached a constant slower speed. Do your 45's and 78's play ok? (yeah I know, does anyone have a lot of 78's on hand)
Your model does not have an outside pitch control to fine tune the speed faster or slower. Another Jensen model JTA-230 does. Entry level turntables such as yours are not speed accurate reliable. After reading reviews on your turntable, it's possible that the belt is the problem. If the slow speed problem had happened from the start, it would be safe to say that the speed wasn't calibrated correctly and you could have returned it and perhaps had better luck with another one but because it worked fine at the start and then now plays slower, it's either the belt or the potentiometer for the 33rpm speed has somehow changed.

May 23, 2017 | Jensen Audio Players & Recorders

1 Answer

The speed switch results in same slower speed than 33 rpm when set to 33 or 45, and 78 is slower than 78 rpm, but faster than 45 rpm


Assuming it is a belt driven turntable I suspect the belt has slipped out of position. It might need adjusting or replacing. If you do need to replace it make a note of how it fits, even though it could be in the wrong position. It's a starting point for putting the new one in the right position.

Dec 28, 2015 | Audio Players & Recorders

1 Answer

Technics SL-L2 won't switch to 33


Most turntable switch speeds by changing the drive wheel from the motor to the platen to either a smaller one or a larger one. This is a mechanical lever that moves the drive wheel up and down. You must open it up and see why it is not moving.

Feb 17, 2014 | Technics Audio Players & Recorders

1 Answer

Denon DP-61F Turntable Rotates Slower than 33.


The answer lies in that 33 button. The connections to the should be followed and investigated why it does play correctly when held.

Nov 10, 2012 | Denon Audio Players & Recorders

1 Answer

What's the correct way to use the strobe light to set turntable speed?


The turntable may have a pattern on the edge of the turntable. If not you need a turntable strobe disk that you place on the turntable like a record. The pattern on the disk or on the edge of the turntable will be marked for 50 Hz or 60 Hz frequency.
The strobe marks on the disk or on the turntable are for 33 RPM and 45 RPM and for both 50 & 60 Hz mains frequency.
To adjust the turntable for the correct RPM, turn on the strobe light and the turntable set it to 33 RPM and shine the strobe light on these marks and adjust the speed setting until the 33 RPM marks appear steady and not moving. You may want to check it for 45 RPM as well.
Make sure you use the correct mains frequency marks ie. the 50 or 60 Hz that your electricity system uses.

Feb 25, 2011 | Audio Players & Recorders

1 Answer

Akai Ap-003 belt drive turntable pitch problem


Hi!
Make shure that is a 50Hz turntable. If you connect a 60 Hz turntable in a 50 Hz system, the result is aprox 28 RPM in the 33 RPM position/

Dec 31, 2009 | Audio Players & Recorders

1 Answer

WHEN I PLAY A 331/2 RPM LP IT SOUNDS A LITTLE


The needle itself will not induce drag on the record. Even worn needles play no role in the problem you describe. The belt, provided it has suffcient tension to turn the platter, is doing it's job. The most likely source of malfunction is the motor itself. Try sliding the speed switch back and forth while the turntable is turning. If you see no difference in the speed between the 33 1/3 rpm setting and the 45 rpm setting, you have most likely eliminated all sources of the malfunction other than the motor. They are very prone to failure. If a replacement can be found, the job of installing it is not particularly difficult but indeed should be left to someone skilled at soldering electronic parts.

Dec 22, 2009 | Seth Thomas Pacconi Turntable

4 Answers

I have Thomas Pacconi turntable which is about 5 years old but only used a few times. I tried it today and the 75 switch works but it turns too slowly on 45 & 33 speeds. Model TPC 7475


Had the same problem & checked around on the net. Several people tried replacing the belt, but it had no effect. Spoke w/ several repair shops around the country and they concur with what I'd read on the net - bad motors. 3 or 4 repair/supply shops told me getting a motor would be impossible. Since I only listen to 33-1/3 LP's, I messed around w/ it a little and found a solution. Take the turntable out of the unit & you will find a small circuit board attached to the bottom. On that board is a small square blue fixture w/ a white circular "dial" in the middle (has grooves to accept a small straight blade or a phillips screw driver). This controls the voltage to the motor, which in turn controls the motor RPM's. If you set the selector switch to 78, you can experiment /w turning that white circular "dial" to slow the motor down. It isn't very hard to get the speed set properly. The down side is that you will only be able to play 33-1/3 LP's, but they are probably the most common anyways. I assume you could do the same to set the speed for a 45, rather than a 33-1/3. Down side is that you will only be able to play 1 size LP on the 78 speed setting, but it's an easy adjustment that can keep an otherwise in-op turntable functioning. Good luck!

Jun 25, 2009 | Seth Thomas Pacconi Turntable

1 Answer

My USB Turntable changes speed, at the end of a 33 RPM record


Get yourself a new turntable. ION units are very poorly made, and the company does NOT provide any sort of after market support. Once this breaks, you cannot fix. The company does not provide any parts or support for their products.

It's meant to break, and yours just broke. More than likely the IC (Integrated Circuit) that controls the 33/45 function has been damaged - you cannot get this part.

Sorry, couldn't be of much more help.


- OPTiC
Master Tech
Digital Analog Therapy
Turntable Repair : Turntable Parts

Jun 13, 2009 | ION Audio Vinyl Recording Turntable

3 Answers

Ion turntable speed problems


Turn the tturntable over, there is a speed control pot on the bottom

Nov 07, 2008 | ION Audio iTTUSB Turntable

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