Question about Teac P-988 Turntable

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Hi All. Have a old Teac P9 Turntable based on DC Brushless motor. Its PLL controlled. However the speed is not constant, The PLL does not seem to lock the speed. I have the schematics and service manul. Need to know if someone had issues with PLL and the hints that might help. Thanks Karatzdi.. Niewbie on this site.

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Hi there. Do you have a service manual of this Teac? Please let me know - I am searching for it with no results. Best.

Posted on Dec 19, 2010

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My JVC turntable has no plug, just a 10-13v lead


Probably as long it produces DC. However you will have to adjust the speed. As the unit was set for a certain voltage which wouldn't change. It will either go fast or slow depending on what the original voltage was. The speed adjuster will either be two presets one for each speed that could be located under the turntable base (covered by a sticker) or on the power board of the deck. Or they might be on the motor itself.

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My Sony PS LX 430 turntable will only revolve 3.5 times and the needle is set to high to make contact with the vinyl


The speed controls might be underneath the turntable base. Sometimes covered up with white stickers. On other models you have to remove the bottom side to get access to the PC board, where the controls can be found. On cheaper models the speed controls are on the motor itself.

Jan 19, 2014 | Sony PS-LX250H Turntable

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Recently purchased used Panasonic SL-HM42 turntable. Works, but turning a little slow on 33rpm (30-31rpms) says DC Servo System on the front. Don't see any set screws on bottom. would like to get platter...


How to tweak the playback speed on Panasonic SL-HM42 turntables
recently-purchased-used-panasonic-sl-jxgmd5u3zcskalhaccgps5fw-3-20.png

You will need:

  1. 1x small Philips screw driver
  2. 1x small flat-head screw driver
  3. An ear for correct pitch and a little bit of DIY skill!

Step 1 - Remove the wooden base plate

After ensuring that you've removed the the rubber turntable slip mat and securely docked the turntable arm, carefully flip the turntable over onto its lid to expose the wooden base plate, as per below.

Using the small Philips-head screw driver, remove the screws holding the wooden base plate in place, then gently lift the base plate off the turntable.

recently-purchased-used-panasonic-sl-jxgmd5u3zcskalhaccgps5fw-3-26.png

Step 2 - Expose the pitch adjustment screws

Once the wooden base plate is removed, you will see the speed-controller circuit board on the right-hand side.
recently-purchased-used-panasonic-sl-jxgmd5u3zcskalhaccgps5fw-3-50.png

To expose the the two speed/pitch-control screws, firstly remove the screw holding the speed-controller circuit board in place, then gently lift the circuit board up on the free side.
recently-purchased-used-panasonic-sl-jxgmd5u3zcskalhaccgps5fw-3-41.png

Step 3 - Correct the turntable playback speed and pitch

The easiest way I found to correct the playback speed was to flip the turntable carefully back into the original position, allowing the speed-controller circuit board to hang free as shown below.

recently-purchased-used-panasonic-sl-jxgmd5u3zcskalhaccgps5fw-3-60.png

Next, play a record that you know well and are able to tell when the speed/pitch is correct (assuming you have an ear for correct pitch, that is!), then at the same time using the small flat-head screwdriver, gently turn the speed adjustment screw(s) to adjust the playback speed up or down until the correct playback speed and pitch is achieved (or at least until it no longer annoys you ;).

Turning the screws clockwise (to the right) will increase the speed/pitch, and anticlockwise (to the left) will decrease the speed/pitch.

NB - Both screws allow for fine pitch control, so if the second is already at maximum speed, you can use the first screw for additional speed.
Step 4 - Reassemble the turntable again

When you're happy with the speed of your turntable, remove the record, the mat again & locking the turntable arm, replace the screw holding the speed-controller circuit in place (as per Step 2) and then finally replace the screws holding the wooden base plate, as per Step 1.
Happy listening!

Aug 29, 2013 | Turntables

1 Answer

I have a sansui FR-D25 automatic pll dc servo turntable. it hasnt been used in a couple of years due to a broken stylus. i have purchased a new one but now the metal plate sounds like its grating on the...


You will have to remove the bottom cover and pull the center post off. There is a set screw that holds it in place. Once removed you will need to clean the hole out of dirty grease and oil with a q-tip and alcohol. Then put some new oil in the hole. Just a small amount. Sewing machine or turntable oil or similar. Not motor oil! When put back together that will cause the platter to rise up and away from the base. You may also check the plastic gears under platter attached to the post to see if the are broken or cracked. If it is you have a major problem and it will need to be replaced with a donor part.

Aug 22, 2013 | Turntables

1 Answer

AFTER adjusting the speed setting to 33, all the records are playing too fast, they sound like chipmunks. I tried all three settings and while each speed is different from each other they all seem to be...


If it says your speed setting in on 33, than you have a problem with the speed control inside of the turntable, there is not much you can do in that area. 33 is the slowest speed too, so it seems like it is stuck on 45 or 78. Call Teac if you are still under warranty.

May 15, 2011 | Teac SL-A100 Turntable

1 Answer

I have a Sherwood PD - 913 R and the pitch seems to be spinning out of sync which makes the RPM"s not right for 33 or 45 speeds, any help on what could be the cause is appreciated. There is a pitch...


The turntable motor might be the problem, if the grease is old it becomes hard causing the turntable to run slow, by your description we can rule that out since you indicate it runs to fast. therefore it is the voltage that powers the motor with a regulator "keeps voltage constant" or the motor itself will be the problem. The pitch control allows a small change in speed when required.

Dec 30, 2010 | Turntables

1 Answer

Teac turntable plays too fast


This sounds like a motor speed control problem. It could be either the motor itself or an electronic fault. So unless you know a bit about electronics and know how to use a soldering iron etc, then the answer to your question is no.

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1 Answer

My TEAC P688 is stuck in chipmunk mode for a large record - how do I slow it down?


Sometimes on the base of the turntable (under side) there are two presets one for the 45 speed and one for the 33. They might be hidden under a label or something. You might even have to go inside to find them. Anyway a small flat head screwdriver inserted in it should adjust the speed. You might have to work out which controls 33 speed. And of course if it is below you will have to figure out how to adjust it with a record playing. "Get out and get under!!!!" as they said about cars!

Jun 28, 2009 | Teac P-A688 Turntable

1 Answer

Teac turntable belt came off.. help!


Through the 2 holes on the platter, lift the platter up. Take the belt, flip the platter over, and stretch it around the center ring. Flip the platter back over and turn to so one of the holes is over the spinning motor. With your finger or with a blackstick, stretch it back onto the motor head.

Also check the belt for wear....that should do it.

Keep me posted.

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