Question about Technics SL-1200 Turntable

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Pitch LED not working

Hello all, I''ve got an annoying fault where the Green pitch LED will not switch on when the pitch is locked (Centre of pitch slider), new slider fitted & new LED fitted but still no Joy, the pitch slider works OK & the speed remains stable, any ideas please! Barry

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LED probably burned out, or installed reverse (+/- reversed) - Or, you installed a clickless (MK3/MK5) pitch control in an MK2 turntable.

Did you do this yourself? Or did you have this professional done? If professionally, and the LED does not work, ask for your money back! This is electronics repair 101!

If you did this yourself, then more than likely you installed the LED backwards. The longer lead is the positive lead. If the LED did not burn out, you might be able to just remove it and switch it around. If it does not work, then it probably shorted (more than likely). Also make sure that none of your solder is touching. This could cause a bad short to your entire turntable. So you want to becareful.

If you need any further assistance, feel free to give our service dept a call. We are masters with the 1200s, and fix over 300 a year! 1.866.668.1596 ext 1

- TERMiNAL OPTiC
www.DJPROLAB.com

Posted on Apr 30, 2008

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2 Answers

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

There are 2 problems with the my deck: 1. The +-0 light for the pitch will not work but everything else about the pitch works fine. 2. The deck will not change from 33bpm to 45bpm, I have replaced the...


Hi, please do this test for me. With the deck running on 33 speed and the pitch control set to 0 use your finger on the platter centre and speed it up manually as much as you can. Doe's the quartz lock lamp come on? If not then open the deck up and loosen off the fixing screws on the circuit board that has the 33/45 buttons. Try to change speed with the board loosened off. If none of the above makes any difference replace the quartz lock neon. Use only original Technics neon. As a matter of interest have you done any mods to the deck? Cheers John,

Sep 29, 2011 | Technics SL-1210 Turntable

1 Answer

I own a SL1200 MKII and when the light "turn on" in the pitch control slider (green LED) the speed is not correct (big dots on platter move slightly) .Could you please give me some tips to solve...


Use the slide on the pitch control to move forward or backward until the dots stay steady. If it is a little old the quartz control won't work as well.

May 13, 2011 | Technics SL-1200 Turntable

1 Answer

Pitch wobble 1210


i had my decks fixed by these guys they are in london.

thier websites is www.technics1210repair.co.uk

they do technics turntable servicing

check them out.

im only spreading the word due it i had my decks fixed their and i am so pleased im telling everyone so they can get the same service i did, rather than paying over the odds at some **** toster repair shop.

alan

Apr 23, 2010 | Technics SL-1210 Turntable

1 Answer

Pitch adjust doesnt lock between 0% and +50%


There is a chip in the unit called a
phase lock loop ,( P.P.L )its use as station loc
for stereo turner. But the same applies.
Its drifting and unable to hold/lock
the signel is noisy that its trying to
lock on to (open ground) or the VCO
is out eather way it probley needs
to be replaced.

Hope that help a little

Jun 30, 2009 | Stanton STR8-150 Turntable

1 Answer

Pitch and Strobes


There is nothing wrong with your turntables. The Strobe dots are only a guide to give you an idea of the speed your platter is rotating. Nothing more, nothing less. The pitch control decal is not 100% accurate, it is simply a guide to tell you where the 6% position lies, 3.3%, etc.

As long as the quartz lock function works, and the large middle strobes are nice and solid, and do not move, your fine.

You can check out these videos for more insight into these wonderful turntables:

http://www.DJPROLAB.com


- Optic
Digital Analog Therapy
www.repairny.com
www.1200s.com

Sep 19, 2008 | Technics SL-1200MK5 Turntable

2 Answers

Platter problem


THE PITCH slider or the variable resistor could have gone faulty. A new pitch is only $25 i think. They may need to salvage the pcb from your old one as technics no longer manufacters them. I've never seen the pitch led stay on lock when the actual pitch is not at zero. Hopefully the pitch did not short out the brake or the variable resistors on the motor's circuitboard.



keep me poted.

Oct 25, 2007 | Technics SL-1210 Turntable

3 Answers

Pitch adjustment light is always on


Ok DJ,I use to Dj too,Probley you have moved the equipment quite a Few times,Is the Table Synchronous if so you might have some dust in you control throwing it off,Also Different locations have ac Voltage differences,Ck that too... Other wise go to radio shack and pick up some Contact cleaner Good luck let me Know ttech

Jul 24, 2007 | Technics SL-1200MK2 Turntable

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