From Ssl-wiki

DISCLAIMER

WARNING, DO AT YOUR OWN RISK. This guide is for informational purposes only. Changing the pitch range on your Technics can cause irreversible damage to the turntable if not done properly. Neither I, Rane or Serato take any responsibily for any damage this may do to your turntables.

Calibration

So why should I calibrate the pitch of my Technics? Well, over time you may notice that the pitches on your Technics do not match up. This may make it more difficult to match two identical tracks when beat juggling or doing doubles. You may also notice that the strobe dots on the platter, which represent the "real" pitch, do not match up with the pitch slider's number. For example, you may notice the +3.3% strobe dots don't stand still until +4.25 on the pitch slider. If this is the case, then you should recalibrate your pitch.

To begin, first power on the turntable and move the pitch slider to +6. Press start on the turntable and take note of the direction that the TOP row of dots move in the red strobe light. Are the +6% dots moving too fast or too slow? If you have to move the pitch slider higher (towards +8) to get the +6% dots to stand still, then it is too slow. If you have to move the pitch slider lower (towards +4) to get the +6% dots to stand still, then it is too fast. Remember this or write it down.

Next, UNPLUG the turntable. Remove your slipmat to show the bare platter...

Remove the platter by placing your index fingers in the two holes on the platter and your thumbs on the spindle and pull strait upwards. You will see a black plastic piece that covers the internal electronics...

WARNING Do not press the start/stop button when the platter is not on the turntable, this may and will cause irreversible damage the your turntable! You will fry the internal electronics.

Using a Phillips screwdriver, remove the five screws that hold the black plastic piece in place. Remove the black plastic piece to reveal the internal printed circuit board (PCB)...

In the upper right of the PCB you will see a potentiometer with the word PITCH above it. This is the pitch gain knob. The potentiometer to the middle right is the brake adjust gain knob and you will see the word BRAKE next to it.

Did you note which direction the +6% dots were moving before you started?

Using a screwdriver, turn the pitch gain potentiometer forward (clockwise) if the dots were moving too slow or backwards (counter-clockwise) if they were moving too fast.

WARNING, do not turn the pitch knob more than 1/8 a turn at a time. The pitch knob is very sensitive. Do very small turns at a time, testing each time by putting the platter back (you don't need to put the black plastic piece back on yet) on and testing the +6% strobe dots. If you need to adjust some more you should be able to fit the screwdriver through one of the holes on the platter to reach the pot. Once you have the +6% dots standing still at +6 on the slider, you are done. Take the platter off one last time, screw the black plastic cover back into place and put the platter back on. Repeat these steps for your other turntable. You now have a pitch matched set of Technics.

Acknowledgement

Credit for this article goes out to:

• Konix