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Step 9Pitch slider adjustment
If your dots were stationary you should not be looking at this step, proceed directly to the next one!
Before proceeding, disconnect the turntable from mains power again. DO NOT try to make any adjustment with the mains power connected!
The fine adjustment of the pitch slider is done using a small potentiometer on the main PCB under the platter. The adjustments are made using a phillips head screwdriver. Most likely this pot is in almost the correct position and the adjusments you will have to make are extremely small. We are talking fractions of a milli meter here! This can be quite time consuming.
The procedure is as follows:
1. Disconnect the mains power.
2. Remove the platter.
3. Remove the lid and locate the pot.
4. Make a tiiiiiiny adjustment either left or right.
5. Replace the lid.
6. Replace the platter.
7. Replace the mains power.
8. Turn the turntable on and check the dots.
9. Stationary dots? Congratulations; you are done. Proceed to next step in the instructable. If the dots are moving, go back to step 1.
As it's hard to place the pitch slider at "exactly +6%" you can take this into account. If the dots are moving ever so slightly left or right and you touch the pitch slider and they stop, I would say you are done.
As I understand it there is a more exact way to do this using a frequency counter or similar. I do not know how this is done though. I would think that this method is more than enough for most people.
Before proceeding, disconnect the turntable from mains power again. DO NOT try to make any adjustment with the mains power connected!
The fine adjustment of the pitch slider is done using a small potentiometer on the main PCB under the platter. The adjustments are made using a phillips head screwdriver. Most likely this pot is in almost the correct position and the adjusments you will have to make are extremely small. We are talking fractions of a milli meter here! This can be quite time consuming.
The procedure is as follows:
1. Disconnect the mains power.
2. Remove the platter.
3. Remove the lid and locate the pot.
4. Make a tiiiiiiny adjustment either left or right.
5. Replace the lid.
6. Replace the platter.
7. Replace the mains power.
8. Turn the turntable on and check the dots.
9. Stationary dots? Congratulations; you are done. Proceed to next step in the instructable. If the dots are moving, go back to step 1.
As it's hard to place the pitch slider at "exactly +6%" you can take this into account. If the dots are moving ever so slightly left or right and you touch the pitch slider and they stop, I would say you are done.
As I understand it there is a more exact way to do this using a frequency counter or similar. I do not know how this is done though. I would think that this method is more than enough for most people.
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