I recently noticed that my pitch at +6 doesn't keep the platter dots steady, its closer to 7, so I did a bit of research and found that I could calibrate the deck myself, I set the resistance to 2.875 K ohms as stated in the service manual using pot VR302, I then connected my multimeter probes to TP27 and GND to get a reading for frequency so I could make sure its at 262.08 but no reading comes up on my meter for some strange reason (I reconnected the pitch plug and powerd up the deck) so I decided to do it by eye and adjust the pot at VR301 until the +6 dots held steady, once I was happy I then moved the pitch slider to zero and found that the dots were now moving. My question is how can I adjust the +6 to hold without then messing up the zero point. TIA
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