Unlike RX1500, DDX1500's platter does not have any screws on the surface, nor beneath the spindle. I try to pull the platter out of the spindle, failed. I am sure it must be locked together with the motor under the platter.
i found that giving it a firm upward tug was the only way to break that mechanical bond, so go ahead and try. i cleaned the contact surfaces with a soft cloth and left them dry, no oil. the bearings should be oiled as per the mfg.
the mechanical bond is made when the 2 machined surfaces seat together. it is designed and machined to be a perfect fit. all you need to do is gently sit the platter back in place. the parts will mate naturally.
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