Quote:
Originally Posted by Ed in Tx
After seeing that melted down rubber goo on the spindle, I wonder about the material used for the mirror suspension.
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I spent a few days looking over the optics and reading the manual and that I've been able to tell without having to remove set screws and aligned parts there is no rubber used in the entire laser platform. Tangental tracking and focusing is performed using permanent magnets and coils.
I'm currently experimenting with various sized inner tubes to replace the rubber sleeve. So originally it was a rubber cup that's exactly the diameter of the hub ring on a laserdisc and the spindle. The spindle latch is a tapered assembly that under spring load is extended. When you press down to lock the disc the tapered portion pushes the sleeve of the cup outwards and uniformly holds the disc by the hub. Right now I have a bicycle inner tube that is a close fit but a millimeter or so too wide, so I have to hunt down another one to see if I can get a better fit. If it's too loose it overhangs the spindle and the disc won't fit.
This is the assembly disassembled, plus the manual diagram.
This is the cup itself. MCA and Pioneer list the part number VXX-003 "Rubber Plate Assembly". Pioneer's parts department still lists it as existing and costs $51.20 however as of this post the page indicates it is no longer available. -
http://parts.pioneerelectronics.com/...tNum=VXX%2D003
Note the yellow material is the original adhesive that was used to bond the rubber to the disc.