In such cases, almost always visit to vinylengine will provide user and service manuals - but for the PL 514, it is unfortunately only user manual available:
From that very same link :
Submitted by mattyg
Very pleasantly surprised by the PL-514. One of the quietest, rumble free non-suspended belt drive tables I have come across and a very good budget table. Thanks to Vinyl Engine for the manual, it was a big help in setting the overhang adjustment. Pioneer should have included adjustment procedures in the manual, however.
BTW - The tonearm clearance issue IS NOT adjusted by removing the rubber plug next to the arm and adjusting the screw inside. That is the automatic return trip adjustment screw, and set it to trigger the return as close to the label as the arm can get.
The tonearm clearance adjustment is the little setscrew on the side of the lifting platform under the tonearm. Loosen the setscrew and adjust the arm's auto-return height, then tighten it back up. It requires a very small flat blade screwdriver.
However, do try to find out whether there is a service manual for a similar Pioneer TT - as the arms and auto return mechanisms tend to be pretty generic. While at it, depending on what you expect from a turntable, you can leave it as it is if it has "conviniently" disabled its auto return function. This in most cases when it is mechanically actuated does NOT come for free - it creates additional friction in lateral direction, limitting the ultimate trackability of that arm - and therefore lowering the sound quality attainable. Auto returns that do not come with this penalty are $$$ and far in-beetween, usually on TOTL TTs.
Whenever possible, I do disable it in decks with arms benefitting from such action - and if end of side auto lift is unconditional requirement, use Q-up instead.
I could give you a hug for that, going to need to try that later. Thanks!
It didn't line up with the hole at first, even after trying different adjustments it either stops too early on the record or returns and drops too early.
Second edit: May have fixed it.
Edited by GasMaskMan - 4/6/14 at 4:42pm