I don't have a Lector, but it sounds like you need a little work to the transport and/or laser. Could be a simple as cleaning the laser's lens yourself if you can figure out how to access it. Works for me.
When my last laser/transport failed (of Sony manufacture) I replaced it at a cost, including labor, of $175. I had dealers repair quotes on this of $400 and $450. With identical complaints to yours BAT replaced a BAT laser/transport for $450.
Personally, if I really liked the CDP's sound I would have it repaired by a qualified and respected shop in your area.