A year or so ago, I got interested in picking up old LP's from thrift stores. So, I dug out my early
80s Sharp RP-113 linear tracking TT. Hadn't been used in at least 15yrs and the belt was turned
to sticky goo. I got a new belt and put it into use again:
It seems to work "mostly" fine, but the tone arm usually
does not auto-return to "home" at the end
of playing the record. Once in a while it will but most often I need to press the "start/cue" button to
get it to retract. I don't remember it doing that when I used it back in the 80s.
Also, I noticed that the tone arm up/down button when pressed works but the tone arm usually "pops" backwards about 1/4" when it lifts off the record and the needle is out of the groove. I don't recall it doing that
way back when either.
This makes me concerned the servo mechanism is not tracking the record correctly and is lagging behind and being "dragged" by the record grooves too much. Also along those lines, the sound is often a bit staticy/stratchy sounding with certain types of instruments like horns and trumpets and this is with very nice cond. clean records that are otherwise very quiet.
Is there some sort of adjustment or ?? I should be looking at? I have the original owners manual that includes a schematic but there are no other service info. I know from the schematic this unit uses LEDs and phototransistors to detect where the tone arm is for the servo mechanism.
Thoughts? and thanks.