"jango2" wrote in message
oups.com...
Does this unit have any presets for Focus and tracking gain / offset
/error adjustment. What if an electrolytic in the focus circuitry has
drifted a bit in value causing improper gain or bias?. The objective
lense might not traverse through the required excursion for an FOK flag

to be generated. Tilting the lense would put it on an inclined plane,
less drive would be required for it to traverse enough for good focus,
FOK is read, spindle is switched on.
I've seen this "jump" or "search" capacitor hanging in the periphery of
the servo ic quite often. Can't remember if it's in the focus or
tracking servo.
Jango

Hi Jango - how's it going ? Long time no speak. This scenario is possible,
but I can't say that I've ever had such a fault. It was suggested early on
that various adjustments were tried, but I advised the OP against it unless
he had the necessary service info and expertise in CD player repair, as I
felt that there was almost certainly a much simpler, probably mechanical
explanation for the symptoms, and that inappropriate twiddling might well
compound the problem. It's actually pretty rare to have to ever adjust any
of these pots from their original settings, in my experience. However, it
might now be the time to try a very small adjustment one way and then the
other of the focus offset pot, after first carefully marking, or measuring
the position that the pot is originally set at, to see if it can be
persuaded to work on the flat.

Arfa