"N_Cook" wrote in message
...
Neither me or owner will spend out on a new optical unit (failed laser),
big spondulics. But a near industry standard KSS 213C looked somewhat
similar , so I tried it out. This one laying around , unknown condition,
from some scrapped something. The ribbon feed lines for the 3 laser pins
matched , the other 2 deck motor+switch leads matched up, so tried it out.
Laser lit but logic of the end stops wrong so swapped the optical unit
across to the original (scrapper would not have mechanically fitted in the
Denon anyway). Required some bodging to fit, straightforward but too much
for detailing here, but sledge etc worked .
Adjusted power pot and cleaned lens and now consistently reads data track
and plays about first 2 minutes track1 of any CD I try, faulters and
stops, will not play any track 2 or higher.
I suspect the registration of the centre limit switch is out, but could be
a problem with the rack although powers up and down the slide without
incident with only 2 volt on the motor, but I will try marking rack and
cog of the 2minute stoppages. I assume a new (cheap) KSS 213 would show
the same stoppage.
So how to adjust the end stop , ? pieces of shim material added and
subtracted in the gap between sledge and leaf switch and suck it and see?
or some other problem likely?


I think this is a sled motor issue; I have never seen any limit switch other
than the inner (start) switch. As the tracking coil reaches it's physical
limit, a player will skip or "falter and stop" just like you describe, if
the sled does not advance.Check the voltage across the sled motor as this
process unfolds. At some point the voltage should increase to kick the sled
forward. Maybe there's a mechanical obstruction, maybe you still have wiring
issues.

Mark Z.