> It looks like you have found a new "spring problem". This time it is not
> Philips, but Yamaha that should take its responsibility for bad design. It's
> likely that the heat development in the burner affects the connection of the
> fine wires.
> Can you give some kind of manual on the repair you executed? In this way other
> owners of an "out of warranty Yamaha" could take a look if they can confirm the
> broken wire connections.
> > What I discovered was one of the VERY fine wires from the focus coil had
> > broken off at the connection point below. With a good light, magnifying
> > glass and very fine tipped soldering iron I managed to solder the wire back
> > onto its pad. The same wire had broken on both machines!
> > There are four of these very fine wires which flex whenever the lens moves.
> > It seems to me that all CDR400's will suffer from this problem sooner or
> > later, which is a shame because the drive is solid otherwise.
that's interesting! i also have this problem since many months with my
400t and i already tried many strategies to fix it, e.g. i greased the
lasertransfer and the tray-mecanics, but all i did only helped
approximately for the duration of one week, then the problem returned.
it is a sort of "sometimes-problem", it doesn't occur all the time, but
quite often. when i tried to find the reason for this, i operated the
drive after opening its upper cover, but then it didn't occur. it
occured after closing the case again! very annoying! so i was sure that
it is related with some mechanical stress (not heat! - heat was never a
problem for my unit because i cooled it from the first day of usage).
well, i didn't check the wires of the focus coils, but i'll do it next
time... thanks for the tip!