15 Dec
2009
15 Dec
'09
1:05 p.m.
I am wondering how useful a ROM listing is without
scheamtics. Surely for
something like this you need to know how the firmware interacts with the
hardware (what the various I/O ports do, etc), and that means (at least
to me) scheamtics and documented ICs.
What about a COMMENTED rom listing? :o)
For which you don't get service data, presumably.
ATAPI docs are all around.
The transport (motors, laser pickup, etc) is probably
the section most
likely to fail, and the section with the most alignment adjustments. I'd
need
service data on that.
Alignment? Oh, seems you never got a DVD player on your hands.
All the mech aligns itself with the servo info from the DVD player. The
only thing you can do is change the optical unit (ok, you can change the
laser diode) and adjust the bias current - which is the same procedure for
almost everything with a laser pickup. I have a XBOX and **never** had to
change the laser pickup. But I have a spare one in case it fails, just
drop-in and it works.
I respect your oppinion and admire your will to repair everything. I'm
your fan, as I said before. But don't be so anal retentive. There is a world
of good things around that has a simplified service manual. :o)