Martin Norberg
mzcrb@*NO_SPAM*my-deja.com
How did you clean the laser?
Subject: Onkyo Integra CD player info?
From: marz...@utsukushii.net (Martin Norberg)
Date: 9/24/101 9:29 PM EST
Message-id: <6b63df9f.01092...@posting.google.com>
I tried different discs, watching the eye pattern getting weaker on
CDRs (but it still played them, unlike some old players). The thing
is, I am expecting more of this machine. There is some money spent
inside it, obviously, and that is why I'd really like to fix it
properly.
> There are CD cleaners out there for that purpose.
>
Yes, but they are not very good at removing old tobacco residues
etc...
> How did you clean the laser?
With cotton sticks and isopropyl alcohol, like it should be done.
I'm trying to get a service manual for the unit but I don't think it
will say much about what OEM manufacurers really made the transport.
Martin
Martin
>So, they are all related? Even if I monitor the test points (FE, TE)
>with a meter or scope? What sort of voltages should I expect if the
>player is slightly misaligned/good?
>I think the machine was made '89 or so. The DACs are 16 bit Burr Brown
>PCM58, looks like the predecessor to the PCM63 but no data sheets are
>to be found on the net so far.(And that's sad because I know a nice
>tube mod to try ;-)
>I still think some new parts like a spindle motor and a laser block
>would be useful if I only new who made them and if they're in stock
>somewhere... Any ideas very much welcome.
I have not seen the beginning of this thread nor do I know this
machine but.......
1- A machine from 1989 can be easily outperformed by many cheaper
machines today.
2- I have the datasheets for the PCM58 but I do not believe that the
efforts or new parts are warranted on this.
Kal
I partly agree with you, because most machines are not worth
repairing. This one, although a little flakey, has some bells and
wistles of modern high end machines, like optocoupling, optical and
coaxial digital out, alumitium tray and several layers of sheet metal
and so on. A new one (even just a transport without internal DAC)
with these features would be a little more expensive than those I
think you are referring to.
I'd really like to know the pinout and data for the PCM58. I already
have a separate DAC, but I'd like to do some experimenting with the
analog section inside the player. Dare I ask if you could mail it to
me? :)
Martin
proper tracking and focus will output zero volts at the output of the
comparator, as the output is applied to a signal amplifier but causes no
correction to occur to the lense.
Also, you should get your standard 12 volts and five volts on the servo system.
I also have a DX5700; built like a tank, good electronics and
easily suited for modifications. Lots of attention paid to
electrical design details that folks rag on today, like low jitter
clock design, etc. If you have the guts, patience, time and skill,
the electronics can be upgraded to be on par with some of today's
stuff.
Anyways, back to your question. I had similar symptoms to those
you mention. For me, cleaning didn't help, nor did adjusting
trimpots. I have the service manual. I checked my transport
thoroughly and found out the cable that connects the optical
pickup to the mainboard had several breaks in it. I figured since
it was old and a laser replacement was probably about due anyway,
it would be easier to simply replace the optical pickup assembly.
I've had no luck finding one anywhere, including Onkyo service. I
searched around on EBay for folks selling junk DX5700 or similar
models I could steal transport parts from, but no luck there
either. Let me know what you find out, mine is still on my bench
in the basement with guts hanging out, waiting......
And if you give up on yours and want the parts to go to a good
home, let me know :-)
Just for grins, have you ever considered getting a totally new and
different design transport to see how difficult electrically and
mechanically it would be to get it to work? Just curious.
There were some Philips mechansims (CDM5? or something like that)
a couple of years ago that were touted as being well-built, good
performers. I'd like to get one and experiment.
Good luck and let me know what you find out!
Michael
email is: mlloyd1 at enteract dot com
> Subject: Onkyo Integra CD player info?
> From: marz...@utsukushii.net (Martin Norberg)
> Date: 9/24/101 9:29 PM EST
> Message-id: <6b63df9f.01092...@posting.google.com>
>
> Hi all,
> Anybody know anything about the big old Onkyo Integra 5700 CD
player?
> I have one here and it is sort of working but needs some caring
> attention... (warning: hobbyist alert!)
> Martin Norberg
> mzcrb@*NO_SPAM*my-deja.com
--
I am not familiar with your unit in detail. The laser emission may be
down just a little. If this is the case, by increasing the laser bias
just a little to compensate, this may fix the problem.
On the laser head, see if there is a small pot. Mark where it is, and
try moving it a bit. I would try clockwise to start. If it gets
worse try the other way. Move it about 2 to 5 degrees at a time. If
you ae going the wrong way, just move it back to the mark you made. If
the unit starts to play the CD's properly, then leave it where it is.
On some units the laser current pot is on the main circuit board.
Increasing the laser current by a large amount will reduce the life
span of the laser. However, over the years I've done this on a number
of machines to compensate for a weak laser, and the machines performed
for a long time afterwords.
Jerry Greenberg
http://www.zoom-0ne.com
--
jerr...@hotmail.com (Jerry Greenberg) wrote in message news:<460a833b.0110...@posting.google.com>...