problems with my Adcom CD player
Shaun
I have a used ADCOM GCD-700 5 disk CD player that was given to me and it is
overly sensitive to vibrations, bumps and slight scratches on the CDs. I've
mounted it on vibration absorbing rubber and this has greatly impoved its
bump and vibration sensitivity, but it is still very sensitive to the
slightest mark or scratch on cds. How can I cure this.
thanks in advance,
Shaun
Tim Schwartz
If this machine is as old as I think it is, then its not worth putting
any serious money into it. There is likely a manufacturing date on the
machine that will give the month and year it was made. Make sure if
there are any transit screws on the bottom they are removed or in the
released position.
You could try cleaning the lens and the disc platter. You'd have to
open the machine to do this. the lens is about the size of a pencil
eraser, and is on a suspension, so be gentle with it. I use a cotton
swab moistened with lens cleaning fluid, though Windex will probably do.
I also clean off the platter that the disc sits on while spinning.
I've seen enough debris build up on the platter over time that it no
longer lets the disc sit flat, and that can cause all kinds of grief.
Again, a moistened swab or slightly damp cloth is all you need to clean it.
Beyond that, you are likely to have a worn out laser, which is likely
to be more expensive to replace than the machine is worth.
Regards,
Tim Schwartz
Bristol Electronics
Jeff Liebermann
First, clean out any crud from the laser head assembly. If that
doesn't improve things, replace it. That's a 1997 vintage machine so
parts may be tricky to find... Oh, too easy:
<http://www.adcomparts.com/part.php?item=46001400>
However, I don't think it's worth $50 to fix something that old.
More:
<http://www.fixya.com/support/p134391-adcom_gcd_700_5_disc_cd_changer>
<http://www.fixya.com/support/t648590-adcom_gcd_700_tracking_problems>
--
Jeff Liebermann je...@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Shaun
"Tim Schwartz" <t...@bristolnj.com> wrote in message
news:ijs5q6$u71$1...@news.eternal-september.org...
This CD player is a higher quality model and one of the only multidisk units
that uses high quality components. Mechanically it's not made very well
though, but the electronic audio stages are all class A, so it's worth my
time and some money to try to fix it.
Thanks for your reply.
Shaun
Shaun
"Jeff Liebermann" <je...@cruzio.com> wrote in message
news:4673m6prr0ls8tlmj...@4ax.com...
Thanks for the links, I'll probably order a new laser head for it, but first
I'll lake it apart and clean the lenses.
Shaun
Mark Zacharias
news:yOh8p.17738$D94....@newsfe20.iad...
Absolutely clean it. Should help.
Mark Z.
Arfa Daily
"Shaun" <ro...@nomail.com> wrote in message
news:yOh8p.17738$D94....@newsfe20.iad...
>
KSS240A lasers should be available from many sources for much less than $50.
This is a very 'bog-standard' laser made by Sony, and used in many
manufacturers' products over the years, as well as their own. Try to make
sure if you get one from a cheaper source, that it is a genuine Sony one
though. Of all of the KSS series replacement lasers, I've found the '240 to
be probably the most critical, when used in most manufacturers' machines.
Arfa
Jeff Liebermann
<arfa....@ntlworld.com> wrote:
>KSS240A lasers should be available from many sources for much less than $50.
>This is a very 'bog-standard' laser made by Sony, and used in many
>manufacturers' products over the years, as well as their own. Try to make
>sure if you get one from a cheaper source, that it is a genuine Sony one
>though. Of all of the KSS series replacement lasers, I've found the '240 to
>be probably the most critical, when used in most manufacturers' machines.
Oops. I didn't recognize the Sony part number. Plenty all over the
web
<http://www.google.com/images?hl=en&q=KSS-240A>
and $17-$31 on eBay.
<http://shop.ebay.com/i.html?_nkw=kss-240a>
N_Cook
Then after cleaning and before ditching. Find the "power pot" ,measure
resistance with a DVM , "both ways" in case of a difference, so you can get
back to that value. Change the value , no more than 5 percent, to see if it
improves error proneness
Arfa Daily
"N_Cook" <div...@tcp.co.uk> wrote in message
news:ijtmjf$g22$1...@news.eternal-september.org...
It's not quite that straightforward on a '240, as there are three pots on
there, and considerable interaction between them. I would not recommend
touching them, as at least one of them is *extremely* critical in its
setting to get the thing to play at all.
Arfa
N_Cook
news:msF8p.28752$Xf4....@newsfe13.ams2...
Which implies 3 analoguey things that could drift over time. I would take 3x
0.1 percent measurements and tabulate some twiddlings v drop-out time of a
known bad ie deliberately scratched track on a CD. As last legs anyway,
nothing to loose except a bit of time
Shaun
I'm sure I can find a few CDs that are scratched in my collection.
shaun