I have an "older" Sony CDP c505 5 disc player that has sound problems
as you go past track 3 or 4 (or to the outer edge of the CD itself) it
is kind of like cutting in and out and distortion ? Any adjustements I
can do to make this go away?

"Binder Dundat" wrote in message
oups.com...
I have an "older" Sony CDP c505 5 disc player that has sound problems
as you go past track 3 or 4 (or to the outer edge of the CD itself) it
is kind of like cutting in and out and distortion ? Any adjustements I
can do to make this go away?


First check that the sled movement is absolutely free - that there is no no
grease on the slides that has gone 'sticky'. Problem could also be the sled
motor, the spindle motor, possibly the laser itself (make sure that the lens
is absolutely clean and shiny), or the surface mount electrolytics on the
servo board that are known trouble causers on the older Sonys. It is
unlikely that your problem can be cured by adjustment. Do not attempt random
adjustment, as this is only likely to compound the problem.

Arfa

In article ,
"Arfa Daily" wrote:

First check that the sled movement is absolutely free - that there is no no
grease on the slides that has gone 'sticky'.

Could also be a gear with a missing tooth - I had a Sony Discman which
had that problem, about 20 minutes into a disc it would get stuck at one
spot and just keep repeating. The missing gear tooth was on the drive
which moved the optical pickup from the centre to the edge during play.

"Matthew Kirkcaldie" wrote in message
...
In article ,
"Arfa Daily" wrote:

First check that the sled movement is absolutely free - that there is no
no
grease on the slides that has gone 'sticky'.

Could also be a gear with a missing tooth - I had a Sony Discman which
had that problem, about 20 minutes into a disc it would get stuck at one
spot and just keep repeating. The missing gear tooth was on the drive
which moved the optical pickup from the centre to the edge during play.

Quite so, I'd forgotton that one, but you will of course pick up that
problem when checking the sled for freedom of movement. Another fairly
common one that can cause the same problem, is a split in the nylon pinion
on the shaft of the sled motor. If you push the sled manually down the
slides, you can feel it go bump-bump-bump as the gears rotate. Nothing can
be done about that one, except to replace the pinion from a scrap deck.

Arfa

"Arfa Daily" wrote in message
...

First check that the sled movement is absolutely free - that there is no
no
grease on the slides that has gone 'sticky'.

What's a good lube to use on the slides and etc.? I have a c335 that's
working okay now but due to age probably should be opened up cleaned/checked
and re-lubed.

Thoughts??? RM~

On Apr 1, 6:55 am, "Arfa Daily" wrote:
"Matthew Kirkcaldie" wrote in message

...

In article ,
"Arfa Daily" wrote:

First check that the sled movement is absolutely free - that there is no
no
grease on the slides that has gone 'sticky'.

Could also be a gear with a missing tooth - I had a Sony Discman which
had that problem, about 20 minutes into a disc it would get stuck at one
spot and just keep repeating. The missing gear tooth was on the drive
which moved the optical pickup from the centre to the edge during play.

Quite so, I'd forgotton that one, but you will of course pick up that
problem when checking the sled for freedom of movement. Another fairly
common one that can cause the same problem, is a split in the nylon pinion
on the shaft of the sled motor. If you push the sled manually down the
slides, you can feel it go bump-bump-bump as the gears rotate. Nothing can
be done about that one, except to replace the pinion from a scrap deck.

Arfa


Thanks, but I probably did not explain the problem very well, the
laser assembly moves back and forth fine. The problem with the outer
tracks is the sound quality deteriorates as you go farther out on the
edge of the discs. It is not skipping, it seems the sound goes high
and low and is slightly distorted as well?

"Rob Mills" wrote in message
...

"Arfa Daily" wrote in message
...

First check that the sled movement is absolutely free - that there is
no
no
grease on the slides that has gone 'sticky'.

What's a good lube to use on the slides and etc.? I have a c335 that's
working okay now but due to age probably should be opened up
cleaned/checked
and re-lubed.

Thoughts??? RM~


The official stuff is called "floil". It's a white synthetic lubricant a
little thicker than light oil, but thinner than you would usually consider
as 'grease'. I have an aerosol can of a light synthetic machine oil called
"CMO" (Clear Machine Oil) made by Electrolube. It's a little thicker than
sewing machine oil, and has very good 'cling' characteristics on chrome
plated slide rods, and seems to lubricate nylon against metal quite
acceptably. It is also absorbed readily into phosphor bronze 'oilite' type
bearings that are found on sled and spindle motors, and sometimes on the
laser slide rod bearing surfaces. It is a good all-round product for all the
lubrication jobs on a CD / DVDdeck, and I have used it for just this, on a
daily basis, for some years.

Arfa

"Binder Dundat" wrote in message
oups.com...
On Apr 1, 6:55 am, "Arfa Daily" wrote:
"Matthew Kirkcaldie" wrote in
message

...

In article ,
"Arfa Daily" wrote:

First check that the sled movement is absolutely free - that there is
no
no
grease on the slides that has gone 'sticky'.

Could also be a gear with a missing tooth - I had a Sony Discman which
had that problem, about 20 minutes into a disc it would get stuck at
one
spot and just keep repeating. The missing gear tooth was on the drive
which moved the optical pickup from the centre to the edge during play.

Quite so, I'd forgotton that one, but you will of course pick up that
problem when checking the sled for freedom of movement. Another fairly
common one that can cause the same problem, is a split in the nylon
pinion
on the shaft of the sled motor. If you push the sled manually down the
slides, you can feel it go bump-bump-bump as the gears rotate. Nothing
can
be done about that one, except to replace the pinion from a scrap deck.

Arfa


Thanks, but I probably did not explain the problem very well, the
laser assembly moves back and forth fine. The problem with the outer
tracks is the sound quality deteriorates as you go farther out on the
edge of the discs. It is not skipping, it seems the sound goes high
and low and is slightly distorted as well?


OK. Well basically, it is not possible for the system used to play a CD, to
produce distorted sound as a result of track position, unless the system is
dropping so many bits, that it has got beyond the capabilities of the error
correction circuitry. This can occur as a result of tracks being closer to
the end of a disc, for one of two reasons. The first is a defective spindle
motor. As the laser tracks towards the edge of the disc, the disc's
rotational speed slows to maintain a constant data rate from the pickup. If
the motor gets poor, this can result in its shaft speed becoming erratic.
The slower the motor is running, the more pronounced the problem is, until
data starts to become so mis-timed that bits start getting dropped. This can
result in a harsh 'crackly' sort of distortion that can get as bad as total
music drop-out, as the error correction throws up its arms in dispair, and
instead mutes.

I have also known a similar thing to occur with a weak laser. Now in theory,
there is no real reason that this should happen, as the reduced disc speed,
should result in the laser seeing data at exactly the same rate. I suspect
that it is in fact a combination of both a slightly worn, and thus slightly
unstable motor, with a weak laser. If the laser is replaced, the marginal
motor becomes 'masked' and the player works fine again. Motor is now the
first place I would be looking.

Arfa

On Apr 1, 12:55 pm, "Arfa Daily" wrote:
Another fairly
common one that can cause the same problem, is a split in the nylon pinion
on the shaft of the sled motor. If you push the sled manually down the
slides, you can feel it go bump-bump-bump as the gears rotate. Nothing can
be done about that one, except to replace the pinion from a scrap deck.

Sorry to hijack this thread. Just remembered something. ARFA: I have
an ONKYO cd player gathering dust with this cracked sled pinion
problem; any ideas on sourcing a replacement or shall I just toss it?
(it's not a 'high end' deck anyway).
-B.

"Arfa Daily" wrote in message
...

It's a little thicker than sewing machine oil, and has very good 'cling'
characteristics

Sounds good, might even be good for printer rail also.
Thanks, RM~

"b" wrote in message
oups.com...
On Apr 1, 12:55 pm, "Arfa Daily" wrote:
Another fairly
common one that can cause the same problem, is a split in the nylon
pinion
on the shaft of the sled motor. If you push the sled manually down the
slides, you can feel it go bump-bump-bump as the gears rotate. Nothing
can
be done about that one, except to replace the pinion from a scrap deck.

Sorry to hijack this thread. Just remembered something. ARFA: I have
an ONKYO cd player gathering dust with this cracked sled pinion
problem; any ideas on sourcing a replacement or shall I just toss it?
(it's not a 'high end' deck anyway).
-B.


Hi B

I have found that in general, most of the pinions are about the same size,
and you can usually get away with + / - one tooth without noticing a
problem. The shaft size is close enough on all of the motors that are
currently used. Most come from the Mitsumi stable anyway. I keep a junk box
with a variety of old decks for exactly the reason of culling odd little
parts like this, that would otherwise write off a perfectly good item. If
you don't have such a thing yourself, it would be worth paying a visit to
any local repair shop that you might still have near you. They are sure to
have piles of scrap CD and DVD players out back, that they would be happy
for you to relieve them of. Another possibility might be an old computer CD
drive ? Local waste tip also ? I see lots of the cheapo little supermarket
hifis dumped at my local recycling centre. Often, these have a CD player in
the top, and just by opening the lid, you can see if the deck is in any way
similar enough to yours to have a part that you can use. I don't see much
Onkyo stuff, so I don't recall much about the decks that they use, but many
manufacturers just use 'off the shelf' Sony or Sanyo decks, so you might
even find the exact same one in the last place you might expect.

Arfa