Trying to repair CD-player, genuine Sony parts??
 

I am trying force my temperamental CD player back in line. It
has always had a somewhat troubled personality. It often refused
to play the last few tracks of a few of my CDs. It has come up
with a new trick lately. It refuses to even acknowledge the
existence of certain CDs (they work fine in all other players
I try) and in some cases it ignores certain tracks.

I started by cleaning the mechanics and then the optics hoping
dirt was all that had happened. This didn't help at all.

Next I thought, maybe the laser is loosing power. I read some-
where that it wasn't hard to replace the laser and it didn't
look hard (I am a microwave engineer). A quick Internet search
told me a replacement laser wasn't costly, some 15 euro at
amazon.co.uk including shipping.

The laser is a Sony KSS-213C. What I actually ordered and
received within five working days was a subassembly including
two motors and a steel plate. It is called KSM213CCM. It is
what I find inside my CD player and replacing it is easy
enough.

But the unit I received was dead on arrival. It had taken a
knock or two on the way and the skimpy packaging had not
protected it. Apart from loose plastic parts it also contained
a dead laser. I use an old digital camera as an IR detector.
The old laser is easily detected and shows up on the display.
The new laser emitted no useful light. I sent it back and the
vendor sent a new unit that got lost on the way.

Now I have received a third unit and it is not dented but
still it does not work. It does not spin its disc motor when
I insert a CD. I have replaced the new laser so I have the new
sub assembly with the old laser and now it works. Nothing wrong
with motors in other words.

I also notice the new laser (if it indeed is a laser) emits
light visible to my unaided eyes. It actually flashes three
times after I close the CD tray. And then nothing happens.
The old laser emits steady IR.

Shouldn't CD lasers emit IR light?
How do I check if the new laser is a genuine Sony KSS-213C?
(Yes, I have tried a form on Sony's web.)

TIA,

/Martin (in the marked for a new CD player, I guess)

Trying to repair CD-player, genuine Sony parts??
 

I don't know about the laser, but I do seem to recall one of the reasons for
cd players failing toward the end of the side was play in the mechanism, ie
wear. It can also be due to vibration of course, but that often happens
because the cd is crap and results then vary on different machines, but
there is always a bit of a problem with them.

It is very unlucky to get so much rubbish spares when just rdering one
part, not to mention loss in the mail. Could be that Sods law is trying to
tell you something. Its very odd though that if it did work, new parts don't
fix it. I assume there are some setup controls somewhere or is it all
supposed to be self calibrating, I'm a bit out of touch these days.

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"Martin "Schöön"" wrote in message
...
I am trying force my temperamental CD player back in line. It
has always had a somewhat troubled personality. It often refused
to play the last few tracks of a few of my CDs. It has come up
with a new trick lately. It refuses to even acknowledge the
existence of certain CDs (they work fine in all other players
I try) and in some cases it ignores certain tracks.

I started by cleaning the mechanics and then the optics hoping
dirt was all that had happened. This didn't help at all.

Next I thought, maybe the laser is loosing power. I read some-
where that it wasn't hard to replace the laser and it didn't
look hard (I am a microwave engineer). A quick Internet search
told me a replacement laser wasn't costly, some 15 euro at
amazon.co.uk including shipping.

The laser is a Sony KSS-213C. What I actually ordered and
received within five working days was a subassembly including
two motors and a steel plate. It is called KSM213CCM. It is
what I find inside my CD player and replacing it is easy
enough.

But the unit I received was dead on arrival. It had taken a
knock or two on the way and the skimpy packaging had not
protected it. Apart from loose plastic parts it also contained
a dead laser. I use an old digital camera as an IR detector.
The old laser is easily detected and shows up on the display.
The new laser emitted no useful light. I sent it back and the
vendor sent a new unit that got lost on the way.

Now I have received a third unit and it is not dented but
still it does not work. It does not spin its disc motor when
I insert a CD. I have replaced the new laser so I have the new
sub assembly with the old laser and now it works. Nothing wrong
with motors in other words.

I also notice the new laser (if it indeed is a laser) emits
light visible to my unaided eyes. It actually flashes three
times after I close the CD tray. And then nothing happens.
The old laser emits steady IR.

Shouldn't CD lasers emit IR light?
How do I check if the new laser is a genuine Sony KSS-213C?
(Yes, I have tried a form on Sony's web.)

TIA,

/Martin (in the marked for a new CD player, I guess)

Trying to repair CD-player, genuine Sony parts??
 

Martin "Schöön" wrote:
I am trying force my temperamental CD player back in line. It
has always had a somewhat troubled personality. It often refused
to play the last few tracks of a few of my CDs. It has come up
with a new trick lately. It refuses to even acknowledge the
existence of certain CDs (they work fine in all other players
I try) and in some cases it ignores certain tracks.

I started by cleaning the mechanics and then the optics hoping
dirt was all that had happened. This didn't help at all.

Next I thought, maybe the laser is loosing power. I read some-
where that it wasn't hard to replace the laser and it didn't
look hard (I am a microwave engineer). A quick Internet search
told me a replacement laser wasn't costly, some 15 euro at
amazon.co.uk including shipping.

The laser is a Sony KSS-213C. What I actually ordered and
received within five working days was a subassembly including
two motors and a steel plate. It is called KSM213CCM. It is
what I find inside my CD player and replacing it is easy
enough.

But the unit I received was dead on arrival. It had taken a
knock or two on the way and the skimpy packaging had not
protected it. Apart from loose plastic parts it also contained
a dead laser. I use an old digital camera as an IR detector.
The old laser is easily detected and shows up on the display.
The new laser emitted no useful light. I sent it back and the
vendor sent a new unit that got lost on the way.

Now I have received a third unit and it is not dented but
still it does not work. It does not spin its disc motor when
I insert a CD. I have replaced the new laser so I have the new
sub assembly with the old laser and now it works. Nothing wrong
with motors in other words.

I also notice the new laser (if it indeed is a laser) emits
light visible to my unaided eyes. It actually flashes three
times after I close the CD tray. And then nothing happens.
The old laser emits steady IR.

Shouldn't CD lasers emit IR light?
How do I check if the new laser is a genuine Sony KSS-213C?
(Yes, I have tried a form on Sony's web.)

**Have you removed the static protection link?


--
Trevor Wilson
www.rageaudio.com.au

Trying to repair CD-player, genuine Sony parts??
 

"Trevor Wilson" writes:


**Have you removed the static protection link?

Apart from the packaging I have seen no extra parts on
the new device so unless it is hidden inside somewhere
there is no static protection link. But then I have to
admit that English is not my first language and I might
have guessed wrong at what you mean by static protection
link. My guess is it is something to protect the laser
unit from electrostatic discharge. The only such protection
I have found is warning text on the box and slight blue
tint to the plastic the laser unit was wrapped in.
(Yes I have used wrist band and anti-static mat.)

Recent development: I have revisited the possibility
that adjustment is needed rather than replacement. This
time around I have some luck with this. I can make the
player recognize disks it has rejected lately but in at
least one case it still refuses to play all tracks. I
have no service manual so I am 'driving by the back of
my pants' right now.

/Martin

Trying to repair CD-player, genuine Sony parts??
 

Martin "Schöön" wrote:
"Trevor Wilson" writes:


**Have you removed the static protection link?

Apart from the packaging I have seen no extra parts on
the new device so unless it is hidden inside somewhere
there is no static protection link. But then I have to
admit that English is not my first language and I might
have guessed wrong at what you mean by static protection
link. My guess is it is something to protect the laser
unit from electrostatic discharge. The only such protection
I have found is warning text on the box and slight blue
tint to the plastic the laser unit was wrapped in.
(Yes I have used wrist band and anti-static mat.)

Recent development: I have revisited the possibility
that adjustment is needed rather than replacement. This
time around I have some luck with this. I can make the
player recognize disks it has rejected lately but in at
least one case it still refuses to play all tracks. I
have no service manual so I am 'driving by the back of
my pants' right now.

**Examine the two circuit boards (new laser and old laser) VERY carefully.
You will probably see a solder blob linking two tracks on the new laser
which is not present on the old laser. The solder blob must be removed for
correct operation.

This may help:

http://www.monacor.de/de/FLE/KSS213C.pdf

--
Trevor Wilson
www.rageaudio.com.au

Trying to repair CD-player, genuine Sony parts??
 

"Trevor Wilson" writes:

**Examine the two circuit boards (new laser and old laser) VERY carefully.
You will probably see a solder blob linking two tracks on the new laser
which is not present on the old laser. The solder blob must be removed for
correct operation.

This may help:

http://www.monacor.de/de/FLE/KSS213C.pdf

That did indeed help. It would have taken me ages to even think of
such a possibility. The player seems ("seems" because I have not put
it through its paces yet) to work now.

Thanks a ton,

/Martin

Trying to repair CD-player, genuine Sony parts??
 

Martin "Schöön" wrote:
"Trevor Wilson" writes:

**Examine the two circuit boards (new laser and old laser) VERY
carefully. You will probably see a solder blob linking two tracks on
the new laser which is not present on the old laser. The solder blob
must be removed for correct operation.

This may help:

http://www.monacor.de/de/FLE/KSS213C.pdf

That did indeed help. It would have taken me ages to even think of
such a possibility. The player seems ("seems" because I have not put
it through its paces yet) to work now.

Thanks a ton,

**That would be Tonne (a pitifully insignificant proportion of the planet's
population still clings to the term 'Ton') and, no problems.


--
Trevor Wilson
www.rageaudio.com.au

Trying to repair CD-player, genuine Sony parts??
 

"Trevor Wilson" writes:

Martin "Schöön" wrote:
"Trevor Wilson" writes:

**Examine the two circuit boards (new laser and old laser) VERY
carefully. You will probably see a solder blob linking two tracks on
the new laser which is not present on the old laser. The solder blob
must be removed for correct operation.

This may help:

http://www.monacor.de/de/FLE/KSS213C.pdf

That did indeed help. It would have taken me ages to even think of
such a possibility. The player seems ("seems" because I have not put
it through its paces yet) to work now.

Thanks a ton,

**That would be Tonne (a pitifully insignificant proportion of the planet's
population still clings to the term 'Ton') and, no problems.


The player played every CD I threw at it yesterday evening so now I
think it really works.

One more question though. Earlier on I tried adjusting the only
potentiometer I could see and if that is the laser intensity adjustment
I may have cranked it up which may be harmful. Any advice on how to
adjust it? I tried, I think, to return the potentiometer to its
original position but I am not sure.

/Martin

Trying to repair CD-player, genuine Sony parts??
 

Martin "Schöön" wrote:
"Trevor Wilson" writes:

Martin "Schöön" wrote:
"Trevor Wilson" writes:

**Examine the two circuit boards (new laser and old laser) VERY
carefully. You will probably see a solder blob linking two tracks
on the new laser which is not present on the old laser. The solder
blob must be removed for correct operation.

This may help:

http://www.monacor.de/de/FLE/KSS213C.pdf

That did indeed help. It would have taken me ages to even think of
such a possibility. The player seems ("seems" because I have not put
it through its paces yet) to work now.

Thanks a ton,

**That would be Tonne (a pitifully insignificant proportion of the
planet's population still clings to the term 'Ton') and, no problems.


The player played every CD I threw at it yesterday evening so now I
think it really works.

One more question though. Earlier on I tried adjusting the only
potentiometer I could see and if that is the laser intensity
adjustment I may have cranked it up which may be harmful. Any advice
on how to adjust it? I tried, I think, to return the potentiometer to
its original position but I am not sure.

**Unless you have a service manual which includes this adjustment (very rare
nowadays), and/or a laser power meter, you should never attempt to adjust.
So, no advice. Sorry.


--
Trevor Wilson
www.rageaudio.com.au

Trying to repair CD-player, genuine Sony parts??
 

In article , Trevor Wilson
wrote:
Martin "Schöön" wrote:
"Trevor Wilson" writes:


One more question though. Earlier on I tried adjusting the only
potentiometer I could see and if that is the laser intensity
adjustment I may have cranked it up which may be harmful. Any advice
on how to adjust it? I tried, I think, to return the potentiometer to
its original position but I am not sure.

**Unless you have a service manual which includes this adjustment (very
rare nowadays), and/or a laser power meter, you should never attempt to
adjust. So, no advice. Sorry.

I don't know if this will help with commercial laser diodes, but...

When testing exerimental devices one of the standard tricks is to monitor
the voltage and current as you slowly wind up the applied voltage via a
resistor. The curves often have a knee or jump in them at the point where
coherent lasing starts (this is above the current where they light up). If
you find this you can then set the bias just about the knee, and if the
system works, leave it there. This will give you the minimim needed for
lasing, so if it plays discs OK minimises the dissipation and should
maximise life, etc.

I've used this with other types of diode. But I've never repaired or
experimented with commercial optical drives. So don't know their
characteristics.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
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