Part needed for Sony CD player

Archived from groups: rec.audio.tech (More info?)

What exactly is the player doing wrong? Often the laser is mis-identified as
the culprit.

Mark Z.


"Bob Harper" <bob.harper@comcast.net> wrote in message
news:SeSbd.186042$wV.32475@attbi_s54...
> Hello.
>
> The laser on my Sony CDP-555ES is dying, and the part (KSS271A) is
> discontinued. Any help from this group in locating a replacement will be
> greatly appreciatecd.
>
> Thank you very much.
>
> Bob Harper

Archived from groups: rec.audio.tech (More info?)

"Bob Harper" wrote
> It skips very easily. My technician has measured the laser's output, and
> says it's a wonder it tracks anything at all.

So replace the entire drive mechanism. If there is something
"magic" about the D/A and analog parts of your CD player,
you can still keep them.

Archived from groups: rec.audio.tech (More info?)

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:10n2lgnaknrsedc@corp.supernews.com...
> "Bob Harper" wrote
>> It skips very easily. My technician has measured the laser's output, and
>> says it's a wonder it tracks anything at all.
>
> So replace the entire drive mechanism. If there is something
> "magic" about the D/A and analog parts of your CD player,
> you can still keep them.
>
What do you think this is, a CD-ROM drive?

The entire mech won't be available, except from a scrapper.

Mark Z.

Archived from groups: rec.audio.tech (More info?)

"Bob Harper" <bob.harper@comcast.net> wrote in message
news:yvacd.257423$D%.185717@attbi_s51...
> Mark D. Zacharias wrote:
>> What exactly is the player doing wrong? Often the laser is mis-identified
>> as the culprit.
>>
>> Mark Z.
>>
>>
>> "Bob Harper" <bob.harper@comcast.net> wrote in message
>> news:SeSbd.186042$wV.32475@attbi_s54...
>>
>>>Hello.
>>>
>>>The laser on my Sony CDP-555ES is dying, and the part (KSS271A) is
>>>discontinued. Any help from this group in locating a replacement will be
>>>greatly appreciatecd.
>>>
>>>Thank you very much.
>>>
>>>Bob Harper
>>
>>
>>
> It skips very easily. My technician has measured the laser's output, and
> says it's a wonder it tracks anything at all.
>
> Bob

Lots of potential reasons for this. Your tech may be great, and comparing to
published Sony literature, or not - I just can't say. If it plays at all,
and the eye pattern isn't too noisy, I would think there's some other
problem. It may be possible if necessary to adjust the laser power, but of
course this must be done correctly or the laser diode itself is likely to be
destroyed.

Mark Z.

Archived from groups: rec.audio.tech (More info?)

"Geoff Wood" <geoff@paf.co.nz-nospam> wrote in message
news:97icd.8188$mZ2.730997@news02.tsnz.net...
>
> "Mark D. Zacharias" <mzacharias@yis.us> wrote in message
> news:2tdh1kF1v6ef8U1@uni-berlin.de...
>>
>> "Geoff Wood" <geoff@paf.co.nz-nospam> wrote in message
>> news:mWfcd.8173$mZ2.729014@news02.tsnz.net...
>>>
>>> "Bob Harper" <bob.harper@comcast.net> wrote in message news:yvacd.257423
>>>
>>>> It skips very easily. My technician has measured the laser's output,
>>>> and says it's a wonder it tracks anything at all.
>>>
>>>
>>> Why doesn't he change the laser diode then ? You don't need to replace
>>> the whole assembly.
>>>
>>>
>>> geoff
>>>
>> One does not replace just the laser diode. Where would you get it anyway?
>> Place a bulk order to Taiwan?
>
> No. Try any comprehensive electronic parts supplier.
>
> geoff
>
Such as? Not MCM, Andrews, or any of the other regular suppliers for audio
repair. Besides, the diode itself is RARELY the problem. The is an APC
circuit in every cd player, and they work quite well. Contamination from
smoke, dust, etc is the number one cause of failure, followed by a bad diode
pack, followed by an open focus or tracking coil.

Mark Z.

Archived from groups: rec.audio.tech (More info?)

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:10n48cqkgn4jd04@corp.supernews.com...
>
> "Mark D. Zacharias" <mzacharias@yis.us> wrote in message
> news:2tdgvqF1ur45oU1@uni-berlin.de...
>>
>> "Richard Crowley" <rcrowley7@xprt.net> wrote in message
>> news:10n2lgnaknrsedc@corp.supernews.com...
>>> "Bob Harper" wrote
>>>> It skips very easily. My technician has measured the laser's output,
>>>> and says it's a wonder it tracks anything at all.
>>>
>>> So replace the entire drive mechanism. If there is something
>>> "magic" about the D/A and analog parts of your CD player,
>>> you can still keep them.
>>>
>> What do you think this is, a CD-ROM drive?
>>
>> The entire mech won't be available, except from a scrapper.
>
> I have seen several mentions online of people converting
> old CD players to independent D/A converters to keep
> them running with newer drives. A few quality moments
> with Google will likely turn up more info than you can
> handle.
>
OK, but there's no evidence the OP is a do-it-your-selfer. Kludging together
some random drive unit with someone else's electronics would be beyond the
capability of most people, to put it charitably.
You'd have to have schematics, of course. Then you'd have to match the
various connections from incompatible connectors. Hopefully the laser APC
circuit is compatible. Hopefully the motor drive voltages are compatible.
Some sled motors run in the 2 volt range. Some run in the 0.8 volt range.
The list of problems, it seems to me, just gets longer the more I consider
the issue.

Mark Z.

Archived from groups: rec.audio.tech (More info?)

"Mark D. Zacharias" <mzacharias@yis.us> wrote in message
news:2tf13dF1ujjajU1@uni-berlin.de...
>
> "Richard Crowley" <rcrowley7@xprt.net> wrote in message
> news:10n48cqkgn4jd04@corp.supernews.com...
>>
>> "Mark D. Zacharias" <mzacharias@yis.us> wrote in message
>> news:2tdgvqF1ur45oU1@uni-berlin.de...
>>>
>>> "Richard Crowley" <rcrowley7@xprt.net> wrote in message
>>> news:10n2lgnaknrsedc@corp.supernews.com...
>>>> "Bob Harper" wrote
>>>>> It skips very easily. My technician has measured the laser's output,
>>>>> and says it's a wonder it tracks anything at all.
>>>>
>>>> So replace the entire drive mechanism. If there is something
>>>> "magic" about the D/A and analog parts of your CD player,
>>>> you can still keep them.
>>>>
>>> What do you think this is, a CD-ROM drive?
>>>
>>> The entire mech won't be available, except from a scrapper.
>>
>> I have seen several mentions online of people converting
>> old CD players to independent D/A converters to keep
>> them running with newer drives. A few quality moments
>> with Google will likely turn up more info than you can
>> handle.
>>
> OK, but there's no evidence the OP is a do-it-your-selfer. Kludging
> together some random drive unit with someone else's electronics would be
> beyond the capability of most people, to put it charitably.
> You'd have to have schematics, of course. Then you'd have to match the
> various connections from incompatible connectors. Hopefully the laser APC
> circuit is compatible. Hopefully the motor drive voltages are compatible.
> Some sled motors run in the 2 volt range. Some run in the 0.8 volt range.
> The list of problems, it seems to me, just gets longer the more I consider
> the issue.

Which nicely summarizes the original concept that trying
to keep an older consumer product (for which replacement
parts are no longer available) running is not a practical thing.

Archived from groups: rec.audio.tech (More info?)

I'd take it if it comes to that.

Mark Z.


"Bob Harper" <bob.harper@comcast.net> wrote in message
news:_Nucd.262592$D%.29968@attbi_s51...
> Mark D. Zacharias wrote:
>> "Richard Crowley" <rcrowley7@xprt.net> wrote in message
>> news:10n48cqkgn4jd04@corp.supernews.com...
>>
>>>"Mark D. Zacharias" <mzacharias@yis.us> wrote in message
>>>news:2tdgvqF1ur45oU1@uni-berlin.de...
>>>
>>>>"Richard Crowley" <rcrowley7@xprt.net> wrote in message
>>>>news:10n2lgnaknrsedc@corp.supernews.com...
>>>>
>>>>>"Bob Harper" wrote
>>>>>
>>>>>>It skips very easily. My technician has measured the laser's output,
>>>>>>and says it's a wonder it tracks anything at all.
>>>>>
>>>>>So replace the entire drive mechanism. If there is something
>>>>>"magic" about the D/A and analog parts of your CD player,
>>>>>you can still keep them.
>>>>>
>>>>
>>>>What do you think this is, a CD-ROM drive?
>>>>
>>>>The entire mech won't be available, except from a scrapper.
>>>
>>>I have seen several mentions online of people converting
>>>old CD players to independent D/A converters to keep
>>>them running with newer drives. A few quality moments
>>>with Google will likely turn up more info than you can
>>>handle.
>>>
>>
>> OK, but there's no evidence the OP is a do-it-your-selfer. Kludging
>> together some random drive unit with someone else's electronics would be
>> beyond the capability of most people, to put it charitably.
>> You'd have to have schematics, of course. Then you'd have to match the
>> various connections from incompatible connectors. Hopefully the laser APC
>> circuit is compatible. Hopefully the motor drive voltages are compatible.
>> Some sled motors run in the 2 volt range. Some run in the 0.8 volt range.
>> The list of problems, it seems to me, just gets longer the more I
>> consider the issue.
>>
>> Mark Z.
> Mr. Zacharias is correct; I am not much of a DIYer, certainly not
> competent to accomplish any of the recommended courses. However, I've
> discovered that the original unit may be available from Europe (I'll find
> out in the next day or two), and should it be that will solve the problem.
> Nonetheless, my thanks for everyone's comments. If it doesn't come about,
> anybody want a dead 555ES for parts or experimentation ?
>
> Bob Harper