non-tracking cd player

hi all,

i've got a sherwood mini system cd/tuner/tape etc deck and the cd player
has stopped working. it's quite old now, but a good unit, so i'd like to
fix it.

it starts to play a cd, and then a few seconds in it gives up and decides that
there isnt a disc. i suspect what might be happening is that the fine tracking
with the magnetic coils is working but the motor drive to do the coarse
either doesnt work or is badly adjusted. i've had it running with the lid off,
and it seems to wiggle the lens assembly, but the whole head doesnt ever move.

the worm drive is free to move, and i greased it up a bit with some silicone
spray, but it didnt fix it. the lens is clean and the few seconds of music that
it does play sounds fine.

theres a trimpot in there (maybe a tuning cap, too hard to see) that i gave the tiniest tweak and stopped it working altogether. when i tweaked it back it
came back to it's usual half broken state.

anyone got any clues? or know someone who'll fix it for a reasonable
price. i like it because it integrates with the whole system, but if it costs
more than $50ish to fix, i'll just buy a new cd player.

thanks in advance,
cory


--
"I'm not the idiot you think I am."
"Oh, which idiot are you then?"

 

[Phil Allison]

"Trevor Wilson" <trevor@rageaudio.com.au> wrote in message
news:3efa6686$1@news.comindico.com.au...

coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bddmrl$o76$1@towncrier.its.monash.edu.au...
hi all,
but if it costs
more than $50ish to fix, i'll just buy a new cd player.

**Yeah, right. 50 bucks. What planet are you from? Buy a new player.

** You can now get a DVD player with the lot for $ 89.00


see http://www.strathfield.com/Product.asp?ProdID=415



............... Phil

 

[Trevor Wilson]

"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:3efa6817$0$5429$afc38c87@news.optusnet.com.au...

"Trevor Wilson" <trevor@rageaudio.com.au> wrote in message
news:3efa6686$1@news.comindico.com.au...

coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bddmrl$o76$1@towncrier.its.monash.edu.au...
hi all,
but if it costs
more than $50ish to fix, i'll just buy a new cd player.

**Yeah, right. 50 bucks. What planet are you from? Buy a new player.



** You can now get a DVD player with the lot for $ 89.00


see http://www.strathfield.com/Product.asp?ProdID=415

**Yeah and that's the "Delux" model. I wonder how much the basic one is?

Makes it pretty hard to justify repairing these things.


--
Trevor Wilson
www.rageaudio.com.au

 

[Tom L]

On Thu, 26 Jun 2003 04:16:33 GMT, "Trevor Wilson"
<trevor@rageaudio.com.au> wrote:

"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:3efa6817$0$5429$afc38c87@news.optusnet.com.au...

"Trevor Wilson" <trevor@rageaudio.com.au> wrote in message
news:3efa6686$1@news.comindico.com.au...

coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bddmrl$o76$1@towncrier.its.monash.edu.au...
hi all,
but if it costs
more than $50ish to fix, i'll just buy a new cd player.

**Yeah, right. 50 bucks. What planet are you from? Buy a new player.



** You can now get a DVD player with the lot for $ 89.00


see http://www.strathfield.com/Product.asp?ProdID=415


**Yeah and that's the "Delux" model. I wonder how much the basic one is?

Makes it pretty hard to justify repairing these things.

I can think of two reasons why it's justified:

1) Employment or

if the above is not economically plausible

2) Reduce reuse recycle = repair

 

[Trevor Wilson]

"Tom L" <void@nowhere.com> wrote in message
news:rtalfvk9gfe2uenv1g8kdgl7lel3r4rf3v@4ax.com...

On Thu, 26 Jun 2003 04:16:33 GMT, "Trevor Wilson"
trevor@rageaudio.com.au> wrote:


"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:3efa6817$0$5429$afc38c87@news.optusnet.com.au...

"Trevor Wilson" <trevor@rageaudio.com.au> wrote in message
news:3efa6686$1@news.comindico.com.au...

coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bddmrl$o76$1@towncrier.its.monash.edu.au...
hi all,
but if it costs
more than $50ish to fix, i'll just buy a new cd player.

**Yeah, right. 50 bucks. What planet are you from? Buy a new player.



** You can now get a DVD player with the lot for $ 89.00


see http://www.strathfield.com/Product.asp?ProdID=415


**Yeah and that's the "Delux" model. I wonder how much the basic one is?

Makes it pretty hard to justify repairing these things.

I can think of two reasons why it's justified:

1) Employment or

if the above is not economically plausible

2) Reduce reuse recycle = repair

**Given that service to audio equipment represents a significant proportion
of my income, it distresses me mightily that many products are no longer
worth servicing. However, we must be realistic about such things. People
will always choose the least expensive option when presented with more than
one.


--
Trevor Wilson
www.rageaudio.com.au

 

[KLR]

On 26 Jun 2003 02:47:17 GMT, coryms+news@azazel.eng.monash.edu.au
wrote:

hi all,

i've got a sherwood mini system cd/tuner/tape etc deck and the cd player
has stopped working. it's quite old now, but a good unit, so i'd like to
fix it.

it starts to play a cd, and then a few seconds in it gives up and decides that
there isnt a disc. i suspect what might be happening is that the fine tracking
with the magnetic coils is working but the motor drive to do the coarse
either doesnt work or is badly adjusted. i've had it running with the lid off,
and it seems to wiggle the lens assembly, but the whole head doesnt ever move.

I recall a similar situation with a pioneer CD player. it would try
to read the CD and then give up without success.

It turned out that the spindle motor was not getting up to speed fast
enough (or wasnt reaching maximum speed at all?) and the processors
"time limit" (or whatever) for the motor to spin up - or to get a
successful TOC read ran out and it stopped the process

checking or replacing the spindle motor might be a good start for this
one

the worm drive is free to move, and i greased it up a bit with some silicone
spray, but it didnt fix it. the lens is clean and the few seconds of music that
it does play sounds fine.

oh no

dont put silicone on there. it seizes up and goes gummy and then the
thing wont work. I learned that the hard way trying some years back
to repair a CD Rom drive,

theres a trimpot in there (maybe a tuning cap, too hard to see) that i gave the tiniest tweak and stopped it working altogether. when i tweaked it back it
came back to it's usual half broken state.

anyone got any clues? or know someone who'll fix it for a reasonable
price. i like it because it integrates with the whole system, but if it costs
more than $50ish to fix, i'll just buy a new cd player.

thanks in advance,
cory

I think that you would be pushing to even get a quote for repair for
$50 ish !

consider the new player. its sure to be cheaper than the repair.

 

[Rudolf Ladyzhenskii]

I suspect a bad laser. The good news, that it is likely to be a cheaper one
(KSS210). Replacing this will cost more than $50, but I think it may be
worth it.

If in Melbourne, call me on 0414 635 468.

Rudolf

<coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bddmrl$o76$1@towncrier.its.monash.edu.au...

hi all,

i've got a sherwood mini system cd/tuner/tape etc deck and the cd player
has stopped working. it's quite old now, but a good unit, so i'd like to
fix it.

it starts to play a cd, and then a few seconds in it gives up and decides
that
there isnt a disc. i suspect what might be happening is that the fine
tracking
with the magnetic coils is working but the motor drive to do the coarse
either doesnt work or is badly adjusted. i've had it running with the lid
off,
and it seems to wiggle the lens assembly, but the whole head doesnt ever
move.

the worm drive is free to move, and i greased it up a bit with some
silicone
spray, but it didnt fix it. the lens is clean and the few seconds of music
that
it does play sounds fine.

theres a trimpot in there (maybe a tuning cap, too hard to see) that i
gave the tiniest tweak and stopped it working altogether. when i tweaked it

back it

came back to it's usual half broken state.

anyone got any clues? or know someone who'll fix it for a reasonable
price. i like it because it integrates with the whole system, but if it
costs
more than $50ish to fix, i'll just buy a new cd player.

thanks in advance,
cory


--
"I'm not the idiot you think I am."
"Oh, which idiot are you then?"

 

[-:Install:-]

Put your finger on the servo drive ic..... hot ?? get this a lot with Sony
equipment. Freeze it up and run the unit again... should run a tad longer.
If it has discrete transistor drive do the same, check them all.

<coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bdg17v$j27$1@towncrier.its.monash.edu.au...

KLR <kreed@bigpond.net.au> wrote:
On 26 Jun 2003 02:47:17 GMT, coryms+news@azazel.eng.monash.edu.au
wrote:

it starts to play a cd, and then a few seconds in it gives up and
decides that
there isnt a disc. i suspect what might be happening is that the fine
tracking
with the magnetic coils is working but the motor drive to do the coarse
either doesnt work or is badly adjusted. i've had it running with the
lid off,
and it seems to wiggle the lens assembly, but the whole head doesnt ever
move.


I recall a similar situation with a pioneer CD player. it would try
to read the CD and then give up without success.

this one is actually _playing_ the first few seconds just fine.

It turned out that the spindle motor was not getting up to speed fast
enough (or wasnt reaching maximum speed at all?) and the processors
"time limit" (or whatever) for the motor to spin up - or to get a
successful TOC read ran out and it stopped the process

it get the TOC. it plays fine and the gives up after perhaps 5-10 seconds.

the worm drive is free to move, and i greased it up a bit with some
silicone
spray, but it didnt fix it. the lens is clean and the few seconds of
music that
it does play sounds fine.

oh no
dont put silicone on there. it seizes up and goes gummy and then the
thing wont work. I learned that the hard way trying some years back
to repair a CD Rom drive,

it's not silicone grease. it's a very thin oil spray and i know it doesnt
glue up. i've used the stuff for years on all sorts of things. plastic
gears,
food processors, tape mechanisms, car door seals etc. it doesnt damage
rubber
or plastic and doesnt go gummy.

I think that you would be pushing to even get a quote for repair for
$50 ish !

i kind of meant that if I could repair it for $50 of parts then i'd do it,
but
i won't rule out getting it repaired if the price is right.

consider the new player. its sure to be cheaper than the repair.

i know, but i like this unit, and all the bits integrate nicely. and i
hate
chucking stuff out.

cheers,
cory

--
"I'm not the idiot you think I am."
"Oh, which idiot are you then?"

 

[Ken Taylor]

<coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bdnt25$iq9$1@towncrier.its.monash.edu.au...

Rudolf Ladyzhenskii <rudolf.ladyzhenskii@removetoreplyadcomtech.net
wrote:

coryms+news@azazel.eng.monash.edu.au> wrote in message
news:bddmrl$o76$1@towncrier.its.monash.edu.au...
it starts to play a cd, and then a few seconds in it gives up and
decides
that
there isnt a disc. i suspect what might be happening is that the fine
tracking
with the magnetic coils is working but the motor drive to do the coarse
either doesnt work or is badly adjusted. i've had it running with the
lid
off,
and it seems to wiggle the lens assembly, but the whole head doesnt
ever
move.

the worm drive is free to move, and i greased it up a bit with some
silicone
spray, but it didnt fix it. the lens is clean and the few seconds of
music
that
it does play sounds fine.

theres a trimpot in there (maybe a tuning cap, too hard to see) that i
gave the tiniest tweak and stopped it working altogether. when i tweaked
it
back it
came back to it's usual half broken state.

I suspect a bad laser. The good news, that it is likely to be a cheaper
one
(KSS210). Replacing this will cost more than $50, but I think it may be
worth it.

I think the laser is ok, but there are some funny symptoms....

when the unit is _off_ (well.... on standby) the laser seems to be turned
on. I can see a dim red light coming out of it. When I turn the unit on, the

laser

turns off until I select the CD function. Then the laser comes on again,
blinks a few times as it tries to find the CD and then turns off.

Why should the laser be ON when the whole unit is OFF?

also, sometimes when it tries to play a disc the spindle will try to spin
up,
almost get up to speed and then turn backwards weakly for a few turns.
like
a three phase motor running off only one phase.

It's a Sherwood CD-77R, by the way.

thanks again,
cory

You aren't *looking* at the laser are you? They aren't joking with the
warnings!

Ken

 

Ken Taylor <ken123@xtra.co.nz> wrote:

It's a Sherwood CD-77R, by the way.

You aren't *looking* at the laser are you? They aren't joking with the
warnings!

no, not directly, but it's pretty easy to see that it's on.

they're not all that dangerous, though. sure, prolonged looking is bas news,
but the beam isn't collimated enough to be at any dangerous intensity by
the time it gets to your eye.

still, i'm not condoning looking right at it.

cheers,
cory

btw: sign in physics lab at melb uni many years ago:

"please do not look into the laser with your remaining eye"

--
"I'm not the idiot you think I am."
"Oh, which idiot are you then?"