CD will not spin up

[Apparatus]

Hello,

I have a Sony MHC-610. A few weeks ago, problems began occuring where
only some CDs would work, or they would have to be inserted a few
times before working. Now, no CDs work.

I took apart the unit's cover and here is what I see when I insert a
disc. The laser moves up and down, twice, as if it is trying to focus.
Then NO DISC is displayed. The spin motor never spins the disc.

This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

What is the order of operations when a disc is inserted? Does the
laser first focus, and when it detects a disc, then the disc is spun?
Or is the disc spun, and then the laser tries to focus?

Should I be able to see the laser light? (from the side, I see
nothing, not even a faint glow)

Any suggestions?

Cheers,
Chandler

 

[Li Gangyi]

You should be able to see a little red glow...perhaps ur CD-laser is gone...
"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309201912.61db3cd@posting.google.com...

Hello,

I have a Sony MHC-610. A few weeks ago, problems began occuring where
only some CDs would work, or they would have to be inserted a few
times before working. Now, no CDs work.

I took apart the unit's cover and here is what I see when I insert a
disc. The laser moves up and down, twice, as if it is trying to focus.
Then NO DISC is displayed. The spin motor never spins the disc.

This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

What is the order of operations when a disc is inserted? Does the
laser first focus, and when it detects a disc, then the disc is spun?
Or is the disc spun, and then the laser tries to focus?

Should I be able to see the laser light? (from the side, I see
nothing, not even a faint glow)

Any suggestions?

Cheers,
Chandler

 

[Mark D. Zacharias]

Actually, sled limit switch first, focus, then spin.

Look for a red dot deep inside the lens. Don't forget to try cleaning the
lens on general principles.

These models get so much dust inside them that the innards of the pickup get
contaminated, and a new pickup is needed.


Mark Z.


"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309201912.61db3cd@posting.google.com...

Hello,

I have a Sony MHC-610. A few weeks ago, problems began occuring where
only some CDs would work, or they would have to be inserted a few
times before working. Now, no CDs work.

I took apart the unit's cover and here is what I see when I insert a
disc. The laser moves up and down, twice, as if it is trying to focus.
Then NO DISC is displayed. The spin motor never spins the disc.

This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

What is the order of operations when a disc is inserted? Does the
laser first focus, and when it detects a disc, then the disc is spun?
Or is the disc spun, and then the laser tries to focus?

Should I be able to see the laser light? (from the side, I see
nothing, not even a faint glow)

Any suggestions?

Cheers,
Chandler

 

[Sam Goldwasser]

apparatus.home@lycos.com (Apparatus) writes:

Hello,

I have a Sony MHC-610. A few weeks ago, problems began occuring where
only some CDs would work, or they would have to be inserted a few
times before working. Now, no CDs work.

I took apart the unit's cover and here is what I see when I insert a
disc. The laser moves up and down, twice, as if it is trying to focus.
Then NO DISC is displayed. The spin motor never spins the disc.

Probably isn't focusing properly. First, clean the lens. make sure the
complete sequence is taking place to close the drawer and move the pickup
into position - a belt may be slipping.

This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

What is the order of operations when a disc is inserted? Does the
laser first focus, and when it detects a disc, then the disc is spun?
Or is the disc spun, and then the laser tries to focus?

The order of operation is usually focus, then spin only if focus established.

Should I be able to see the laser light? (from the side, I see
nothing, not even a faint glow)

Just barely and you don't want to be staring too closely into it!

See the CD repair guide at the site below.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.

 

[Apparatus]

Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in message news:<6w1xuatjhs.fsf@saul.cis.upenn.edu>...

Probably isn't focusing properly. First, clean the lens. make sure the
complete sequence is taking place to close the drawer and move the pickup
into position - a belt may be slipping.

I cleaned the lens with a q-tip and rubbing alcohol. I also offset the
pickup to mid-disc, then closed the drawer. I observed the pickup move
to the front, the lens focused twice again. I did see the faint red
glow eminating from the laser. Still the disc does not spin.

This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

Any ideas?

Cheers,
Chandler

 

[Max Harding]

check the tray limit switch first if not closing properly the rest will not
work.
"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309211706.60460f07@posting.google.com...

Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in message
news:<6w1xuatjhs.fsf@saul.cis.upenn.edu>...

Probably isn't focusing properly. First, clean the lens. make sure the
complete sequence is taking place to close the drawer and move the
pickup
into position - a belt may be slipping.

I cleaned the lens with a q-tip and rubbing alcohol. I also offset the
pickup to mid-disc, then closed the drawer. I observed the pickup move
to the front, the lens focused twice again. I did see the faint red
glow eminating from the laser. Still the disc does not spin.


This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

Any ideas?

Cheers,
Chandler

 

[LASERandDVDfan]

I cleaned the lens with a q-tip and rubbing alcohol. I also offset the
pickup to mid-disc, then closed the drawer. I observed the pickup move
to the front, the lens focused twice again. I did see the faint red
glow eminating from the laser. Still the disc does not spin.

Try airblasting the pickup with a can of compressed air. Be warned, though.
Doing this improperly and carelessly will damage the pickup.

Another thing to look for is any severed conductors in the connection ribbon
between the pickup and the mainboard it connects to. This assumes your unit
uses a transmission ribbon instead of wires. - Reinhart

 

[Mark D. Zacharias]

I'd say at this point, the pickup is bad.

Mark Z.


"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309211706.60460f07@posting.google.com...

Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in message
news:<6w1xuatjhs.fsf@saul.cis.upenn.edu>...

Probably isn't focusing properly. First, clean the lens. make sure the
complete sequence is taking place to close the drawer and move the
pickup
into position - a belt may be slipping.

I cleaned the lens with a q-tip and rubbing alcohol. I also offset the
pickup to mid-disc, then closed the drawer. I observed the pickup move
to the front, the lens focused twice again. I did see the faint red
glow eminating from the laser. Still the disc does not spin.


This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

Any ideas?

Cheers,
Chandler

 

[Sam Goldwasser]

apparatus.home@lycos.com (Apparatus) writes:

Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in message news:<6w1xuatjhs.fsf@saul.cis.upenn.edu>...

Probably isn't focusing properly. First, clean the lens. make sure the
complete sequence is taking place to close the drawer and move the pickup
into position - a belt may be slipping.

I cleaned the lens with a q-tip and rubbing alcohol. I also offset the
pickup to mid-disc, then closed the drawer. I observed the pickup move
to the front, the lens focused twice again. I did see the faint red
glow eminating from the laser. Still the disc does not spin.


This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

Probably. Check voltage across the motor when it's trying to focus
and after. I'd guess it's still zero due to lack of focus lock.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.

 

[Sam Goldwasser]

"Max Harding" <maxh10@optusnet.com.au> writes:

check the tray limit switch first if not closing properly the rest will not
work.

He already said it's trying to focus.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.

 

[Apparatus]

laseranddvdfan@aol.com (LASERandDVDfan) wrote in message news:<20030922002829.17956.00000943@mb-m25.aol.com>...

I cleaned the lens with a q-tip and rubbing alcohol. I also offset the
pickup to mid-disc, then closed the drawer. I observed the pickup move
to the front, the lens focused twice again. I did see the faint red
glow eminating from the laser. Still the disc does not spin.

Try airblasting the pickup with a can of compressed air. Be warned, though.
Doing this improperly and carelessly will damage the pickup.

What is the proper way to do this?

Another thing to look for is any severed conductors in the connection ribbon
between the pickup and the mainboard it connects to. This assumes your unit
uses a transmission ribbon instead of wires. - Reinhart

I checked the ribbon with a conductivity tester and it is good.

Cheers,
Chandler

 

[Apparatus]

"Mark D. Zacharias" <mzacharias@nospam.earthlink.net> wrote in message news:<ejAbb.2286$gR1.729@newsread4.news.pas.earthlink.net>...

I'd say at this point, the pickup is bad.

Mark Z.

The pickup is a Sony KSS-390A. I looked up the part and it is
obsolete. The manufacturer that I did find that sells in low
quantities sells one for $80. Is there a newer equivalent pickup that
will work equally well? Or a significantly cheaper source of the
obsolete one?

Cheers,
Chandler

 

[Apparatus]

Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in message news:<6w1xu9nf4v.fsf@saul.cis.upenn.edu>...

This looked to be a problem with the spin motor, but I took apart this
assembly further and applied 2.5 V (the rated voltage for this Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

Probably. Check voltage across the motor when it's trying to focus
and after. I'd guess it's still zero due to lack of focus lock.

Yep, voltage across the motor is always zero (with CD in).

 

[Mark D. Zacharias]

You can use the KSS240A instead, but the cable needs changed as well, since
the cable on yours has a "jag" or physical offset. I''l try to get the cable
part number for you.
The KSS 240 can be had for as litttle as about $35.00 US.

Mark Z.


"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309221236.6f2674e@posting.google.com...

"Mark D. Zacharias" <mzacharias@nospam.earthlink.net> wrote in message
news:<ejAbb.2286$gR1.729@newsread4.news.pas.earthlink.net>...
I'd say at this point, the pickup is bad.

Mark Z.

The pickup is a Sony KSS-390A. I looked up the part and it is
obsolete. The manufacturer that I did find that sells in low
quantities sells one for $80. Is there a newer equivalent pickup that
will work equally well? Or a significantly cheaper source of the
obsolete one?

Cheers,
Chandler

 

[Mike]

sounds like the laser emission is weak

Try this, look on the laser, there should be a small micro-potentiometer.

Turn it incremently until it fires.

Try clockwise, if not clockwise, move counter-clockwise.

but mark the original position.


"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309221249.2080f461@posting.google.com...

Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in message
news:<6w1xu9nf4v.fsf@saul.cis.upenn.edu>...

This looked to be a problem with the spin motor, but I took apart
this
assembly further and applied 2.5 V (the rated voltage for this
Mabuchi
RF-310TA-11400 motor.) The motor seemed okay.

Probably. Check voltage across the motor when it's trying to focus
and after. I'd guess it's still zero due to lack of focus lock.

Yep, voltage across the motor is always zero (with CD in).

 

[Apparatus]

"Mark D. Zacharias" <mzacharias@nospam.earthlink.net> wrote in message news:<qHUbb.206$RW4.57@newsread4.news.pas.earthlink.net>...

You can use the KSS240A instead, but the cable needs changed as well, since
the cable on yours has a "jag" or physical offset. I''l try to get the cable
part number for you.

Can I simply cut out the jag from the current ribbon with an exacto knife?

The KSS 240 can be had for as litttle as about $35.00 US.

Where can I get the KSS-240A for $35.00 US? Is the supplier reliable?

Cheers,
Chandler

 

[Sam Goldwasser]

"Mike" <mbates14@fuse.net> writes:

sounds like the laser emission is weak

Try this, look on the laser, there should be a small micro-potentiometer.

Turn it incremently until it fires.

Try clockwise, if not clockwise, move counter-clockwise.

but mark the original position.

And if a weak laser turns out not to be the problem, you've probably
ruined the laser!

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.

 

[Mark D. Zacharias]

AND the KSS-390 has 3 potentiometers on it, just like the KSS-240.

Mark Z.


"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
news:6wzngv9i8b.fsf@saul.cis.upenn.edu...

"Mike" <mbates14@fuse.net> writes:

sounds like the laser emission is weak

Try this, look on the laser, there should be a small
micro-potentiometer.

Turn it incremently until it fires.

Try clockwise, if not clockwise, move counter-clockwise.

but mark the original position.

And if a weak laser turns out not to be the problem, you've probably
ruined the laser!

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work.
To
contact me, please use the Feedback Form at repairfaq.org. Thanks.

 

[Apparatus]

"Mark D. Zacharias" <mzacharias@nospam.earthlink.net> wrote in message news:<hO5cb.853$NX3.750@newsread3.news.pas.earthlink.net>...

AND the KSS-390 has 3 potentiometers on it, just like the KSS-240.

Why 3? Which one controls what function of the laser? Which one do I need to turn?

sounds like the laser emission is weak

Try this, look on the laser, there should be a small
micro-potentiometer.

Turn it incremently until it fires.

Should I be doing this with the stereo on? Or do you mean until it works?

Try clockwise, if not clockwise, move counter-clockwise.

but mark the original position.

And if a weak laser turns out not to be the problem, you've probably
ruined the laser!

Where can I find more information on this specific procedure?

Cheers,
Chandler

 

[Mark D. Zacharias]

I don't really remember, since they were factory-adjusted, I didn't mess
with them much. Maybe the middle one.
The extra 2 pots is due to the fact that the 390/240 included in the pickup
some circuitry normally found on the main board. This explains why they are
more expensive than, say, a KSS-213, which is otherwise identical.

Mark Z.


"Apparatus" <apparatus.home@lycos.com> wrote in message
news:3360d677.0309240014.56dac39@posting.google.com...

"Mark D. Zacharias" <mzacharias@nospam.earthlink.net> wrote in message
news:<hO5cb.853$NX3.750@newsread3.news.pas.earthlink.net>...
AND the KSS-390 has 3 potentiometers on it, just like the KSS-240.

Why 3? Which one controls what function of the laser? Which one do I need
to turn?

sounds like the laser emission is weak

Try this, look on the laser, there should be a small
micro-potentiometer.

Turn it incremently until it fires.

Should I be doing this with the stereo on? Or do you mean until it works?

Try clockwise, if not clockwise, move counter-clockwise.

but mark the original position.

And if a weak laser turns out not to be the problem, you've probably
ruined the laser!

Where can I find more information on this specific procedure?

Cheers,
Chandler