Hello.

I would like to apply a CD pick up head for another use. So I have
made the 'autopsy' of an old CD unit and now I have on my table the
pick-up laser head with its laser, lens, etc.

This head have ten pins on one side. The problem is that I do not know
their functions. It is possible to get one of this pick-ups with its
technical specifications?

Thank you.

This would be from the manufacture only, if they would give out this
type of information, without you being a manufacture contractor for
them.

Generally, and very basically speaking, I know that a few of the pins
are for the power. There are a number of them for the data I/O, and a
few for the bias drive and or bias reference drive for the laser.

If you were to purchase or get a copy of the service manual for the
player it came out of, you may be able to decipher the pins
configuration, but they may not give any more details than what is
required to troubleshoot and do the alignment of the player.

--

Jerry G.
======

"Carlos Soria" wrote in message
om...
Hello.

I would like to apply a CD pick up head for another use. So I have
made the 'autopsy' of an old CD unit and now I have on my table the
pick-up laser head with its laser, lens, etc.

This head have ten pins on one side. The problem is that I do not know
their functions. It is possible to get one of this pick-ups with its
technical specifications?

Thank you.

"Jerry G." writes:

This would be from the manufacture only, if they would give out this
type of information, without you being a manufacture contractor for
them.

Generally, and very basically speaking, I know that a few of the pins
are for the power. There are a number of them for the data I/O, and a
few for the bias drive and or bias reference drive for the laser.

If you were to purchase or get a copy of the service manual for the
player it came out of, you may be able to decipher the pins
configuration, but they may not give any more details than what is
required to troubleshoot and do the alignment of the player.

You could probably figure this out on the older pickups with separate
laser diode and photodiode array, and the focus and tracking coils.

But on the new ones with a single integrated hybrid circuit having
the laser and photodiodes in a single package, it is more difficult.

However, some of these are standary parts for which datasheets exist on
the Web.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header is ignored.
To contact me, please use the feedback form on the S.E.R FAQ Web sites.

Any clues about how to find those 'standary parts'?

Thank you.

Sam Goldwasser wrote in message ...
"Jerry G." writes:

This would be from the manufacture only, if they would give out this
type of information, without you being a manufacture contractor for
them.

Generally, and very basically speaking, I know that a few of the pins
are for the power. There are a number of them for the data I/O, and a
few for the bias drive and or bias reference drive for the laser.

If you were to purchase or get a copy of the service manual for the
player it came out of, you may be able to decipher the pins
configuration, but they may not give any more details than what is
required to troubleshoot and do the alignment of the player.

You could probably figure this out on the older pickups with separate
laser diode and photodiode array, and the focus and tracking coils.

But on the new ones with a single integrated hybrid circuit having
the laser and photodiodes in a single package, it is more difficult.

However, some of these are standary parts for which datasheets exist on
the Web.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header is ignored.
To contact me, please use the feedback form on the S.E.R FAQ Web sites.

(Carlos Soria) writes:

Any clues about how to find those 'standary parts'?

Not specifically but if you search the major manufacturers of laser
diodes like Hitachi, Sony, Mitsubishi, etc., they may have datasheets
on their Web sites or available by asking.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header is ignored.
To contact me, please use the feedback form on the S.E.R FAQ Web sites.



Thank you.

Sam Goldwasser wrote in message ...
"Jerry G." writes:

This would be from the manufacture only, if they would give out this
type of information, without you being a manufacture contractor for
them.

Generally, and very basically speaking, I know that a few of the pins
are for the power. There are a number of them for the data I/O, and a
few for the bias drive and or bias reference drive for the laser.

If you were to purchase or get a copy of the service manual for the
player it came out of, you may be able to decipher the pins
configuration, but they may not give any more details than what is
required to troubleshoot and do the alignment of the player.

You could probably figure this out on the older pickups with separate
laser diode and photodiode array, and the focus and tracking coils.

But on the new ones with a single integrated hybrid circuit having
the laser and photodiodes in a single package, it is more difficult.

However, some of these are standary parts for which datasheets exist on
the Web.