Looking for the Sony CD player CDP-102 service manual

[Bricolo]

Hi all

A friend gave me one of it's old cd players: a sony CDP-102 (1984)

The player isn't working (yet), it turns on, the tray opens
when I put a cd in it, it's able to display total lengh and number of tracks

but when I press play, it keeps scanning...


Any help?

[Netlist]

Originally posted by Bricolo
Hi all

but when I press play, it keeps scanning...


Any help?

Bricolo,
Clean the lens.

If that doesn't help, You probably end up replacing it. (X49082031)

When I look in my database, it says the laser unit is utterly expensive. (About the value of what you can spend on a new cd-player!!!)

But, I admit my database isn't always correct.
Maybe someone else can answer that question about the cost of the unit.

There's also a flat cable that connect the laser unit with the PCB.
Could be the cause of your problem.
Try this: Insert a cd, and immediately push the forward button (>>) a few times, to select the fifth or sixth number on the disc.

Try to look at the RF signal if you manage to make the unit play.
You have a scope?

/Hugo - didn't know Sony lasers could be that expensive!

[Bricolo]

Thanks for your answear, Netlist


are the symptoms caracteristics to a bad lens? (it can still detect the cd, and tell how much tracks it has)


another strange thing on the player is this

http://www.diyaudio.com/forums/showt...799#post136799

I thought it could be the problem, but other people don't agree

[Bricolo]

some news:


I tryed (with absolutely no hope it would work) a CDR on it
And it works! a noname CDR, on a 1984 player


but sometimes it has difficulties when i press >>| or |<< , keeps scanning like with a brand new original cd

[Netlist]

Originally posted by Bricolo

I thought it could be the problem, but other people don't agree

The "orange thing" is indeed glue.
Others are correct here.

I wouldn't worry about it for the moment.

Did you try what I suggested in my previous post?
Did you clean the lens?
Do you have a scope?

/Hugo – can’t tell much more for the moment, has to now more about what Bricolo tried so far.

[Bricolo]

I was just affraid it was a leaked cap, because it it the only cap on the whole player that has this orange thing



5 or 6th track don' work better thant 1st one (on an original cd)


I haven't tried to clean the lens (do you have a tutorial for this? I never made this)

And I have no scope :/

[Netlist]

Ok

Our posts crossed each other.

Cleaning the lens is done with a little cotton stick.
Nothing-difficult here.
If that doesn't help:
Try to (very carefully) take the laser unit out.
Take out the axe and clean it.
Clean it very good; with some alcohol or isopropanol...
Remount the unit (careful with the flat cable) and apply a tiny bit of oil on the axe.

/Hugo

[Bricolo]

a dry cotton stick?

can't it put some fibers on the lens?

[Netlist]

Originally posted by Bricolo
a dry cotton stick?

can't it put some fibers on the lens?

First thing to do before cleaning the lens is cleaning your ears with the stick...
Just kidding

Don't worry about fibres. I clean them everyday with the cotton stick. You can wet the stick with a little water (just a little).

/Hugo - First cleans the lens, then his ears..

[Christer]

You can also go to a camerashop and buy one of those soft
brushes with a rubber ball for blowing air that are used to
clean camera lenses. That is nicer to the lens than the cotton
sticks and doesn't leave any fibres. To the contrary you can
blow fibres off the lens with it.

If you use a wet cotton stick, as Hugo suggested, I would not
recommend water, since it may leave stains on the lens. It is
better to use isopropanol. (I cannot guarantee 100% that
isopropanol is always safe to use, but AFAIK it is not harmful
to any type of plastics and I have used it myself on CD lenses.)