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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Free moving laser lens CD50

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Beobuddy
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Beobuddy Posted: Sun, Dec 22 2013 1:27 PM

I got in for repair a CD50.

The problem was that it didn't do anything. So I didn't check and started with the basics.

But after removing and cleaning the mechanism from all the old grease, I noticed that the laserlens moves freely up and down. I can touch the lens with my nail and without any resistance it goes up and down.

I haven't noticed that before by any other CD50's.

Is this common? Should I investigate futher by opening the pickup element?

 

Dillen
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Dillen replied on Sun, Dec 22 2013 6:42 PM

The lens is normally fairly free to move when unpowered.
If it can seek out the focus point, it's fine.
Load a CD, press play and look in from the left side to see the lens movement.
If you load a CDR the focus point will be further out and the lens travel likewise and easier to see.

Did you service the spindle motor ?

Martin

Beobuddy
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Beobuddy replied on Mon, Dec 23 2013 6:53 AM

I've taken the black cover from the pickup element and saw that it's contains only a lens with shaft surrounded by a coil.

So after re-assembling all parts I noticed that the spinkle motor was very noisy. So, ended up taking the cd-mchanism (upper part) away again.

After giving the drive shaft 2 drops of WD40, it became much less noisy and set the distance to 4.9mm according to the manual.

Next challenge is the lack of commands taken by the master.

Beobuddy
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Beobuddy replied on Mon, Dec 23 2013 6:54 AM

BTW, Thanks Martin for your suggestion!

Beobuddy
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Utrecht, The Netherlands
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Beobuddy replied on Mon, Dec 23 2013 7:05 AM

Beobuddy:

Next challenge is the lack of commands taken by the master.

Solved. Forgot to plug in the small 2 pins connector at the socket-board at the back.

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