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 Post subject: [CLD-97] Laser pickup problem (SOLVED!)
PostPosted: 20 Oct 2021, 07:09 
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A few days ago, I opened up my CLD-97 to clean the lens because I was having severe playback issues (staticky audio playing laserdiscs, CDs almost never playing at all). I gently wiped it off with a q-tip, and it worked fine again, for a few minutes. Then CDs started skipping and LDs started having bad tracking problems.

Now, it just makes this constant noise any time the player is turned on. I opened it up to see what was going on, and the laser pickup assembly keeps moving up and down (tilting) non stop:



Does anyone know why this might be happening, and what I could do to fix it?


Last edited by adimifus on 28 Oct 2021, 07:07, edited 1 time in total. _________________
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 20 Oct 2021, 15:31 
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For lens cleaning you need a chamois swab and 91% or greater isopropyl, and only clean it if visibly dirty.

That being said, does moving ribbon cable at any point change this behavior?
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 20 Oct 2021, 16:56 
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cplusplus wrote:
For lens cleaning you need a chamois swab and 91% or greater isopropyl, and only clean it if visibly dirty.

That being said, does moving ribbon cable at any point change this behavior?


It was visibly very dirty-- It definitely needed to be cleaned.

This problem started gradually and intermittently before eventually just doing it all the time.

What do you mean by "moving the ribbon cable"? Poking at it or gently nudging it doesn't seem to change anything.
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 21 Oct 2021, 01:17 
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adimifus wrote:
What do you mean by "moving the ribbon cable"?

Poking/nudging. Cables are known to go bad.

Someone posted this long ago:
https://alt.video.laserdisc.narkive.com ... top-moving
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 21 Oct 2021, 02:58 
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cplusplus wrote:
Poking/nudging. Cables are known to go bad.

Someone posted this long ago:
https://alt.video.laserdisc.narkive.com ... top-moving

Thanks for the link. That seems like exactly what's happening to me, except that the laser itself still seems to work fine (it will still play discs, but it cuts in and out in time with the tilting).
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 21 Oct 2021, 03:32 
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Trying to remember how I fixed this before, memory starts to go when your in your 60's. I believe the op amp that drives the tilt motor on the main board went bad and I had to replace it.
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 21 Oct 2021, 04:38 
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Thanks for sharing that Kurtis. Definitely a weird failure.

I think that would be IC804 (LA6510) in FTS section of main board in the attached image. Tilt error comes in to it on pin 7, and tilt motor out of pin 9.
Attachment:
CLD-97_TiltDrive.jpg
CLD-97_TiltDrive.jpg [ 30.99 KiB | Viewed 2347 times ]
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 21 Oct 2021, 05:29 
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Thank you! I'll try replacing that chip.
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 26 Oct 2021, 03:08 
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Replacing the LA6510 chip fixed the problem! Thanks for all the help! :clap: :thumbup:
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 Post subject: Re: [CLD-97] Laser pickup problem
PostPosted: 26 Oct 2021, 04:11 
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Cheers to Kurtis. His memory seems fine!
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 Post subject: Re: [CLD-97] Laser pickup problem  Topic is solved
PostPosted: 26 Oct 2021, 22:25 
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Good to see my memory hasn't totally failed. Three more years to retirement and then the time to really spend on player repair. Hopefully I'll make it.
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