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[CLD-97] Laser pickup problem (SOLVED!)
https://forum.lddb.com/viewtopic.php?f=53&t=10076
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Author:  adimifus [ 20 Oct 2021, 07:09 ]
Post subject:  [CLD-97] Laser pickup problem (SOLVED!)

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?

Author:  cplusplus [ 20 Oct 2021, 15:31 ]
Post subject:  Re: [CLD-97] Laser pickup problem

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?

Author:  adimifus [ 20 Oct 2021, 16:56 ]
Post subject:  Re: [CLD-97] Laser pickup problem

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.

Author:  cplusplus [ 21 Oct 2021, 01:17 ]
Post subject:  Re: [CLD-97] Laser pickup problem

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

Author:  adimifus [ 21 Oct 2021, 02:58 ]
Post subject:  Re: [CLD-97] Laser pickup problem

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).

Author:  krbahr [ 21 Oct 2021, 03:32 ]
Post subject:  Re: [CLD-97] Laser pickup problem

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.

Author:  cplusplus [ 21 Oct 2021, 04:38 ]
Post subject:  Re: [CLD-97] Laser pickup problem

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 2359 times ]

Author:  adimifus [ 21 Oct 2021, 05:29 ]
Post subject:  Re: [CLD-97] Laser pickup problem

Thank you! I'll try replacing that chip.

Author:  adimifus [ 26 Oct 2021, 03:08 ]
Post subject:  Re: [CLD-97] Laser pickup problem

Replacing the LA6510 chip fixed the problem! Thanks for all the help! :clap: :thumbup:

Author:  cplusplus [ 26 Oct 2021, 04:11 ]
Post subject:  Re: [CLD-97] Laser pickup problem

Cheers to Kurtis. His memory seems fine!

Author:  krbahr [ 26 Oct 2021, 22:25 ]
Post subject:  Re: [CLD-97] Laser pickup problem  Topic is solved

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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