do you know

do you know

Posted by unclestu (D) on February 1, 2013 at 11:09:06

In Reply to: CD Player Laser Deterioration posted by Mushroom Soup on February 1, 2013 at 06:17:11:

what laser mechanism your Denon uses ? I sold Harman Kardon which used a sony laser mechanism and I still have units in the field over 20 years old and still going strong, staill able to read CDR's and such.

One of the major issues with the CD players is that the laser lens is sort of like a camera,it has a difinite focal length. If your mechanism has a magnetic chuck, the constant opening and closing of the drwer nd the resultant slamming down of the clampiong mechanism tends to "hammer" the turntable dowm, and eventually it reaches the limit of the focal length. You will notice this first on the the data on the edges of the disc, where any eccentricities will be amplified.

Since the CD TT is simply friction mounted on the motor shaft, often times a gentle prying upward of the TT will place the surface of the CD back in the proper focal range.

good luck.

Stu

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Follow Ups Full Thread

Topic - CD Player Laser Deterioration - Mushroom Soup 06:17:11 02/01/13 (17)

Clean the Lens, GENTLY, not with Isopropyl Alcohol !! - drlowmu 22:01:04 06/05/13 (0)

Well, it turns out that.... - Mushroom Soup 06:50:08 02/13/13 (1)

It's called "planned obsolescence" - Brian H P 15:07:58 05/27/13 (0)

RE: CD Player Laser Deterioration - 6bq5 13:04:26 02/04/13 (0)

do you know - unclestu 11:09:06 02/01/13 (9)

RE: do you know - Mushroom Soup 05:54:12 02/02/13 (4)

RE: do you know - Blackdog 17:20:08 02/23/13 (0)

The KSS - unclestu 13:23:03 02/02/13 (2)

RE: The KSS - Mushroom Soup 11:30:43 02/08/13 (1)

RE: The KSS - unclestu 12:03:19 02/10/13 (0)

RE: "the laser lens is like a camera and has a definite focal length." Not hardly. Nt - geoffkait 13:52:34 02/01/13 (3)

I guess - unclestu 17:34:12 02/01/13 (2)

I 'll split the difference with you - geoffkait 03:51:27 02/02/13 (1)

The focussing - unclestu 17:30:53 02/02/13 (0)

RE: CD Player Laser Deterioration - geoffkait 07:44:14 02/01/13 (2)

RE: CD Player Laser Deterioration - Mushroom Soup 06:03:52 02/02/13 (1)

RE: CD Player Laser Deterioration - geoffkait 06:08:31 02/02/13 (0)

Follow Ups

do you know - unclestu 11:09:06 02/01/13 (9)

RE: do you know - Mushroom Soup 05:54:12 02/02/13 (4)

RE: do you know - Blackdog 17:20:08 02/23/13 (0)

The KSS - unclestu 13:23:03 02/02/13 (2)

RE: The KSS - Mushroom Soup 11:30:43 02/08/13 (1)

RE: The KSS - unclestu 12:03:19 02/10/13 (0)

RE: "the laser lens is like a camera and has a definite focal length." Not hardly. Nt - geoffkait 13:52:34 02/01/13 (3)

I guess - unclestu 17:34:12 02/01/13 (2)

I 'll split the difference with you - geoffkait 03:51:27 02/02/13 (1)

The focussing - unclestu 17:30:53 02/02/13 (0)

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