Clean the Lens, GENTLY, not with Isopropyl Alcohol !!

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Technical and scientific discussion of amps, cables and other topics.

Posted by drlowmu (M) on June 5, 2013 at 22:01:04

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

FIRST off........Clean the lens propely, its bound to need it.

Jeff Medwin

Here is a post I found :

Old 4th February 2013, 09:39 AM #19
Mooly is offline Mooly United Kingdom
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Pleased you found it all useful

First thing has to be to clean the lens. It should look bright and shiny with a bluey tinge under a stong torch light. I know ISO (IPA) seems to get a universal recommend as a cleaner but its something I would never use on optics tbh. In the early days Sony even issued a warning to that affect saying that ISO could damage (the then newly introduced) "coated optics". Camera lens cleaner perhaps or just warm water with a single drop of detergent mixed in.

I doubt whether the sled is sticking tbh but that said you have to consider the possibilty. Monitoring the voltage across the sled motor in playback is a good clue. If it suddenly starts to rise its a good indication the sled has stuck. The voltage will keep rising until the motor overcomes the friction and the sled jerks forward.

Most likely is a faulty pickup. The KSS240 was notorious for giving trouble. A replacement should work straight off and is easy to fit.
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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

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

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