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CED Digest Vol. 5 No. 38  •  9/23/2000

Date: Sun, 17 Sep 2000 11:05:40 -0500 (CDT)
From: Dorsey <dorsey>
To: digest@cedmagic.com
Subject: sgt200 problems

I have an sgt200 that skips back to the beginning after playing the first
30-45 seconds of the disc.  at first I thought it was a problem with the
disc I was using, but it does it on every disc I've tried.  I'm thinking
something along the lines of the stylus cartrige getting stuck, but I
don't know enough about the internals to comfirm/fix it.  Any ideas?

--Steven Dorsey

------------------------------------------------------------------------
Date: Sat, 23 Sep 2000 13:34:51 -0800
To: digest@cedmagic.com
From: Tom Howe <ceds@teleport.com>
Subject: Cleaning CED's

My preferred method of cleaning CED's is still to simply play the disc once 
without watching it, which will substantially reduce skipping on discs that 
have never been played or have sat unplayed for many years. I keep an SFT100 
around for this purpose as the F/G stylus cartridge is the most plentiful. 
There was a review article published on CED's in 1981 that commented on the 
improved playback after a couple plays, so this method has worked for a long 
time. RCA was even issued a patent for a stylus cartridge with a multi-pronged 
"rake" attachment that would "play" the disc several times each time the real 
stylus tracked the groove.

Suction can be also used to remove loose dust from the disc surface before and 
after play using the crevice cleaning attachment on an ordinary household 
vacuum cleaner. To do this place the disc on an audio LP turntable, then place 
an inverted coffee mug over the center hub for added weight. The crevice 
cleaning attachment can then be held close to the disc surface as the turntable 
spins to vacuum the disc surface.

Contributors to CED Digest have described methods to chemically clean or treat 
the disc surface. These methods do work, but no one knows for certain their 
long term effects- will discs so treated still be playable 20 years from now?

--Tom