After placing a new laser unit (KSS-240A) the cd-palyer will not play any cd's. Putting back the old laser units will let the cd player read the cd and play it, although it skips over the disc from time to time.
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Re: New laserunit won't work
You seem confident enought to take it apart, have you tried cleaning the runners that the laser runs backward and forward on. Some times they collect dirt/dust and the laser can't move smoothly so it jerks and skips.
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Lets give it a try. The purchasedate will be 1991 (HI).
I'll suppose you allready cleaned the laserunit.
You can try to clean the laserslides, sometimes they are sticky and dry. Then the laser is not fast and precise enough to read the index of your CD.
Clean them with some alcohol on cottontips.
When they are really clean, use just a little teflonoil to make sure the laserunit slides very smoothly.
you didn't say which "ES" model of player it is but i assume it has the KSS-240A laser pick-up, or something very similar. i've repaired so many sony cd players i've lost count and 90% of them have been down to the same fault you describe.given the age of the player the most common cause of skipping is hardened grease on the laser sled and the drive gears which causes resistance in laser movement hence the skipping. try clean as much of the old grease off the sled & drive gears as possible and relubricate. i've used a drop of light machine oil in the absence of a light grease which has made lasting repairs. but run only a small drop along the sled taking care not to drop any on the laser itself. if of course you have any light grease then i would use this but not too much. hope this helps?
GG My kids had a PlayStation 2 that did this and so did my AIWA 3 CD player. The solution for the PlayStation was to remove the cover use alcohol and clean the lens of the laser reader. They get dust on them and simply cannot read. The AIWA required replacement of the laser which cost almost as much as the unit and didn't last 6 months.
Try to change the laser unitKSS-240A (opticals). In most cases problem solved. The "zik-zik" sound is made by the motors in the unit as the laser tries to read the CD.
Caution, after installing the new laserunit remove the short circuits on the laserunit itself. This it put there just to protect the laser from static energie faulure during repair.
i would try using different cdr recordable media or try a different burner if this dosent help then i would say your laser is at fault or in some cases i have had the servo pcb going faulty on this model.
hope this helps.