Question about Sony CDP-CE375 5-Disc CD Changer

1 Answer

Setting up new CD laser

I have numerous single, twin and multidisc cd players that are traded in (I install PA systems) I can swap either the optical unit or the whole sleds quite easily, and all the units will work, but if I fit a new optical unit or a complete sled (ie KSM-213CCM) they don't work. I can't see anything obvious with the new parts that would prevent this, also assuming voltage to laser pot is pre-set at factory. Tried increasing one pot by a tiny turn but still not working. I have a Sony CDP-CE375 to fix and two Numark twin DJ cd players, all using KSS213C. On box with laser only it says 'Remove Antistatic lock before use, but when compared with original unit I can't seem to find a lock!!!
Sometimes cleaning lens works, but only for short time depending on the customers environment.

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  • cablemanuk Oct 10, 2008

    Thanks so much for the advise, I knew it must be something that simple!! I used braid. Why do they that, is that a way to keep static from the lens pcb?
    Once again thanks for superb advise, my customers will benefit greatly from this!


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Any new laser will not require any adjustment, most modern CD players do a self calibration on power up. There is a small dot of solder that must be removed somewhere on the circuit board. You'll see it's shaped like two half circles with a small gap between them which is bridged by solder. Remove this and you should be good to go! You should just be able to touch a soldering iron to it and drag it off. Or you can use a "solder ******" or de-soldering braid.

Posted on Oct 09, 2008

  • Inno Laur Oct 10, 2008

    I think it prevents static from destroying the IC that's mounted to the board, not too sure.

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