Question about Sony LBT-D990 Shelf System

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Sony compact disc receiver LBT-D990

The laser lens is not reading, I change it allready but still has the same troubles. It uses the KSS-213D. I bought it from Sony.

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  • villacom Oct 02, 2008

    Thank welcomejee for answer me but when I install it I unsold laser diode protection allready and still has the troubles( the laser lens is not reading)

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KSS-213D lens has soldered joint to protect laser diode from static voltages damage when it shipped. You need to unsold laser diode protection joint and then try.

Posted on Oct 01, 2008

  • Shahid Electronics
    Shahid Electronics Oct 02, 2008

    Here electronic technical work starts.
    Please confirm S Curve as per below level.



    Please check RF level as per below mention picture at RF Test Point on RF Board.

    Above said wave form can be seen by using Oscilloscope.



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