Sunday, October 28, 2012

SONY - OPTICAL ASSEMBLY CLEANING PROCEDURE _ REAR PROJECTION TV_ How to clean the optical assembly of Sony PTV.




  • With the optical assembly removed from the set, remove the two screws from the top plastic shield.  
  • Remove 4 screws from the plastic shield, which is below the shield previously removed.
  • The unit will now look like this.
  • Carefully lift up the brown tabs that holds the ribbon cables in place.  With the brown tabs in the 'UP' position remove the ribbon cables by slowly pulling them straight out.  
  • Once the 3 ribbon cables have been removed, remove the prism and lens ass'y.  Remove 8 screws.
  • Carefully hold the lens ass'y by front, and pull slowly making sure to guide the ribbon cables under the plastic bar.
  • With ass'y removed carefully clean off the LCD panels.  This can be done by using filtered air and a very soft brush, if necessary, to remove the dust.  Never touch the LCD panels with your fingers, as this will leave a mark.  Make sure to clean both sides of the panels as well as the opening in which the prism block was removed from.  {DO NOT take this module any farther apart.  DO NOT adjust the screws holding the panels in place or the screws / hex nuts near the lens, as the alignment will be disturbed.}



Carefully re-assemble the optical ass'y and re-install it into TV.  Make sure the LVDS cables are connected to their proper plugs.


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