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RCA R56WH78 Pincusion

Discussion in 'Troubleshooting and Repair' started by Ericj9050, Sep 8, 2009.

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  1. Ericj9050

    Ericj9050

    1
    0
    Sep 8, 2009
    I am working on this RCA 56 inch projection TV that has a pincusion look
    has anyone had the same problem with this tv?
    And starts up with the 3 color lines at the top of the screen.
    anyone had the same problem with this model?
    Eric.
     
  2. tvtek

    tvtek

    11
    0
    Sep 14, 2009
    Depends on the model and chassis version of the RCA you have. The most common failure on recent projections from RCA were the use of non-leaded solder on the high voltage transformer causing intermittent voltage drops which then caused little pico fuses in the convergence circuit to open. To fix these sets properly you need to remove all of the non-leaded solder from all the pins of the high voltage transformer and then resoler with 60/40 solder. Then you will need to check the pico fuses that are near the transformer with an ohm meter to see which one opened.
     
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