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RCA PTK195P3C Convergence Pwr Supply - STK730-130 Questions

Discussion in 'Electronic Repair' started by BobC, Sep 22, 2003.

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  1. BobC

    BobC Guest

    The Convergence Pwr Supply continues to fail.
    I have tried higher rated regulators ... they fail after a few days.

    I noticed that the data sheet for the STK730-130 shows a 'drive circuit'
    between pins 4 & 5, however, even with new ICs this resistance
    measures a short ??? (I am posting a separate question about the
    STK730-130 IC in an effort to resolve this problem).

    I came across another set that has been in the field for two years that
    someone had intentionally shorted the Emitter-Base of Q19700. I am
    wondering if there is a know problem with this regulator circuit and
    someone inhibited Q19700 for a reason ????
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