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Standby B + too high on a GE 27" T.V.

Discussion in 'Electronic Repair' started by Dani, Jun 26, 2006.

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  1. Dani

    Dani Guest

    Model # 27GT616 Chassis # CTC 185 AB3. Unit was dead, horizontal output
    BUH517 shorted, Q 114 PWM regulator was shorted, Q 4116 in PWM open
    totally, now the standby B+ to the horizontal is + 165 volts DC, it's
    about
    + 130 volts while running, & all seems ok. Isn't this too high while in
    standby?
    Thanks, Dani.
     
  2. on1aag

    on1aag Guest

    Dani schreef:

    Hi Dani,

    When a pwm regulator is not loaded, the output voltage will rise.
    There is nothing unusual about that, but... you should check if the
    output voltage
    of the pwm regulator is not higher than the working voltage of the
    electrolytic capacitor
    at the output of the regulator. If it is too high you should check if
    the bleeder resistor
    across the capacitor is not open circuit.

    on1aag.
     
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