Question about Philips DIRECTV H20 DTV Receiver

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Directv h20 receiver has low volyage to the lnb.

Voltage at sat in connector is 7.5 volts, but with lnb connected voltage drops to less than one volt. Is there a dropping resistor in that circuit or what may the problem be. no shorts in rf cable. it is ok

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  • Tom Herschlein
    Tom Herschlein Mar 08, 2008

    jaime, where can I download a schematic for H20 Receiver

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Check inside the receiver for a defective LM317 IC or a TIP42C transistor, but before that you should check for proper voltage from the power supply to that IC.
LM317/TIP42C control the switching of voltages that power up the LNB, you should be getting 14 volts for vertical channels and 18 volts for horizontal.
Good Luck.

Posted on Mar 08, 2008

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No voltaje in conector

Posted on Sep 03, 2009

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