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Satellite PC Card Receivers, Internet by Satellite
TBS-6983 pc card repair
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<blockquote data-quote="Terryl" data-source="post: 1139661" data-attributes="member: 369937"><p>What I think what happened is the user (not satesco) used a 75 ohm terminator cap on an unused but active LNB input, this input has a DC voltage on it to run an LNB, a 75 ohm terminator is not a true 75 ohm inductive load but just a 75 ohm resistor, and should never be used on an active circuit with DC power on it.</p><p></p><p>This caused a DC current overload and fried the power supply input pins going down to the PC's motherboard, I'm surprised that the motherboard didn't have some damage.</p><p></p><p>The 75 ohm 1/4 watt resistor used in the cap with a minimum DC voltage of 13 volts applied to it would have an overload of almost 2.2 watts, it would get very hot, and in the long run melt the center insulator on that "F" connector.</p></blockquote><p></p>
[QUOTE="Terryl, post: 1139661, member: 369937"] What I think what happened is the user (not satesco) used a 75 ohm terminator cap on an unused but active LNB input, this input has a DC voltage on it to run an LNB, a 75 ohm terminator is not a true 75 ohm inductive load but just a 75 ohm resistor, and should never be used on an active circuit with DC power on it. This caused a DC current overload and fried the power supply input pins going down to the PC's motherboard, I'm surprised that the motherboard didn't have some damage. The 75 ohm 1/4 watt resistor used in the cap with a minimum DC voltage of 13 volts applied to it would have an overload of almost 2.2 watts, it would get very hot, and in the long run melt the center insulator on that "F" connector. [/QUOTE]
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TBS-6983 pc card repair
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