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Tech Head - The Technology Section
The Work Bench and Soldering Station
Old dig. EchostarDSB1000Ci2 ... absolutely dead?
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<blockquote data-quote="Llew" data-source="post: 129487" data-attributes="member: 175007"><p>Hi nopfusch, and welcome to the forum.</p><p></p><p>Are you absolutely certain that the fault lies in the voltage feed to the LNB supply?</p><p>A fault on any of the other supplies may be shutting down the SMPS.</p><p></p><p>You say the +5V supply to the clock is OK, by this do you mean it is supplied seperately from the SMPS? I would have thought that it comes from the main 5V supply, in which case the SMPS hasn't shut completely down, just 'idling' in standby mode, maybe because of an overload on the SMPS caused by the fault on one of the voltage lines, maybe one of the electrolytics hanging on these supplies.</p><p></p><p>Check all these capacitors by replacement - they're usually the first to investigate in a suspect power supply.</p><p></p><p>Don't have the circuit diagram, so the above is just conjecture.</p><p></p><p>Llew</p></blockquote><p></p>
[QUOTE="Llew, post: 129487, member: 175007"] Hi nopfusch, and welcome to the forum. Are you absolutely certain that the fault lies in the voltage feed to the LNB supply? A fault on any of the other supplies may be shutting down the SMPS. You say the +5V supply to the clock is OK, by this do you mean it is supplied seperately from the SMPS? I would have thought that it comes from the main 5V supply, in which case the SMPS hasn't shut completely down, just 'idling' in standby mode, maybe because of an overload on the SMPS caused by the fault on one of the voltage lines, maybe one of the electrolytics hanging on these supplies. Check all these capacitors by replacement - they're usually the first to investigate in a suspect power supply. Don't have the circuit diagram, so the above is just conjecture. Llew [/QUOTE]
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Tech Head - The Technology Section
The Work Bench and Soldering Station
Old dig. EchostarDSB1000Ci2 ... absolutely dead?
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