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Echostar AD3000IP repair required
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<blockquote data-quote="Llew" data-source="post: 734093" data-attributes="member: 175007"><p>Harper's power supply problem was a familiar one. The electrolytic capacitors causing the fault (C16,C17 smoothing the +5V output) had developed a high ESR reading due to ageing. Using an ESR meter in-circuit swiftly localised the problem. A complete replacement of all electrolytics in an old (dead) power supply is usually necessary if no ESR meter is to hand, but I checked all of the other ones, and they were reading OK.</p><p></p><p>To be on the safe side, I replaced C12 which is too near the primary circuit heat sink and stood the new one proud of the board.</p></blockquote><p></p>
[QUOTE="Llew, post: 734093, member: 175007"] Harper's power supply problem was a familiar one. The electrolytic capacitors causing the fault (C16,C17 smoothing the +5V output) had developed a high ESR reading due to ageing. Using an ESR meter in-circuit swiftly localised the problem. A complete replacement of all electrolytics in an old (dead) power supply is usually necessary if no ESR meter is to hand, but I checked all of the other ones, and they were reading OK. To be on the safe side, I replaced C12 which is too near the primary circuit heat sink and stood the new one proud of the board. [/QUOTE]
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Echostar AD3000IP repair required
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