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Echostar sr8700 power supply schematic
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<blockquote data-quote="Captain Jack" data-source="post: 1103753" data-attributes="member: 243342"><p>It's broken again. The more I look at it, the more I think it's nothing to do with the PSU. Indeed, all the voltages look OK and all ICs are getting the power they need. </p><p></p><p>However, nothing is lighting up on the front panel - or occasionally I get some odd characters. </p><p></p><p>[ATTACH=full]134200[/ATTACH]</p><p></p><p>If I disconnect the MAC board, I will get snow on screen from both TV and decoders SCARTs but nothing more. </p><p></p><p>I keep thinking that it may be to do with either a corrupt EPROM or some fault in CPU? It was always a bit temperamental with sometimes not turning on (or at least the display staying blank).</p><p></p><p>Any thoughts? </p><p></p><p>If anyone has a scrap LT8700 lying around - motherboard mostly - it might be handy to get this revived.</p></blockquote><p></p>
[QUOTE="Captain Jack, post: 1103753, member: 243342"] It's broken again. The more I look at it, the more I think it's nothing to do with the PSU. Indeed, all the voltages look OK and all ICs are getting the power they need. However, nothing is lighting up on the front panel - or occasionally I get some odd characters. [ATTACH type="full"]134200[/ATTACH] If I disconnect the MAC board, I will get snow on screen from both TV and decoders SCARTs but nothing more. I keep thinking that it may be to do with either a corrupt EPROM or some fault in CPU? It was always a bit temperamental with sometimes not turning on (or at least the display staying blank). Any thoughts? If anyone has a scrap LT8700 lying around - motherboard mostly - it might be handy to get this revived. [/QUOTE]
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