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<blockquote data-quote="ralphmagno" data-source="post: 577751" data-attributes="member: 189146"><p>hi,</p><p>i have repaired a few afn decoders and most have power supply problems.</p><p>downloaded a ckt diagram form the internet and fixed about 10 of there here in naples.</p><p>only one took a lighting strike and was not fixable.</p><p>if the box is making a high pitch sound and voltages are low</p><p>problem is c9 47 uf cap.</p><p>here is the voltages</p><p>on the power supply colored wires</p><p>white plus 14/19v</p><p>orange plus 30v</p><p>black ground</p><p>red plus 5 v</p><p>blue plus 12</p><p>yellow minus 12v</p><p>if these are all low than c9 could be the problem</p><p></p><p>the big cap c2 holds a 315vdc on it and will knock you down.</p><p>this is for the d9234 power diagram.</p><p>if you need the diagram i can get it again and send it</p><p>have a good day</p><p>ralph<img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="ralphmagno, post: 577751, member: 189146"] hi, i have repaired a few afn decoders and most have power supply problems. downloaded a ckt diagram form the internet and fixed about 10 of there here in naples. only one took a lighting strike and was not fixable. if the box is making a high pitch sound and voltages are low problem is c9 47 uf cap. here is the voltages on the power supply colored wires white plus 14/19v orange plus 30v black ground red plus 5 v blue plus 12 yellow minus 12v if these are all low than c9 could be the problem the big cap c2 holds a 315vdc on it and will knock you down. this is for the d9234 power diagram. if you need the diagram i can get it again and send it have a good day ralph:) [/QUOTE]
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