https://archivedforum.beoworld.org:443/forums/42.aspxAdvanced Technical Forum for discussion of Bang & Olufsen products at component level.enCommunityServer 2008 SP2 (Build: 31104.93)https://archivedforum.beoworld.org:443/forums/thread/287939.aspxSun, 01 Aug 2010 14:58:19 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:287939RichC0https://archivedforum.beoworld.org:443/forums/thread/287939.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=287939<p>guess I&#39;m needing a transformer ...</p> <p>I prized apart the two halves of the outer shell with the hope of having all revealed, but not a lot can be seen inside other than a white donut with a few black streaks under the plastic wrapping</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/287913.aspxSun, 01 Aug 2010 09:33:43 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:287913RichC0https://archivedforum.beoworld.org:443/forums/thread/287913.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=287913<p>many thanks , as always Martin. </p> <p>I disconnected everything downstream from transformer I think ...</p> <p>i.e 2 black wires disappear into voltage dial (rectifier?) and come out and feed into 1.6A fuses before entering(transformer?) via numerous waxed red &amp; green cloth covered wires.</p> <p>More wires come out from this transformer &amp; supply tiny PCB.... I disconnected all items from this PCB thinking that is what you had suggested .. I hope I&#39;m right.</p> <p>Anyhow, , as soon as i hit P1 button the 1.6A fuse that feeds the green cloth covered&nbsp; wire going to transformer blew. </p> <p>the other 1.6A fuse is OK</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/287853.aspxSat, 31 Jul 2010 16:00:32 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:287853Dillen0https://archivedforum.beoworld.org:443/forums/thread/287853.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=287853<p>A good place to start would be to isolate the rectifier from the transformer secondary and<br />see if the fuse still blows.<br />If it does - the transformer or power switch is at fault.<br />If not - the rectifier or something drastic&nbsp;around the voltage regulators and/or amplifiers has gone wrong.<br />The capacitors on the regulator module PCB are&nbsp;causing many strange faults. A cap kit is available but<br />check the rectifier/transformer etc. first.</p> <p>Martin</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/287674.aspxSat, 31 Jul 2010 12:10:48 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:287674RichC0https://archivedforum.beoworld.org:443/forums/thread/287674.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=287674<p>where to start? we&#39;ve had a quick look , replaced fuse (which was actually 1A ) above voltage dial with a proper rated 1.6A but that blew straight away</p> <p>what&#39;s the commonest cause&nbsp; for fuses blowing in these pls?</p> <p>&nbsp;would it be the big heavy metal thing in the middle perchance?</p> <p>Rich</p><div style="clear:both;"></div>