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/143767.aspxWed, 24 Sep 2008 11:14:18 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143767j0hnbarker0https://archivedforum.beoworld.org:443/forums/thread/143767.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143767Ok Martin - one for the &#39;to fix&#39; list I think!<div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/143762.aspxWed, 24 Sep 2008 10:54:33 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143762Dillen0https://archivedforum.beoworld.org:443/forums/thread/143762.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143762<p>Don&#39;t tweak anything unless you are absolutely sure its needed. Trial and error won&#39;t get&nbsp;the tuning&nbsp;correct</p><p>If the supply voltage to the board is correct (battery voltage), there&#39;s really not much you can do without more advanced instruments.</p><p>Maybe it has a blown IF transistor or something like that. Sounds to me like a job for Tim...</p><p>Martin</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/143609.aspxTue, 23 Sep 2008 15:49:30 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143609j0hnbarker0https://archivedforum.beoworld.org:443/forums/thread/143609.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143609<p>Just looking at the board - everything looks ok and intact.</p><p>Could I &#39;untweak&#39; the coils, or does this need to visit a repair shop?&nbsp;</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/143598.aspxTue, 23 Sep 2008 15:26:46 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143598Dillen0https://archivedforum.beoworld.org:443/forums/thread/143598.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143598<p>I suppose we can rule out a power problem then unless the voltage on&nbsp;the main&nbsp;board&nbsp;is off.</p><p>Check the main board for signs of broken tracks, damaged corners&nbsp;etc.</p><p>Maybe someone tweaked the coils ...</p><p>Martin</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/143590.aspxTue, 23 Sep 2008 14:58:10 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143590j0hnbarker0https://archivedforum.beoworld.org:443/forums/thread/143590.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143590<p>Hi Martin</p><p>I&#39;m running this off 5 D cell batteries. There had been a previous leak in the battery compartment that had corroded the negative terminal that slides back and forth. I&#39;ve cleaned it up after a fashion, and the multimeter shows DC current going in to the set.</p><p>Does this shed any light on things?&nbsp;</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/143583.aspxTue, 23 Sep 2008 14:38:01 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143583Dillen0https://archivedforum.beoworld.org:443/forums/thread/143583.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143583<p>If this is a mains powered radio, check the power supply for cracked solders. It&#39;s very common to see, especially at&nbsp;the transistor with the long cooling fin. The power supply is in the metal can,&nbsp;metal lid&nbsp;held by one screw.</p><p>Needless to say; unplug from mains before going in there.</p><p>Martin</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/143578.aspxTue, 23 Sep 2008 14:18:37 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:143578j0hnbarker0https://archivedforum.beoworld.org:443/forums/thread/143578.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=42&PostID=143578<p>Just got hold of a 1970s JJ Beolit 600.</p><p>It has a weird problem in that it powers up, and a feint hiss can be heard on both FM and LW bands. On the MW band there is full volume when the tuning slider is between 1200-1400 (there are no stations I can pick up in this range) and there is very weak volume on all stations either side of the 1200-1400 range.</p><p>Any ideas what&#39;s wrong?</p><p>John&nbsp;</p><div style="clear:both;"></div>