https://archivedforum.beoworld.org:443/forums/30.aspxA Forum for Technical Help and Support on Bang & Olufsen products over 25 years old.enCommunityServer 2008 SP2 (Build: 31104.93)https://archivedforum.beoworld.org:443/forums/thread/110101.aspxMon, 28 Apr 2008 02:11:52 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:110101Dillen0https://archivedforum.beoworld.org:443/forums/thread/110101.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=30&PostID=110101<p>The envelope contained the schematics.</p><p>A missing channel could be caused by anything, capacitors, potentiometers, switch contact etc. Put an oscilloscope to the signal path to see where the channel is lost.</p><p>Martin</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/95867.aspxMon, 10 Mar 2008 16:29:25 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:95867Peter0https://archivedforum.beoworld.org:443/forums/thread/95867.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=30&PostID=95867The envelope should contain the circuit diagram. It is not the complete service manual. That is a rather more sizeable document! It is on site for silver and gold members. How useful it is depends a bit on how good you are at electronics! No use to me except that it tells you how to take it apart!<br /><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/95799.aspxMon, 10 Mar 2008 13:10:26 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:95799kaos4racerx0https://archivedforum.beoworld.org:443/forums/thread/95799.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=30&PostID=95799<p>I am looking for a service manual for this unit and some advice (common failures) for the audio issue.</p><p>I have no audio from&nbsp;the left channel, this is my fathers unit and he is the original owner,&nbsp;he has had it serviced once before for a similiar problem, looks like they replaced some resistors (not age correct).&nbsp; Anyways I have taken apart the unit and found the paper envelope attached to this beautiful unit however it is empty.&nbsp; I think that the previous repair shop removed it and anyways the secret papers&nbsp;are missing.&nbsp; Can anyone confirm this was the service manual, or what was in this envelope inside the unit.</p><p>Thanks</p><p>Kris</p><div style="clear:both;"></div>