https://archivedforum.beoworld.org:443/forums/16.aspxvoor Nederlandstalige gebruikers van BeoWorld, om te communiceren met elkaar over de wereld die Bang & Olufsen heet.enCommunityServer 2008 SP2 (Build: 31104.93)https://archivedforum.beoworld.org:443/forums/thread/286580.aspxMon, 26 Jul 2010 04:03:38 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:286580Mikemaxcel0https://archivedforum.beoworld.org:443/forums/thread/286580.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=16&PostID=286580<p>The problem is caused by a faulty 7915（the measured voltage is -21V instead of -15V) and after replacing the</p> <p>regulator, a dead 9000 comes to live but the output audio signals accompany with unexpected loud annoying cracking distortion sound</p> <p> properly a <span id="result_box" class="short_text"><span>symptom of burn </span></span>fets(Tr102 and Tr202) as the outputs are taken from R156 and R256.</p> <p>The burnt PF5103 fets are difficult to get. </p> <p>&nbsp;</p> <p>And&nbsp; now I needed to tackle the problems of audio dB level display.It seems that the level display is in working order but </p> <p>with normal audio signal input ,the display hardly shown above -20dB! When cracking distortion sound get in,the level meter would shoot</p> <p>to full scale to +5dB.</p> <p>And you can`t find any information given in regarding to the calibration of audio display meter.</p><div style="clear:both;"></div>