Thank you for choosing the AV 40 professional desktop multimedia audio engineers and producers in studios around the world use M-Audio monitors. M audio av40 buzzingm audio av40 headphone amp M-audio studiophile av 40 manually > READ ONLINE If it works I will write again to inform this post.M-audio studiophile av 40 manually > DOWNLOAD This is only a trial method, but since the board ran hot with it in place and ran cool with it out of the cabinet, some variable is causing the destructive heat, and this might be the cause. I am going to check the board for a possible crack from a factory defect, and also use a small sheet of plastic to isolate the speaker magnet from the housing of the power transformer, in the event that it is contacting the speaker and possibly causing some sort of power drain. It ran cool only after I took the amplifier board out. I took the back off of the left speaker and waited and waited to see which capacitors became hot but the board barely became lukewarm even after a few hours of operation. The circuit board layout has been changed from the original layout indicated in this post so identifying the faulty parts would take some independent investigation. Well that was that-now go out and revive some gear by replacing capacitors!Īfter buying a pair of M-audio av40 speakers I found the same high-heat issue with the left speaker. To fix this I applied a small amount of silicon around the case where the screws go so that It would add some space so the the speaker wouldn't short with the heat sink. The problem became worse when I noticed that even without tightening the screws, the short would happen when I would apply pressure to plug in the power cable. Also, the amp heat sink might have been shorting with the speaker when I closed the case and tightened the screws. The only problem I encountered with this fix is that a small circuit board that was glued to the inside of the case detached and I wasn't able to reattach it. I used a solder remover and even though the capacitors were glued, I was able to just pull/tilt them off once the solder had been completely removed. The board shows the charges +/- so this helps when installing the replacements. Panasonic Aluminum Electrolytic Capacitors - Leaded I removed the capactitors and ordered them from as follows: I decided to open up the case and sure enough: I found the capactior were bulging and had a chemical leak at the top. After some googling I found that a few of the capacitors used on these have a tendency to go bad and leak. These little speakers are great! However, I was puzzled as to how exactly they had failed. I was recently given a pair of dead M-Audio AV40 near field monitors.
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