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Posted by Stan on November 10, 2004 at 09:42:04:
In Reply to: ATTENTION UK-BASED SANSUI USERS posted by Gavin Wilks on October 30, 2004 at 06:27:04:
Gavin, before you take your AU-D11II to a shop, look at the procedure described on http://www.classic-audio.com/marantz/mtips.html. The article you want is titled: "Those Pesky Speaker Protection Circuits". The protection relays used by Marantz are quite commonly found in other equipment and my AU-D11II appears to have similar relays under an opaque black cover rather than transparent ones as the Marantz has. I have a 1980 vintage JVC amp that has the same Omron relay box, too. On the AU-D11II, the relays are on a vertically mounted board at the left rear of the unit, and they are not easily accessible without dismantling the rear panel of the amp. Caution is needed to avoid breaking the vinyl arrow connectors that hold things together after the screws are removed. I went through repair shop grief trying to get this problem fixed on my Marantz 2270 until I found this procedure (albeit not particularly well-described on the Marantz site) and did it myself with perfect results. No more channel cut-outs!! What happens is the contacts in the relays develop a patina of corrosion that throws a little resistivity into the contacts, and the at low voltages at the contacts sometimes the corrosion patina causes a channel or both to cut out. Heat seems to exacerbate the behavior. On your machine, in storage for so long, this could be your problem. The relay cover is difficult to remove without breaking. On the Marantz, the cover looks like it can be pried off (and one repair shop made a mess of mine), but If you can squeeze the cover at its base on the ends, it can be pulled off the two catches on the long sides that hold it in place. The Sansui should be the same.
If this doesn't solve the problem, I'd love to buy the unit!
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