Question about Marantz SR-7200 Receiver
Power transformer and regulator ic gets over heated but works normal
Posted by Anonymous on
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Posted on Jan 02, 2017
All transformers buzz though you cannot hear it normally. The big transformers on power lines like to buzz for all to hear. When a transformer in a stereo amp gets old and deteriorates or gets hot and expands the coils, melts the coil varnish and epoxy coatings then rattles at 60 times per second. You can ignore it or change the transformer. There are too many layers of windings to try to stick anything in there. Disconnecting a transformer results in inductive kickback -that's not money. It's a big, whopping electrical gotcha! Be careful! Good luck, Steve Medley
Posted on Nov 09, 2008
SOURCE: NO POWER - MARANTZ SR-5000
you mite not have to reset it, try checking ur fuses, it could of triped the cicrut when the power went out, normaly thats what happens unless it was a direct contact then, u mite wanna go get a nother receiver, and what i mean by direct contact, i mean like directly pluged into the wall
hope that helps
Posted on Feb 13, 2009
SOURCE: marantz sr7200
Most likley, if I'm right, you have heard some staitcy, crackly noises, accompanied with this failure. If so, the problem is without a doubt on the D.S.P. board, witch is the one with the optical jacks on it, The culprits would then be I.C. 719 & I.C. 720. This is a common problem with this model, and the sr6200 & 5200 as well. A low tech method to confirm this is to touch IC 720 (the smaller one) while it's on. If you can keep your fingertip on it for at least ten seconds, it's ok, and the problem is elsewhere. If not, (IT WILL BE VERY HOT) the the board must be removed (27 screws from left to right) and replace BOTH IC719 & IC720.
Posted on May 27, 2009
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