Question about Denon AVR-900 Receiver

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DVR-900 blowing Fuse

The 6.3 A fuse on the power board keeps blowing. Any hints on where I should start to look to solve this problem?

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First check the output transistors for a short, 9 times out of 10 this is the case. Use a multi-meter on resistance. The transistors will have most of the part # on them, usually you just have to add 2S to the front example an "A1519" on the transistor would be a 2SA1519. If one is found to be bad replace it's complement also even if it checks good (unless you have a transistor checker that will check it for leakage). Good Luck.

Posted on Feb 03, 2009

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It would be very dangerous to bypass a fuse. If it keeps blowing, bypassing the fuse will only create lots of internal damage and maybe a fire as well. The fuse is blowing for a reason, the amplifier is not going to somehow start working because you bypassed the fuse. You also need to stop trying to turn it on, every time it blows the fuse, it keeps stressing the components inside. You have a shorted power supply, probably water damage as well since the power wire got wet.

I repair car amplifiers for a living, and can tell you with all honesty that bypassing the fuse would be a terrible mistake to make, the amplifier would end up being un-fixable with holes burned right into the board.

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