Question about Denon AVR-1602 Receiver

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Denon AVR-1602 Overheated!

Hello, My Denon AVR-1602 Reciever was powered on high volume about 4-5 hours and it get burning HOT! In one moment it just power-off. I waited to cool down and turned back the power, but the display did not lid. The service diod flshes 4-5 times and then lid constantly, but the display did not lid. There is no sound too. I reset the main cpu by holding Speakers A and B button and power it on but still nothing, then i removed all plugs including the speaker's too but nothing. I opened it up and look around but i did not noticed any visible damage. When it overheated there was no smell of burning element or plastic or else it was just HOT! Do you have any suggestion? Thank you!

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Re: Denon AVR-1602 Overheated!

I have exactly the same problem. I have checked and replaced these resistors but they didn't fix the problem nor were the old ones open circuited anyway, but I have kept with the new ones for now. I have also checked some of the transistors on the larger heat sink and the power regulator transistors on the two small heat sinks, no problem there either.
I guess the next step is the check the power supply and power relay after that I stumped.
Anyone else got anymore ideas?

Posted on Sep 12, 2012

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Re: Denon AVR-1602 Overheated!

Hold on......there are 4 small resistors in the power supply that open up ( no longer work ). This is a VERY COMMON PROBLEM for 01-02-03 model Denons. They are "flameproof" resistors, so when they burn open, there is no trace of a problem, they look normal. This pic is from a 1601 which is almost identical. The resistors are missing from the picture, but you can see where it is marked R 141, R142, R143, R 148.

If your shop measures across these resistors and they are more than 10 ohms, then they are blown, and this is your problem. These should each be replaced with a 1 ohm 1/2 watt Metal Film Flameproof resistor. You must also remember that the little 1602 is NOT a professional unit, designed to be cranked for hours on end. It is a home theatre receiver.

If this solves your problem, be happy and dont beat your receiver to death. .....THIS BEING SAID.....the other reason that these blow is because one or more channels are blown and drawing too much current from the power supply. IF that is the case, be prepared for a big bill. DO NOT try and fix this yourself, as the entire receiver must be taken apart , right down to the bare chassis to get this board out. Leave it for a professional. Have them check the resistors first, it only takes about 10 minutes to get the cover off, check the resistors and put the cover back on........hope this helps... Rob


Posted on Mar 13, 2008

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