Question about Denon AVR-1802 Receiver

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Denon AVR-1802 Hi there, I had a Denon 1802 AV receiver and it went into protection mode a week ago. I went all over the web looking for fixes. All of your posts on problems like this were the most helpful. I was wondering if you could guide me a little. I have taken the unit apart and isolated the faulty IC using a DMM. It is the one closest to the back of the unit and has D2390 stamped on it. On the PCB board the numbers read 2SD2389 and Q101SL. I looked all over for a service manual with no luck but I don't think I'll need it. I was wondering where to go from here... Where to puchase a new IC? I have decent soldering skills and don't think that'll be an issue. Is there anything else to check for? Any help and information is appreciated! Thanks, Mark

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Providing we are talking a standard tall pin Ic ie not a flat surface mounted variety you shouldnt have too much trouble with the soldering as long as you have a steady hand .. remember not to leave the iron on the joint too long or the print will lift and keep the tip clean to aid heat flow to the solder .. here are a couple of web adresses that might help you get the components you require and good luck oh by the way dont forget static precautions , touching an Ic alone without gorunding yourself first with a static strap can blow some sensative ic's http://www.rscomponents.com and http://www.maplins.com also http://www.radioshack.com
hope this helps and again good luck . .... Reagards ..Vortash

Posted on May 02, 2009

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SOURCE: A/V needs new insides... which parts and numbers

First of all the part is a transistor not an IC. There should be at least 4 of these on the back, two of which will be marked D2390. The other should be marked Bxxxx. If the leads of the one you removed read 0 ohms, then it is shorted and must be replaced. You should also replace the 2SB compliment as well.

Before replacing them, completely remove all 4 and mark their locations. Turn on the unit and see if the protection message goes away. Hopefully it will. If it does, carefully measure using the DC voltage setting on the meter the 3 pads for each of the two transistors on the bad side. The readings should be something like 0,+/-40, and +/- 0.6V. If not, please post the readings here and we'll move onto the next step. Otherwise, replace the trnasistors with new ones and you should be OK.

Dan

Posted on Feb 07, 2009

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First of all the part is a transistor not an IC. There should be at least 4 of these on the back, two of which will be marked D2390. The other should be marked Bxxxx. If the leads of the one you removed read 0 ohms, then it is shorted and must be replaced. You should also replace the 2SB compliment as well.

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