Question about Harman Kardon AVR 325 Receiver

5 Answers

No sound from "Front Right" channel

I have checked everything. Speaker is good, speaker wire is good. I also reset AVR but no sound from "Front right". All other channels are fine. What could be wrong?

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  • chris ZAMBROTTA
    chris ZAMBROTTA Jan 22, 2008



    i have av avr700 with similar problem .i
    tried to narrow it down. do u think it is a n icor 1 of the
    processors?Theere is klike 5 processors on the dsp. i think the crystal
    ic is the 1 that does the processing of the sound , i think the sound
    is converted but when it is routed to th e channel ,i thingk there were
    the problem is at. is the re anoth=er ic that doees the routing to the
    channel or is it all in 1?
    also could it be something simpliar like
    a diode or resistor or capistor?im a self taugght gu.i built a car
    alarm in highschool,so i dont know too much.but wouldn't mind taking on
    the challenge of repairing it myself.Also the gain in knowledge from
    doing it is pricelss,please share your wisdom.chriszambrotta@yahoo.com

  • chris ZAMBROTTA
    chris ZAMBROTTA Jan 22, 2008



    i have av avr7000 with similar problem .i
    tried to narrow it down. do u think it is a n ic or 1 of the
    processors?There is like 5 processors on the dsp. i think the crystal
    ic is the 1 that does the processing of the sound , i think the sound
    is converted but when it is routed to th e channel ,i thingk there were
    the problem is at. is there another ic that controls the routing to the
    channel or is it all in 1?
    also could it be something simpliar like
    a diode or resistor or capistor?im a self taught guy.i built a car
    alarm in highschool,so i dont know too much.but wouldn't mind taking on
    the challenge of repairing it myself.Also the gain in knowledge from
    doing it is priceless,please share your wisdom.chriszambrotta@yahoo.com.I read it might be the 100uf capici0rs on dsp.,if so how do I test them.

  • Anonymous Mar 16, 2014

    output on the receiver keeps tripping then resets. checked speakers Infinity rs6000 front rs1000 rear all good. checked wiring good wires are 18ga (small room). this happens no matter what mode it is in (tuner cd...). could this be happening because of the wireing or is the output protection circuit going bad.

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5 Answers

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I have av avr700 with similar problem .i tried to narrow it down. do u think it is a n icor 1 of the processors?Theere is klike 5 processors on the dsp. i think the crystal ic is the 1 that does the processing of the sound , i think the sound is converted but when it is routed to th e channel ,i thingk there were the problem is at. is the re anoth=er ic that doees the routing to the channel or is it all in 1?
also could it be something simpliar like a diode or resistor or capistor?im a self taugght gu.i built a car alarm in highschool,so i dont know too much.but wouldn't mind taking on the challenge of repairing it myself.Also the gain in knowledge from doing it is pricelss,please share your wisdom.chriszambrotta@yahoo.com

Posted on Jan 21, 2008

  • chris ZAMBROTTA
    chris ZAMBROTTA Jan 24, 2008

    I DID AKKL THE ABOVE YPU REQUESTED .I MM A NEW JACK W?PROTENTIAL!.IT S THE DSPP WAT CAN BE WRONG ON THE DSP. IHEARD THAT THE 100UF CAP.TEND TO DRY UP/ WOULD THAT CAAUSE THE FAILURE IN OUTPUTING THE CONVERTED MEDIA?
    OR IS THE MEDIA NOT BEONG CONVERTED AT ALL? THEN THATMEANS IT'S THE PROCESSORES. WEHICH CAN BE COSTLY/. AM I CORRECT OR AM I TOTALLY WRONG?
    IN A NEW JACK
    U ALL R MUCH SMARTER THEN ME.PLEASER HEL ME I WANT TO BE COME GURU'S LIKKE U ALL

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I had a similar problem and i took mine back to circuit city and they told me it was a blown channel, which made since because i was pushing the receiver very hard when i first bought it.

Posted on Nov 29, 2007

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Count me in. Same problem here.. right channel front is out, and i got some weird static noise. From a tech i know who fixes HK's, it's the DSP board that was made cheaply, causes this problem. I've reflowed the whole PCB assembly, and it didn't fix it. HK did provide new DSP boards to service centers to fix units under warranty. I guess it's the board itself that is badly made by the PCB house, else they'd change the part not swap the whole board as they usually do. Will post back if i get a new idea/solution. Thanks.

Posted on Aug 20, 2007

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As you already checked the speakers, the HK manual says to check if the audio analog chain is fine. That means selecting 6/8 direct channels as source and apply a sound source for each channel. You can use a CD and test each pair of the 6/8 inputs at a time or use the output from a PC sound card with a test generator software (some excellent free software available as from NCH swift). Adjust the volume and listen. I guess you will obtain sound from the right front channel. If you have sound in all speakers at the end of the test it means all audio channels are fine end to end. The good news according to HK manual is that you eliminated 90% of the component of the system. The bad news is the problem is in the DSP section. There are no instructions or tests for the DSP part so you will have to go to the service center.

Posted on Jul 18, 2007

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The very FIRST thing to check is to make certain ALL of your speakers have an IMPEDENCE of 8 OHMS. Virtually all speakers of even modest quality will include this specification on a label on the back of the speaker. You CANNOT run more than (2) TWO speakers with 4 OHMs impedence on ANY amplifier (technical discussion too long!) [NOTE: MOST HK equipment have internal overload protection systems to prevent permanent damage. However, you cannot re-set these systems yourself. Your dealer or authorized HK service center must do this.] But, before you take this beast in for service, there is one more "test": check for shorted and/or mis-connected/disconnected speaker cables/wires. Visually inspect connections at the receiver and speakers first. You might find something obvious! If everything looks okay, then disconnect ALL of the speakers; and reconnect and test them one at a time (at relatively low volume.) For example, reconnect the left front speaker, test the system; THEN add the left front, test the system,and so on, ADDING one more speaker each time - FIRST MAKING SURE EACH OF THEM HAS AN IMPEDENCE OF AT LEAST 8 OHMS! IF there is a short (or bad speaker) this will help isolate it. HK is among the best equipment money can buy, and their equipment is pretty much "bullet proof!" Hopefully one of these "fixes" will work for you. GOOD LUCK!

Posted on Jul 18, 2007

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Hi, here is a procedure to discover the source of the problem. No sound from the left front channel can have several sources other than the left front channel itself.
Let's assume, for just now, that the speaker is good and the cable to it is good.
Here is a testing sequence to follow:
1 If you have a CD player connected to it. Put a CD in and put it into play mode.
2 reverse the connectors from the CD player to the receiver. See if the sound moves to the left speaker and stops on the right speaker. Or if it plays fine.
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