Question about Onkyo HT-SR700 System

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Onkyo HT R520 Home Theatre receiver/amplifier

Hi, my onkyo receiver does not give sound to any of the speakers. I have display and selection ability on the panel, but none of the speakers are giving any sound under a variety of input setups. Help? I heard that a "choke coil" might be the problem, but the man at the electronics repair shop laughed at the idea. I don't particularly trust repairmen but I have no idea what to do next. I did look at the fuses near the fire supply. Two had clean straight wires connecting all the way through and two had a straight wire with a bead in the middle - not sure if this is good, bad or indifferent.

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  • 3 more comments 
  • JC6022 Jan 18, 2009

    I have a HT-R520 receiver. I turned it off for the night, including the TV. This morning tried to power it up. Display was correct for all settings. No sound, no TV. Anyone know what may be the problem?

  • Anonymous Jan 29, 2009

    Sometime (not long after purchase) the sound "quit" on mine too. But, I found that if I changed from whichever input I started the unit up on to another input after full power-up the sound worked just fine. Annoying that I had to do that, but it worked.



    Then my in-laws were over and tried to turn everything on. They didn't know "the trick" and just cranked up the volume. Which made smoke come out of the speakers. Thanks....



    So now that my left front speaker terminal died during our last move I've decided to fix it the old fashioned way - buy a new, bigger, and better one.

  • Rossenmsr Feb 10, 2009

    DId you ever get it fixed? I'm trying to find the part that is defective so that I can replace it. 

  • Pete M May 11, 2009

    Anyone have any more info about the choke coil thing??? I have the schematic and need help finding the choke coil. Everything on my unit seems to function properly except it is unable to receive any input signals. Power amp works, but no signal. Also, I have noticed that if I turn up the volume to around 40 and wait a few minutes, it suddenly starts making noise and then sound. If I switch from input to input, the sound gets clear after that. BUT... it is getting worse!!!

  • Matt
    Matt Oct 10, 2013

    HT-R520 receiver powers on the right into standby mode, How doi fix it?

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I had the same problem too. All functions seemed operational but I could not get any sound out of my unit. I took my HT-R520 (4yr Old) to the Onkyo Service center in Denver Colorado (DTS). I paid out $50.00 to have them diagnois the problem. I was hoping that they would listen to me and the info I found via fixya user jaf323 and fix the problem for $50.00. Not....they ignored me. They told me it was my power supply and it would be $250.00 to fix the problem. Sooo, I decided investigate the problem myself. After finding an Okyo schematic free online for the 600 model which is similiar to the HT-R520, I was able to find the L7002 coil. I took my DVM to all of the coils I could get to labled 2R2 on the large horizontal PWA on the right side of the unit as you look at the front panel and sure enough, the L7002 coil was "open". All of the other coils (approx 4) showed a resistance of about 0.3MOhm. I pulled off the bad coil and swapped it out with same coil marked 2R2 from the headphone PWA using a tweezer soldering iron. I am a novice when it comes to electronics. This was a simple fix. BTW the little coils are about 1/8" x1/8" - little guys.

Posted on Apr 03, 2010

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  • OhOneWS6 Sep 11, 2010

    Thanks for the tip on the L7002 location. Like you I never use the headphone jack. I performed the same swap and now my receiver works. I will note you do need a good iron and soldering skills to perform this fix. The coil is surface mount and tiny.

  • silvercobra Oct 25, 2010

    TroubleSHTR, thank you very much for contributing this valulabe experience. I do not know how much time you spent on this issue. It must be a lot and a lot. I saved a lot of time to fix my HT-R520 because of your experience. I exactly followed what you said to fix my HT-R520. After half an hour, my HT-R520 works great. I am so happy getting it fixed. By the way, the L7002 coil is coated with black plastic and roughly as big as a particle of small raw rice or a little bit smaller than 1N4001 diode. It is labled 2R2 in white.

  • dan weeks Dec 02, 2010

    Un friggin believable! I had the same probem and went out in bought a new receiver 3 years ago. I had the old Onkyo in the basement and was ready to throw it out when I saw this post and thought I would give it a try. ( I also had taken it to DTS in Denver and they charged me 50 bucks to tell me it would cost $300 to fix it) It took awhile to find the L7002 coil but once replaced works as good as new!! Trouble Shtr you rock...Great Post!!

  • skyski20 Dec 19, 2010

    Awesome! Thanks so so much. I had exact same problem. Pulled the 2R2 from the headphone jack and put it on L7002 and viola! It is so cool to have the surround back on. I was just about to toss it but check through the threads again. You saved me soooo much. Thanks!!!
    Jerry
    Boise

  • scottstead33 Feb 14, 2011

    I found the service manual on Scribd.http://www.scribd.com/doc/48669646/HTR50... Hoping to fix mine this week. Same problem. So question - which coil is the headphone coil? There are two other NCH-1479 coils (not NCH-1471 as described by a previous users). One is L703 and the other is L7001. Which did you all swap with?

  • workenharder Apr 28, 2011

    Thanks a bunch for this. Extremely helpful insight. I bought this same receiver for $40. The guy said it worked 100%. I met him @ mcdonalds. Plugged it in and it turned on np. But after I had hooked my entire sound system into it...realized there was no sound any were. I have yet to complete this fix you mentioned. But I'm sure that's the right way. Thanks again for saving my $40 from being thrown out the window!

  • Nathan Dec 04, 2011

    I can't find the 2R2 coil on the headphone jack or locate the headphone coil in the service manual. Any help would be appreciated!

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Thanks TroubleSHTR, your solution worked great. I did swap the L7503 (2R2 choke coil) from the headphone board with the L7002 (2R2 choke coil) that was failed. Took all of 30 minutes. I was confused initially because there is also an L702 which tested fine. Here are some pics for those trying to locate it. L7002 under the ribbon by the connector. L7503 at to of headphone board.


Cheers


Onkyo HT R520 Home Theatre receiver/amplifier - 5_21_2012_12_59_34_am.jpg
5_21_2012_1_00_26_am.jpg

Posted on May 21, 2012

  • chuck willis Jul 05, 2015

    how do you factory reset

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I did a factory reset on mine and it is working at the moment...

Posted on Apr 19, 2010

  • housedl69 Apr 19, 2010

    i did a factory reset on mine and it is working right now... hopefully it lasts.

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L7002 was the dud. Check all the choke coils on the preamp board with a DVM for open (blown) coils. L7002 appeared to be the only open coil (infinite resistance) on my board.

Service Manual on Page 85 defines L7002 as: "NCH-1471" PN: 231237M022R2 OR "NCH-1587-022k" PN: 233533K022R2

You can find the same part on the headphones board. I don't use headphones, so I pulled it off the headphones board and soldered to the L7002 spot and it started working again..

Posted on Nov 16, 2009

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I have a HT-R520 receiver that powers on the right back off, How do I fix this cheap.

Posted on Oct 10, 2013

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Does anyone have a service manual for this receiver? Jaf323? I think it's ridiculous to pay $15 for a probably free pdf

Posted on Mar 02, 2010

  • scottstead33 Feb 12, 2011

    I found the service manual on Scribd.http://www.scribd.com/doc/48669646/HTR50... Hoping to fix mine this week. Same problem. So question - which coil is the headphone coil? There are two other NCH-1479 coils (not NCH-1471 as described by a previous users). One is L703 and the other is L7001. Which did you all swap with?

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I had the same problem and united radio in New York fixed mine for $105.90 blown choke coil.call them at 1-800-634-8606

Posted on Apr 23, 2008

  • skyski20 Dec 19, 2010

    I had same problem as above. Bad L7002. Replaced one from the headphone jack. Problem solved. I was just about to throw this out. It is great to have the sound back after so long without. Mucho Kudos to the trobleshooter above.
    Jerry
    Boise

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