Question about Onkyo HT-SR700 System
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.
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
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.
Posted on May 21, 2012
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
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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Posted on Jan 02, 2017
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