I took it out of storage the other day and now am having a center channel issue. It sounds as if it is scratchy, almost like a cross somewhere. I have changed speakers and wires but no change. It does it thru all feeds to include FM broadcasts. The louder the worst it gets! I really can't justify spending 69 dollars just to be told it would cost 600 to fix! PLEASE HELP!!!
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Replace center channel speaker with known good one. If no longer scratchy then the voice coil of removed unit is rubbing against the magnet pole and the speaker needs to be replaced. If the replacement speaker also sounds bad, then the amp for the center channel needs repair.
It wouldn't be your output transistors. If they go bad they blow the fuse. Sounds like a speaker relay problem. Have you checked the solder connections on the relays? They sometimes break down. If that doesn't help, I would replace the relay. Center channel goes through RY501. Sony p/n: 1-755-170-11.
First; power conditioner won't do anything for your issue. It's not crosstalk (unless it's a wireless spkr) On your sub are cables mark + & - ? If so make sure they're attached accordingly to back of receiver/amp. Your distortion sounds like a phase issue. I'm also curious how store performed diagnostics?
Can you say explicitly that the Center Channel speaker is defined as something other than NONE?
And how does dialog sound? If it sounds ok you're routing it to the front speakers. This is from the manual...
"For ideal Surround effects, all speakers should be installed. If a
center speaker or subwoofer is not connected, the sound from the unused channel is properly distributed to the connected speakers in order to produce the best Surround sound possible."
Be sure the sound source has a center channel output ie. not a 2 channel source only, try the test tone setup for 5 or 6 channel balance, if no sound from the center channel still then it is looking like maybe the center channel is blown.
Back to basic to advance:
Be sure you have all speakers connected correctly behind the receiver.If you center channel don't have any sound,it could be 7 different issues,but you could try to just hook up your center channel to either the right or the left speaker output to be sure the center channel speaker does work.
Check your the speaker wiring tip(if there is any),i will use just the speaker wire go straight to the center speaker output,go to the receiver to change it to pro-logic or dolby digital and of course you should put in a dvd in the dvd player to have a good quality movie to play the dialogue through the center channel for you test.
If you have tried the above step and still have no sound,you might consider hiring a troubleshooting master to take care of your issue.
Let me know what you need!
Sorry to inform you, The driver transistors or IC is going bad, or there might be a poor solder connection on the center channel Amp. If you know how to solder, you may be able to poke around at the center channel amp circuit, with a wooden or plastic tool, and maybe see where the bad connection(s) are. To get a shop to looki at this unit, may not pay, but that is all up to you, on how much you paid for the unit, and how much your willing to pay to get it fixed. Read this great article and see if it helps you to decide. http://www.techlore.com/article/10602/How-to-Determine-if-you-Should-Repair-a-Broken-Device/
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