Hello ! I'm trying to troubleshoot an Harman HT receiver that's been sitting on my shelf for about 1 year now. I had it as my main receiver.. and someday it quit working.
Everything works, it's just audio has some evil noise in it, shrrrrekkk in the speakers, its very bad. I think it's badcaps, it happens in digital and analog inputs. It works fine for some minutes (just a few) and then stats doing it.
I've seen a few bad caps in there, replaced them (a year ago..) but the issue has remained, so i've missed something. I don't see anything visually bad.. and i got no ideas where to start. I've been doing meter tests on caps around but havent seen anything bad. If anyone has any pointers !
I took a few pictures and the service manual. If anyone has a clue i'd be quite happy to get this one going (this is a beast from 2004, their flagship receiver..)
I was also wondering.. eventually i was looking to buy an oscilloscope as ive never used one. I wonder if it could help me to fix this one by learning how to use and to find and fix the fault..
Here are the pictures :
http://www.fusioninformatique.com/temp/AVR_7300/
Thanks for any help !!!!!!
Everything works, it's just audio has some evil noise in it, shrrrrekkk in the speakers, its very bad. I think it's badcaps, it happens in digital and analog inputs. It works fine for some minutes (just a few) and then stats doing it.
I've seen a few bad caps in there, replaced them (a year ago..) but the issue has remained, so i've missed something. I don't see anything visually bad.. and i got no ideas where to start. I've been doing meter tests on caps around but havent seen anything bad. If anyone has any pointers !
I took a few pictures and the service manual. If anyone has a clue i'd be quite happy to get this one going (this is a beast from 2004, their flagship receiver..)
I was also wondering.. eventually i was looking to buy an oscilloscope as ive never used one. I wonder if it could help me to fix this one by learning how to use and to find and fix the fault..
Here are the pictures :
http://www.fusioninformatique.com/temp/AVR_7300/
Thanks for any help !!!!!!
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