1
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Chuck
23
Asked
Sound quits and it clicks
Great Kenwood Eleven III reciever works for a while then goes silent after a click sound is heard
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IanCD
43
Answered
Accepted Answer
Here is my 2 cents worth on fixing Audio Amplifiers/Rece
Many use single sided PC boards for the analog sections.
Output transistors and connectors are mounted onto sub-assemblies (e.g. heat sinks) and the leads soldered into the PCBs. Over time, vibration and thermal expansion/contr
I have had this issue with two Sony and one HK 5.1 receivers in just last the couple of months.
If you feel comfortable working around high voltages (120V DC is not unusual for high power amps)- take off the access panels and tap around the single sided boards with a NON-CONDUCTIVE probe. If you are lucky you will identify the broken joint. You can then power down, WAIT FOR THE SUPPLY CAPACITORS TO DISCHARGE (remember you can still get zapped even a long time after the power cord is disconnected!) then re-solder it.
I'm also an EE, but fixing audio is just a hobby ;-)
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Score
Skippy722
1.8k
Answered
2
Score
Fred
115
Answered
What other symptoms?
Power indicator on? If not, check things that affect power, like circuit breakers (things that reset, obviously not fuses).
Does it consistently take the same amount of time to shut down?
Can you affect the amount of time to shut down by removing heat (removing case, or routing an air source into the receiver)? If so, you can selectively spray a cold source (used to be trichlorotriflu
I'd have to look at it to provide help beyond this. Unless you have experience, your chances of success are small. A good technician is worth the money. I'm a EE, and been troubleshooting for nearly 40 years.
Thanks guys, sorry for the lag in replying to the posts. I have not been able to get to the unit so I will post my findings as soon as I get to it. I remember my dad used to spray that stuff on the components after a unit shut off to see if it would come back on, so I know what you are talking about. Also it typ takes about the same amount of time to shut off so it might very well be a heat related issue (breakdown of a component). I wish I lived closer to my dad(Knoxville), as he was a bench tech for many years. He became a preacher so gave it up after a while as he was pastoring. Now he is retired and could maybe do some more fixing. The 2 guys in Orlando retired a couple yrs ago so nobody here does vintage stuff.
Chuck,
I went to boot camp in Orlando, Chuck, in '71, and I'm a part time preacher. Tell your dad it's not the same, as today's electronics are throw-away. Resources aren't readily available to the public, so all the fun's in the older electronics.
Fred,