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Old 31st Jan 2011, 5:07 pm   #9
dsergeant
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Join Date: Mar 2006
Location: Bracknell, Berkshire,UK.
Posts: 1,169
Default Re: Quad 44 Control Unit

I have finally managed to sort out this Quad 44. I had originally cleaned up the mess from the leaking caps, but obviously not enough. It took a bit of detective work, with the help of the Keith's circuits and isolating stages one by one to show that it came from the middle TL072 - IC702 on his circuits. When I removed that I found there was a small amount of gunge on its pins. A thorough clean of the chip and the pcb under it sorted out the problem. No crackles or the like, good nice audio.

Thanks for the help. I am sure the owner will be pleased.

Dave
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