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Re: K200A-1 Power Amp Rescue Needed [message #27263 is a reply to message #27262]

Mon, 22 April 2019 10:27

JDinPA17603
Messages: 69
Registered: May 2018
Location: Lancaster, PA

Member

I had questioned thetragichero on the 602 board in his initial post because I knew it was the negative regulator board.
After several pm's he sent me photos - front and back of the board and it was in fact a 602! Someone in the past "worked"on the amp and literally mangled it. The issue of the 602 board is now moot. He rebuilt the power supply section on a board and added an IC regulator to provide the +23 volt supply for the 102 boards. Now have the +23 and 40 volt +/- supplies solid. Tackling issues with the 702 board now. Discovered several "replacement" components out of tolerance, connected to the wrong points, etc. Also as I stated in post above, the 1N3754 had been replaced with a substitute diode that was covered in thermal grease and hanging in mid air. After replacing all the caps on the 702 board he is in the process of checking the rest of the components.

RE messages in queue - I had only passed that on as he had stated it tome at the time he was constantly booted off after logging in. Did not mean that you had missed anything Steve.

John

Old Us Navy Vietnam Vet
Playing for my own enjoyment and irritation of the neighbors.

[Updated on: Mon, 22 April 2019 10:32]

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[Message index]

		K200A-1 Power Amp Rescue Needed By: thetragichero on Fri, 19 April 2019 13:28
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Sat, 20 April 2019 06:20
		Re: K200A-1 Power Amp Rescue Needed By: chicagobill on Sat, 20 April 2019 12:59
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Sat, 20 April 2019 15:10
		Re: K200A-1 Power Amp Rescue Needed By: chicagobill on Sat, 20 April 2019 22:09
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Sun, 21 April 2019 06:06
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Mon, 22 April 2019 02:41
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Mon, 22 April 2019 06:09
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Mon, 22 April 2019 10:27
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Mon, 22 April 2019 11:27
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Mon, 22 April 2019 12:19
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Mon, 22 April 2019 12:39
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Mon, 22 April 2019 23:47
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Tue, 23 April 2019 06:14
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Thu, 25 April 2019 10:11
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Thu, 25 April 2019 12:27
		Re: K200A-1 Power Amp Rescue Needed By: chicagobill on Thu, 25 April 2019 13:18
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Thu, 25 April 2019 14:10
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Thu, 25 April 2019 14:17
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Thu, 25 April 2019 14:48
		Re: K200A-1 Power Amp Rescue Needed By: chicagobill on Thu, 25 April 2019 15:21
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Thu, 25 April 2019 16:28
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Sat, 27 April 2019 22:20
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Sun, 28 April 2019 00:14
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Sun, 28 April 2019 06:04
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Sun, 28 April 2019 09:34
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Wed, 08 May 2019 00:51
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Wed, 08 May 2019 18:39
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Thu, 09 May 2019 17:31
		Re: K200A-1 Power Amp Rescue Needed By: chicagobill on Fri, 10 May 2019 12:07
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Fri, 10 May 2019 12:17
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Wed, 15 May 2019 12:20
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Fri, 17 May 2019 16:46
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Fri, 17 May 2019 19:47
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Fri, 17 May 2019 21:46
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Sat, 18 May 2019 05:54
		Re: K200A-1 Power Amp Rescue Needed By: thetragichero on Sat, 18 May 2019 10:40
		Re: K200A-1 Power Amp Rescue Needed By: stevem on Sun, 19 May 2019 05:54
		Re: K200A-1 Power Amp Rescue Needed By: JDinPA17603 on Sun, 19 May 2019 08:37

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