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Re: Repair advise [message #19089 is a reply to message #19064]

Sun, 11 August 2013 14:34

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

The part that you are referring to is a resistor. I doubt that it is leaking. What you are seeing is more likely residue from the original one that burned up. That board also shows that two transistors have been changed. The original blue resistors are metal film types that are rated at 1%. They were chosen for their low noise characteristics. The one that is in there is a standard carbon comp resistor.

The tooth lock washers are there to keep the mounting nuts from coming loose and to insure that the board is grounded to the chassis. You do not want the board insulated from the chassis metal.

There is some stupid repair or mod done to the power amp board that shows the quality of the earlier work done on the amp. There are two resistors and a blue cap that are floating off of the board. If the power amp is working and you are happy with the sound, leave it alone and just fix the preamp.

Now that we've seen the amp, tell us which channel is dead, the straignt or the fx channel?

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[Message index]

		Repair advise By: Jonomega3 on Fri, 09 August 2013 15:44
		Re: Repair advise By: chicagobill on Fri, 09 August 2013 16:28
		Re: Repair advise By: Jonomega3 on Fri, 09 August 2013 19:56
		Re: Repair advise By: chicagobill on Fri, 09 August 2013 21:36
		Re: Repair advise By: Jonomega3 on Sat, 10 August 2013 07:52
		Re: Repair advise By: pleat on Sat, 10 August 2013 08:15
		Re: Repair advise By: Jonomega3 on Sat, 10 August 2013 08:31
		Re: Repair advise By: Jonomega3 on Sat, 10 August 2013 18:09
		Re: Repair advise By: Jonomega3 on Sat, 10 August 2013 23:30
		Re: Repair advise By: Jonomega3 on Sat, 10 August 2013 14:50
		Re: Repair advise By: chicagobill on Sat, 10 August 2013 12:55
		Re: Repair advise By: chicagobill on Sun, 11 August 2013 14:34
		Re: Repair advise By: Jonomega3 on Sun, 11 August 2013 14:46
		Re: Repair advise By: Jonomega3 on Sun, 11 August 2013 16:17
		Re: Repair advise By: chicagobill on Sun, 11 August 2013 22:20
		Re: Repair advise By: Jonomega3 on Sun, 11 August 2013 22:41
		Re: Repair advise By: chicagobill on Sun, 11 August 2013 22:53
		Re: Repair advise By: Jonomega3 on Mon, 12 August 2013 12:19
		Re: Repair advise By: chicagobill on Mon, 12 August 2013 12:57
		Re: Repair advise By: Jonomega3 on Mon, 12 August 2013 22:43
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 00:26
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 10:34
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 11:35
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 12:06
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 13:33
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 13:38
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 13:48
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 15:03
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 15:08
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 15:23
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 16:16
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 16:37
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 17:16
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 17:37
		Re: Repair advise By: chicagobill on Tue, 13 August 2013 18:16
		Re: Repair advise By: pleat on Tue, 13 August 2013 21:18
		Re: Repair advise By: Jonomega3 on Tue, 13 August 2013 21:52
		Re: Repair advise By: pleat on Wed, 14 August 2013 07:23
		Re: Repair advise By: Jonomega3 on Wed, 14 August 2013 09:07
		Re: Repair advise By: chicagobill on Wed, 14 August 2013 12:33
		Re: Repair advise By: Jonomega3 on Thu, 15 August 2013 08:59
		Re: Repair advise By: chicagobill on Thu, 15 August 2013 13:26
		Re: Repair advise By: Jonomega3 on Thu, 15 August 2013 13:41
		Re: Repair advise By: chicagobill on Thu, 15 August 2013 15:17
		Re: Repair advise By: Jonomega3 on Thu, 15 August 2013 15:40
		Re: Repair advise By: chicagobill on Thu, 15 August 2013 16:15
		Re: Repair advise By: Jonomega3 on Thu, 15 August 2013 16:29
		Re: Repair advise By: chicagobill on Fri, 16 August 2013 12:16
		Re: Repair advise By: Jonomega3 on Fri, 16 August 2013 13:12
		Re: Repair advise By: chicagobill on Fri, 16 August 2013 13:36
		Re: Repair advise By: Jonomega3 on Fri, 16 August 2013 13:39
		Re: Repair advise By: chicagobill on Fri, 16 August 2013 14:55
		Re: Repair advise By: Jonomega3 on Fri, 16 August 2013 15:27
		Re: Repair advise By: chicagobill on Fri, 16 August 2013 15:52
		Re: Repair advise By: Jonomega3 on Fri, 16 August 2013 16:00
		Re: Repair advise By: chicagobill on Fri, 16 August 2013 16:41
		Re: Repair advise By: Jonomega3 on Fri, 16 August 2013 20:44

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