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Re: A-4 Repair [message #26536 is a reply to message #26535]

Fri, 09 February 2018 12:54

Jonomega3
Messages: 81
Registered: November 2012

Member

Not sure how to do a voltage test on transistors, any tips? Happy to replace the transistors you mentioned do you have a supply company recommendation?

I did replace the one 82k resistor on R705 which is the only resistor I replaced I then fired the amp up and the distortion is still there only the volume is a little better and the distortion is more of a fuzztone in the background now instead of a breakup.

Another strange thing is on the speaker output jack. a large 1.0 cap with a large watt 20 ohm resistor couple between the ground and tip on the jack. Would you like a pic? lol
I checked the schematics and couldn't find anything on the speaker outputs. Should I do away with that?

[Updated on: Fri, 09 February 2018 12:55]

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[Message index]

		A-4 Repair By: Jonomega3 on Sat, 27 January 2018 08:20
		Re: A-4 Repair By: chicagobill on Sat, 27 January 2018 12:26
		Re: A-4 Repair By: Jonomega3 on Sun, 28 January 2018 00:28
		Re: A-4 Repair By: chicagobill on Sun, 28 January 2018 14:13
		Re: A-4 Repair By: Jonomega3 on Sun, 28 January 2018 15:44
		Re: A-4 Repair By: stevem on Mon, 29 January 2018 08:18
		Re: A-4 Repair By: Jonomega3 on Mon, 29 January 2018 21:16
		Re: A-4 Repair By: chicagobill on Mon, 29 January 2018 23:48
		Re: A-4 Repair By: stevem on Tue, 30 January 2018 12:07
		Re: A-4 Repair By: Jonomega3 on Tue, 30 January 2018 13:24
		Re: A-4 Repair By: stevem on Tue, 30 January 2018 15:24
		Re: A-4 Repair By: Jonomega3 on Wed, 31 January 2018 12:47
		Re: A-4 Repair By: stevem on Thu, 01 February 2018 08:23
		Re: A-4 Repair By: Jonomega3 on Thu, 01 February 2018 11:13
		Re: A-4 Repair By: Jonomega3 on Thu, 08 February 2018 15:12
		Re: A-4 Repair By: stevem on Fri, 09 February 2018 08:32
		Re: A-4 Repair By: Jonomega3 on Fri, 09 February 2018 12:54
		Re: A-4 Repair By: chicagobill on Fri, 09 February 2018 15:39
		Re: A-4 Repair By: Jonomega3 on Fri, 09 February 2018 17:07
		Re: A-4 Repair By: Jonomega3 on Fri, 09 February 2018 18:30
		Re: A-4 Repair By: chicagobill on Fri, 09 February 2018 23:46
		Re: A-4 Repair By: Jonomega3 on Sat, 10 February 2018 12:00
		Re: A-4 Repair By: chicagobill on Sat, 10 February 2018 23:54
		Re: A-4 Repair By: Jonomega3 on Sun, 11 February 2018 00:27
		Re: A-4 Repair By: stevem on Sun, 11 February 2018 06:24
		Re: A-4 Repair By: Jonomega3 on Sun, 11 February 2018 10:58
		Re: A-4 Repair By: chicagobill on Sun, 11 February 2018 15:41
		Re: A-4 Repair By: Jonomega3 on Sun, 11 February 2018 21:05
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 10:10
		Re: A-4 Repair By: stevem on Mon, 12 February 2018 07:29
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 09:04
		Re: A-4 Repair By: stevem on Mon, 12 February 2018 10:18
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 10:41
		Re: A-4 Repair By: chicagobill on Mon, 12 February 2018 12:47
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 13:25
		Re: A-4 Repair By: chicagobill on Mon, 12 February 2018 14:25
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 16:07
		Re: A-4 Repair By: chicagobill on Mon, 12 February 2018 18:08
		Re: A-4 Repair By: stevem on Tue, 13 February 2018 07:39
		Re: A-4 Repair By: Jonomega3 on Tue, 13 February 2018 11:04
		Re: A-4 Repair By: chicagobill on Tue, 13 February 2018 16:40
		Re: A-4 Repair By: Jonomega3 on Thu, 26 July 2018 12:43
		Re: A-4 Repair By: chicagobill on Fri, 27 July 2018 00:02
		Re: A-4 Repair By: Jonomega3 on Sat, 28 July 2018 14:31
		Re: A-4 Repair By: stevem on Sun, 29 July 2018 06:06
		Re: A-4 Repair By: Jonomega3 on Sun, 29 July 2018 14:10
		Re: A-4 Repair By: Jonomega3 on Thu, 16 August 2018 11:45
		Re: A-4 Repair By: stevem on Thu, 16 August 2018 12:40
		Re: A-4 Repair By: Jonomega3 on Thu, 16 August 2018 13:14
		Re: A-4 Repair By: Jonomega3 on Thu, 16 August 2018 18:51
		Re: A-4 Repair By: stevem on Fri, 17 August 2018 06:51
		Re: A-4 Repair By: Jonomega3 on Fri, 17 August 2018 06:58
		Re: A-4 Repair By: stevem on Sun, 19 August 2018 06:15
		Re: A-4 Repair By: Jonomega3 on Mon, 20 August 2018 12:18
		Re: A-4 Repair By: stevem on Mon, 20 August 2018 12:27
		Re: A-4 Repair By: Jonomega3 on Fri, 24 August 2018 18:22
		Re: A-4 Repair By: chicagobill on Sat, 25 August 2018 00:15
		Re: A-4 Repair By: Jonomega3 on Sat, 25 August 2018 07:58
		Re: A-4 Repair By: Jonomega3 on Sat, 25 August 2018 11:43
		Re: A-4 Repair By: chicagobill on Sat, 25 August 2018 12:41

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