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Re: Repairing a Kustom TBR400 [message #29166 is a reply to message #29143]

Wed, 08 November 2023 11:00

weezykid
Messages: 9
Registered: October 2023
Location: PA

Junior Member

Replaced the r314 and R337 4.7k with 1 watts. Replaced the c321/322 since they were humped and replaced the a970 transistor.

Bringing up the volts on the variac, the variac reset pops at 70v so there is still an issue.

When I had the rest apart I pulled the rectifier and it tests good. When I pll the red lines for the transformer, the amp powers on happy, fan blowing and all "seems" good. Red lines off the transformer measure 106v at 113v ont he variac. Pulled the power lines for the output board to try and narrow down the area, but the variac still pops so the issue is on the main board.

During the test up to 70v, I did not see DC on the outputs.

Mike

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[Message index]

		Repairing a Kustom TBR400 By: weezykid on Tue, 24 October 2023 10:53
		Re: Repairing a Kustom TBR400 By: stevem on Tue, 24 October 2023 15:10
		Re: Repairing a Kustom TBR400 By: weezykid on Tue, 24 October 2023 15:15
		Re: Repairing a Kustom TBR400 By: stevem on Wed, 25 October 2023 06:49
		Re: Repairing a Kustom TBR400 By: weezykid on Tue, 31 October 2023 11:55
		Re: Repairing a Kustom TBR400 By: weezykid on Wed, 08 November 2023 11:00
		Re: Repairing a Kustom TBR400 By: weezykid on Wed, 08 November 2023 11:01
		Re: Repairing a Kustom TBR400 By: stevem on Wed, 08 November 2023 17:11
		Re: Repairing a Kustom TBR400 By: weezykid on Thu, 09 November 2023 10:02
		Re: Repairing a Kustom TBR400 By: stevem on Thu, 09 November 2023 11:42
		Re: Repairing a Kustom TBR400 By: weezykid on Tue, 21 November 2023 15:39
		Re: Repairing a Kustom TBR400 By: stevem on Wed, 22 November 2023 07:04
		Re: Repairing a Kustom TBR400 By: weezykid on Fri, 05 January 2024 08:56

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