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Re: Repairing a Kustom TBR400 [message #29168 is a reply to message #29143]

Wed, 08 November 2023 17:11

stevem
Messages: 4786
Registered: June 2004
Location: NY

Senior Member

Right now I can't find my schematic for this amp, but I do recall mine blowing up about 12 years ago and mine burned up those same two resistors.
This was with all of about 10 hours of play time on the amp.

Fortunately it did it at home and to this day I still gig with my 1971 K250 head, talk about a testimonial to build quality!

I just can't recall what more I did back then to fix the whole issue.

I think there are power supply voltage regulators on the left side of the heat sink as seen with the output transistors facing you, might be worth checking those.

What I do recall is that the traces on that board lifted very easily and even with a desoldering station had to jump a few connections back to working.

Give me a few days to think about this.

[Updated on: Wed, 08 November 2023 17:14]

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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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