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Re: Kustom 100 blowing fuse [message #18017 is a reply to message #18016]

Tue, 08 January 2013 10:39

stevem
Messages: 4745
Registered: June 2004
Location: NY

Senior Member

Welcome!
Yes, your problem is likly to be the same and likly to be a blown output transistor( TO3 type mounted on chassis heat sink) which sometimes also takes out its driver transistor(TO5 type in heat sink box on driver board)when it pops.
Also likly to be bad would be the 5 watt resistor associtaed with that side of the output stage.
Your rectifier bridge diode may also be bad, this is the round case 4 terminal item bolted down to the chassis near the power transformer.
A good way to check that is to unhook the red and green wires that come from it from there termination point on each power supply filter.
When unhooked and place out of the way from shorting, replace the fuse and turn on the amp, if the fuse holds them you know that the power supply is ok and the problem resides in the output stage/driver section of the amp.
You could also disconnect the output side of each power supply filter(red and green wire) and do the same test.
Do not hook up a test speaker to the amp until you have it fixed and the steady state DC reads less than 1 volt on the amps speaker output other wise the 40 volts of DC output can blow your speakers.
Inform us on your progress, or if you need more help.

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[Message index]

		Kustom 100 blowing fuse By: imsteinrecording on Tue, 08 January 2013 05:45
		Re: Kustom 100 blowing fuse By: stevem on Tue, 08 January 2013 10:39
		Re: Kustom 100 blowing fuse By: imsteinrecording on Tue, 08 January 2013 16:16
		Re: Kustom 100 blowing fuse By: timetraveler on Wed, 10 April 2019 17:58
		Re: Kustom 100 blowing fuse By: chicagobill on Tue, 08 January 2013 12:03
		Re: Kustom 100 blowing fuse By: imsteinrecording on Tue, 08 January 2013 16:17
		Re: Kustom 100 blowing fuse By: chicagobill on Thu, 11 April 2019 15:15
		Re: Kustom 100 blowing fuse By: timetraveler on Fri, 12 April 2019 09:55
		Re: Kustom 100 blowing fuse By: stevem on Fri, 12 April 2019 06:10
		Re: Kustom 100 blowing fuse By: stevem on Fri, 12 April 2019 12:32
		Re: Kustom 100 blowing fuse By: chicagobill on Fri, 12 April 2019 13:31
		Re: Kustom 100 blowing fuse By: JDinPA17603 on Fri, 12 April 2019 21:02
		Re: Kustom 100 blowing fuse By: timetraveler on Sat, 13 April 2019 12:08
		Re: Kustom 100 blowing fuse By: stevem on Sat, 13 April 2019 06:24
		Re: Kustom 100 blowing fuse By: timetraveler on Sat, 13 April 2019 14:07
		Re: Kustom 100 blowing fuse By: timetraveler on Sat, 13 April 2019 14:14
		Re: Kustom 100 blowing fuse By: stevem on Sun, 14 April 2019 06:13
		Re: Kustom 100 blowing fuse By: JDinPA17603 on Sun, 14 April 2019 11:01
		Re: Kustom 100 blowing fuse By: timetraveler on Sun, 14 April 2019 19:05
		Re: Kustom 100 blowing fuse By: stevem on Mon, 15 April 2019 06:12
		Re: Kustom 100 blowing fuse By: chicagobill on Mon, 15 April 2019 12:23
		Re: Kustom 100 blowing fuse By: timetraveler on Mon, 22 April 2019 17:02
		Re: Kustom 100 blowing fuse By: JDinPA17603 on Mon, 22 April 2019 19:12
		Re: Kustom 100 blowing fuse By: timetraveler on Tue, 23 April 2019 10:42
		Re: Kustom 100 blowing fuse By: JDinPA17603 on Tue, 23 April 2019 12:12
		Re: Kustom 100 blowing fuse By: stevem on Tue, 23 April 2019 12:13
		Re: Kustom 100 blowing fuse By: chicagobill on Tue, 23 April 2019 12:30
		Re: Kustom 100 blowing fuse By: stevem on Tue, 23 April 2019 12:35
		Re: Kustom 100 blowing fuse By: timetraveler on Tue, 23 April 2019 13:19
		Re: Kustom 100 blowing fuse By: JDinPA17603 on Tue, 23 April 2019 18:00
		Re: Kustom 100 blowing fuse By: timetraveler on Wed, 24 April 2019 08:33
		Re: Kustom 100 blowing fuse By: chicagobill on Thu, 25 April 2019 13:20
		Re: Kustom 100 blowing fuse By: timetraveler on Thu, 09 May 2019 14:19
		Re: Kustom 100 blowing fuse By: JDinPA17603 on Thu, 09 May 2019 16:33
		Re: Kustom 100 blowing fuse By: timetraveler on Fri, 17 May 2019 11:43
		Re: Kustom 100 blowing fuse By: timetraveler on Sun, 19 May 2019 08:48
		Re: Kustom 100 blowing fuse By: timetraveler on Tue, 04 June 2019 13:31
		Re: Kustom 100 blowing fuse By: timetraveler on Tue, 04 June 2019 13:34
		Re: Kustom 100 blowing fuse By: stevem on Wed, 24 April 2019 07:40
		Re: Kustom 100 blowing fuse By: stevem on Fri, 17 May 2019 12:21
		Re: Kustom 100 blowing fuse By: timetraveler on Fri, 17 May 2019 12:51
		Re: Kustom 100 blowing fuse By: stevem on Fri, 17 May 2019 13:40
		Re: Kustom 100 blowing fuse By: chicagobill on Sun, 19 May 2019 15:13
		Re: Kustom 100 blowing fuse By: stevem on Mon, 27 May 2019 05:45
		Re: Kustom 100 blowing fuse By: chicagobill on Tue, 04 June 2019 23:28
		Re: Kustom 100 blowing fuse By: chicagobill on Wed, 05 June 2019 12:26
		Re: Kustom 100 blowing fuse By: timetraveler on Wed, 05 June 2019 20:27
		Re: Kustom 100 blowing fuse By: stevem on Wed, 05 June 2019 12:35
		Re: Kustom 100 blowing fuse By: timetraveler on Wed, 05 June 2019 20:19
		Re: Kustom 100 blowing fuse By: chicagobill on Wed, 05 June 2019 23:45
		Re: Kustom 100 blowing fuse By: chicagobill on Thu, 06 June 2019 01:36
		Re: Kustom 100 blowing fuse By: timetraveler on Thu, 06 June 2019 12:08
		Re: Kustom 100 blowing fuse By: stevem on Thu, 06 June 2019 12:25
		Re: Kustom 100 blowing fuse By: timetraveler on Thu, 06 June 2019 12:53
		Re: Kustom 100 blowing fuse By: chicagobill on Thu, 06 June 2019 15:34
		Re: Kustom 100 blowing fuse By: stevem on Fri, 07 June 2019 06:06
		Re: Kustom 100 blowing fuse By: timetraveler on Fri, 07 June 2019 12:17
		Re: Kustom 100 blowing fuse By: chicagobill on Fri, 07 June 2019 15:28
		Re: Kustom 100 blowing fuse By: timetraveler on Sat, 08 June 2019 09:24
		Re: Kustom 100 blowing fuse By: stevem on Sat, 08 June 2019 05:30
		Re: Kustom 100 blowing fuse By: chicagobill on Sat, 08 June 2019 12:01
		Re: Kustom 100 blowing fuse By: timetraveler on Mon, 10 June 2019 15:16
		Re: Kustom 100 blowing fuse By: chicagobill on Mon, 10 June 2019 19:47
		Re: Kustom 100 blowing fuse By: timetraveler on Wed, 12 June 2019 08:51
		Re: Kustom 100 blowing fuse By: stevem on Wed, 12 June 2019 12:07
		Re: Kustom 100 blowing fuse By: chicagobill on Wed, 12 June 2019 12:09
		Re: Kustom 100 blowing fuse By: timetraveler on Wed, 12 June 2019 21:24

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