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Re: Help [message #25772 is a reply to message #25748]

Sat, 14 January 2017 21:36

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

I'm confused here, but that's easy for me. Which model amp are you fixing here?

How many driver transistors are there on the board? There are two different driver transistor types, one NPN and one PNP. You must replace the NPN with another NPN and the PNP with another PNP. When you test them they will test differently the NPN will read low when the red lead is on the base and the PNP will read low with the black lead on the base.

Please tell us which anp and how you are testing the transistors, so we can help you fix it correctly.

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[Message index]

		Help By: Kawiokie on Mon, 09 January 2017 11:10
		Re: Help By: rodak on Mon, 09 January 2017 11:17
		Re: Help By: Kawiokie on Mon, 09 January 2017 11:51
		Re: Help By: chicagobill on Mon, 09 January 2017 12:09
		Re: Help By: Kawiokie on Mon, 09 January 2017 12:27
		Re: Help By: Kawiokie on Mon, 09 January 2017 13:03
		Re: Help By: rodak on Mon, 09 January 2017 13:10
		Re: Help By: Kawiokie on Mon, 09 January 2017 13:48
		Re: Help By: rodak on Mon, 09 January 2017 16:18
		Re: Help By: Kawiokie on Mon, 09 January 2017 16:22
		Re: Help By: chicagobill on Mon, 09 January 2017 18:05
		Re: Help By: Kawiokie on Mon, 09 January 2017 18:10
		Re: Help By: stevem on Tue, 10 January 2017 06:16
		Re: Help By: Kawiokie on Tue, 10 January 2017 13:27
		Re: Help By: stevem on Tue, 10 January 2017 14:03
		Re: Help By: Kawiokie on Wed, 11 January 2017 10:37
		Re: Help By: chicagobill on Wed, 11 January 2017 12:29
		Re: Help By: Kawiokie on Wed, 11 January 2017 12:46
		Re: Help By: stevem on Thu, 12 January 2017 06:03
		Re: Help By: Kawiokie on Sat, 14 January 2017 09:05
		Re: Help By: stevem on Sat, 14 January 2017 11:58
		Re: Help By: Kawiokie on Sat, 14 January 2017 15:21
		Re: Help By: chicagobill on Sat, 14 January 2017 21:36
		Re: Help By: stevem on Sun, 15 January 2017 06:36
		Re: Help By: Kawiokie on Mon, 16 January 2017 07:26
		Re: Help By: stevem on Mon, 16 January 2017 12:20
		Re: Help By: Kawiokie on Mon, 16 January 2017 12:23
		Re: Help By: stevem on Mon, 16 January 2017 12:37
		Re: Help By: chicagobill on Mon, 16 January 2017 12:45
		Re: Help By: stevem on Mon, 16 January 2017 14:28

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