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Old 09-26-2020, 09:14 PM   #4
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Join Date: Jun 2012
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Default Re: troubleshooting definitive technology prosub 60

Originally Posted by khajr View Post
Thanks BadCaps. The new Q1 and Q7 are shorted source to gate. All pins were shorted on the ones I took out. I did replace U3d and more zener diodes are on order. I will check Q3, Q4, and Q5.
You can use a 60~100 watt incandescent lamp in series with the a/c input, this will limit the current and may help prevent the amp from blowing up during troubleshooting.
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