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Old 20th February 2013, 05:19 AM   #1
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Default PowerBass XA3000D

Well I have a PowerBass XA3000D that someone tried to fix but was not successful. the power supply was toast I fixed that and now it powers up and idles right but there is no out put. there is 108 volts on the legs of the out puts.
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Old 20th February 2013, 07:22 AM   #2
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Do you have rail-rail oscillation on the output transistors?

Is the master/slave switch set to master?
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Old 20th February 2013, 07:43 AM   #3
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HI perry what do you mean Do you have rail-rail oscillation on the output transistors? how do I check that?
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Old 20th February 2013, 07:51 AM   #4
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and yes its set to master.
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Old 20th February 2013, 08:35 AM   #5
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Set your scope to 50v/div and 10us. Touch the scope probe to the legs that didn't have 100+v. You should see a square wave that swings from the positive rail to the negative rail.
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Old 20th February 2013, 05:12 PM   #6
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Sorry Perry I don't have a scope yet I should have one in the next few days and then I still need to learn how to use it. Can I do anything with my DMM?
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Old 20th February 2013, 05:25 PM   #7
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If you're going to have a scope in a few days, it would be better to wait.
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Old 20th February 2013, 05:35 PM   #8
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OK thanks!!
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Old 20th February 2013, 06:02 PM   #9
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Find a downloadable copy of the owner's manual for your scope and read it from cover to cover.
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Old 20th February 2013, 06:17 PM   #10
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ok will do!
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