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Old 23rd December 2009, 03:23 AM   #21
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ok replaced the opamp when speaker is connected it plays music but its distorted

wondering where i go from here
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Old 23rd December 2009, 03:27 AM   #22
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Location: Louisiana
Before you do anything else, confirm that you have both positive and negative rail voltage on the outputs for this channel.

Is your scope still out of order?

If so, do you have a 10-100k potentiometer?
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Old 23rd December 2009, 03:34 AM   #23
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i have positive rail voltage on the 9540 of 23.86

540 is the negative and thats -17.17

my scope is still down

i have a pot somewhere
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Old 23rd December 2009, 03:37 AM   #24
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Is the fuse blown (or loose in the holder)?

You should have approximately -25v on the IRF540.
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Old 23rd December 2009, 03:43 AM   #25
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irf540

leg1= -11.97

middle leg=0.86

3rd leg = -25.84
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Old 23rd December 2009, 03:45 AM   #26
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That transistor is defective.
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Old 23rd December 2009, 04:06 AM   #27
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Thanks Perry,

I replaced the 540 it had a broken leg on it powerd amp up and now its playing fine


Thanks again
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