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Old 28th August 2012, 03:34 AM   #1
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Default ALPINE MRP-M500

This amp powers up but no sound..

I have both + - 15 volts on all op-amps

I also have both + - 32 volts of rail on the outputs..

Any suggestions where to look next?
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Old 28th August 2012, 04:51 AM   #2
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hello
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Old 28th August 2012, 04:57 AM   #3
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?
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Old 28th August 2012, 06:07 PM   #4
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Anyone have any ideas on where to check?
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Old 28th August 2012, 06:33 PM   #5
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I don't have any technical information on it but you could do some generic troubleshooting.

Rail-rail oscillation on the output transistors?

Audio through all of the preamp op-amps up to the driver IC?
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Old 28th August 2012, 08:26 PM   #6
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Quote:
Originally Posted by S Merlington View Post
This amp powers up but no sound..

I have both + - 15 volts on all op-amps

I also have both + - 32 volts of rail on the outputs..

Any suggestions where to look next?
Are you getting +- 32 vdc on the speaker outputs? If you are the finals are blown.
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