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Hi All,
I'm new to the forum. I have a RCF ART 310A powered speaker with a varying negative dc voltage on the bass amp output. The red protect LED is on. The output from the SAP 16 darlington pair varies from -0.01v up to about -1v. When the power supply is switched off the voltage at the output goes up to -40v. I replaced the SAP 16N which made no difference.The supply rails seem fine +/- 40v and +/- 12v. The + input to U15 (BA4560 Op amp) has a negative varying voltage up to about 0.05v.
I would grateful if anyone would have any idea as to what may be the cause of the problem.
I'm new to the forum. I have a RCF ART 310A powered speaker with a varying negative dc voltage on the bass amp output. The red protect LED is on. The output from the SAP 16 darlington pair varies from -0.01v up to about -1v. When the power supply is switched off the voltage at the output goes up to -40v. I replaced the SAP 16N which made no difference.The supply rails seem fine +/- 40v and +/- 12v. The + input to U15 (BA4560 Op amp) has a negative varying voltage up to about 0.05v.
I would grateful if anyone would have any idea as to what may be the cause of the problem.