Im having an issue with audio on this amplifier. Missing the negative voltage on the op amps. Power supply is up and running and the outputs are ok. It was missing R547 when I received it, and had alot of terrible sodering work. I managed to get the power supply back working and installed a 5watt 10ohm in r547 for testing, I ordered the correct resistors. I could use some help, I don't have a good understanding of these amplifiers.
Other than 2 and 7, those look OK. I think 2 is just for the power LED. 7 is the -15v for muting but that won't be there if the low-voltage supply isn't working.
Is the power LED lit?
It looked like the main supply was operating since it had 80v. Is the main supply operating?
Is the power LED lit?
It looked like the main supply was operating since it had 80v. Is the main supply operating?
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