OlHorizontal
New Member
Was hoping someone could help me with a question on the CR-1020
I'm having trouble understanding the schematic for the power supply on the CR-1020. The grey wire, which is circled in the picture, looks like it is supposed to be -91V, however I only see -45V on mine when I disconnect it from the amp boards. I think this is related to a problem on the amp boards where both go to a huge 17V DC offset. The amp was working before I re-capped the protection and power supply, and I am able to get it to come out of protection if I remove the +B fuses on both boards. So I think the protection circuit is doing its job.
I can troubleshoot the amp boards but was not sure what voltage the grey wire should be, since -91V doesn't make sense to me looking at it
I'm having trouble understanding the schematic for the power supply on the CR-1020. The grey wire, which is circled in the picture, looks like it is supposed to be -91V, however I only see -45V on mine when I disconnect it from the amp boards. I think this is related to a problem on the amp boards where both go to a huge 17V DC offset. The amp was working before I re-capped the protection and power supply, and I am able to get it to come out of protection if I remove the +B fuses on both boards. So I think the protection circuit is doing its job.
I can troubleshoot the amp boards but was not sure what voltage the grey wire should be, since -91V doesn't make sense to me looking at it