Just repaired one side of the PS, IRFZ48N units. All other parts checking out all OK. Put the amp back in the sync, which takes a minutes, and it powers with 1.4A idle draw. ~98vDC rail. Everything else seems to be checking out OK, but no audio.
Power is Green.
Music is Green, I'm not sure if this is right since there is no audio connected.
Protection light blinking red which I understand may be an RCA shield problem.
RCA shields are directly connected to non-bridging speaker terminals.
RCA shields to amp ground is about 14kohms
Powered, there is no DC across speaker terminals.
Powered, referencing amp B- theres 0.74vDC on speaker terminals.
Is there a SM floating around?
Power is Green.
Music is Green, I'm not sure if this is right since there is no audio connected.
Protection light blinking red which I understand may be an RCA shield problem.
RCA shields are directly connected to non-bridging speaker terminals.
RCA shields to amp ground is about 14kohms
Powered, there is no DC across speaker terminals.
Powered, referencing amp B- theres 0.74vDC on speaker terminals.
Is there a SM floating around?
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No.
I take some of what I said back. The amp DOES play even with the protection light blinking.
When I ground RCA shields to amp -B then protection light goes green and the amp still plays. So; its just the way this PS is - not connected to RCA shields on this smaller supply. On my larger bench PS setup the RCA shields DO have a good reference to ground. Its just my Gophert 1620 and head unit are separate. Usually its not much of an issue though cause the small supply is only for mild rebuild and small tests.
So I think this amp may be OK. I'll move to further testing unless I am wrong?
I take some of what I said back. The amp DOES play even with the protection light blinking.
When I ground RCA shields to amp -B then protection light goes green and the amp still plays. So; its just the way this PS is - not connected to RCA shields on this smaller supply. On my larger bench PS setup the RCA shields DO have a good reference to ground. Its just my Gophert 1620 and head unit are separate. Usually its not much of an issue though cause the small supply is only for mild rebuild and small tests.
So I think this amp may be OK. I'll move to further testing unless I am wrong?