The amp builds full rail voltage .
I also noticed now that if I connect a test sub to the amp the amp will remain on but you can hear the test sub pop when the relays engage
I also noticed now that if I connect a test sub to the amp the amp will remain on but you can hear the test sub pop when the relays engage
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Is one terminal on each of the output filter inductors easily removable to allow you to try to isolate the source of the DC?
I’m just gonna rebuild another amp to use at this point . This amp is nothing but issues .
I found the problem it had a bad cap on location C208 in the output section .
Replaced the cap and now the drivers for the power supply just started smoking and blowing fets
I found the problem it had a bad cap on location C208 in the output section .
Replaced the cap and now the drivers for the power supply just started smoking and blowing fets
On the diagrams I have for the 4-IC driver board amps has C208 as a cap between the positive and negative rails and could not have driven DC to the outputs.
If you ever rebuild this amp, start with low-voltage rails to confirm operation before going to full rail voltage.
If you ever rebuild this amp, start with low-voltage rails to confirm operation before going to full rail voltage.
I noticed this resistors gets to hot to touch within 10 secs of just the power supply board being powered up and that’s what I seen smoking earlier .
Any ideas what might cause this ?
Any ideas what might cause this ?
That appears to be the resistor and capacitor that connect the primary and secondary grounds.
Do you have anything other than a clean 0v DC on the secondary ground?
Do you have anything other than a clean 0v DC on the secondary ground?
Is the voltage that you see, the same as the rail voltage?
Do you have an incandescent lamp that you can put in place of the resistor? Low wattage would be better.
Do you have an incandescent lamp that you can put in place of the resistor? Low wattage would be better.
Yes the voltage is the same as the rail voltage . And I will have to see if I have a bulb if not I will have to go get one in the morning
Don't worry about it if you don't have one. I wanted it to stabilize the secondary.
Do you read low resistance between the secondary ground and the rail voltage?
Do you read low resistance between the secondary ground and the rail voltage?
The problem may be a solder bridge, or possibly another bad capacitor.
I'd disable the drive stage while troubleshooting.
I'd disable the drive stage while troubleshooting.
I guess I’m tearing back into this amp I won’t let it defeat me .
First things first I gotta figure out why that resistor burns . I will check for a bad cap,solder bridge, broken vias
First things first I gotta figure out why that resistor burns . I will check for a bad cap,solder bridge, broken vias