Here is what o get on all 4 banks for the power supply fets .
Scope set to 5us 5volts/div
0.1 cap connected between gate and source
Do these appear to be good or do I have bad drivers ?
Scope set to 5us 5volts/div
0.1 cap connected between gate and source
Do these appear to be good or do I have bad drivers ?
Attachments
They look OK.
Install 1 FET per bank and twist the transformers to check for intermittent problems.
Install 1 FET per bank and twist the transformers to check for intermittent problems.
The guy said the problem is the amp will power up and idle fine without rcas plugged into the amp .
He said if he plugs in rcas to the amp it will never power up and just go straight into protection .
He kept trying to power the amp up when it would go into protection and in return the amp blew the power supply . At least this is what he said .
Any ideas on why the amp would protect with the rcas plugged In ?
He said if he plugs in rcas to the amp it will never power up and just go straight into protection .
He kept trying to power the amp up when it would go into protection and in return the amp blew the power supply . At least this is what he said .
Any ideas on why the amp would protect with the rcas plugged In ?
A shorted transformer driving DC to the shields may be able to cause the amp to go into protection.
With only B+ and ground connected, touch your scope probe to the RCA shields and twist the transformers to see if the trace ever deflects from the reference (scope set to DC coupling, timebase set to 2ms/div, and the vertical amplifier set to 5v/div) .
With only B+ and ground connected, touch your scope probe to the RCA shields and twist the transformers to see if the trace ever deflects from the reference (scope set to DC coupling, timebase set to 2ms/div, and the vertical amplifier set to 5v/div) .
Trace deflects from reference line but barley any at all .
I test it with my meter also and get 0.23 volts on the rca shields
I test it with my meter also and get 0.23 volts on the rca shields
Do you see any problems when you plug in RCAs and drive signal into the amp.
Did you check the RCA shield ground on his head unit?
Did you check the RCA shield ground on his head unit?
I don’t see any problems .
I asked him again and he said this is the 2nd amp of his that’s done the same thing .
He checked the rca ground shield on head unit in his car and said it was fine it measures 0.6 ohms from shield to case .
He replaced the rca cables but the problem is still there .
Not sure what else to check since the problem still exists.
Amp will power up until rcas are plugged in and straight into protection mode .
The Car that the system is in has done the same thing to 2 different amps head unit checks ok and new rca cables
I asked him again and he said this is the 2nd amp of his that’s done the same thing .
He checked the rca ground shield on head unit in his car and said it was fine it measures 0.6 ohms from shield to case .
He replaced the rca cables but the problem is still there .
Not sure what else to check since the problem still exists.
Amp will power up until rcas are plugged in and straight into protection mode .
The Car that the system is in has done the same thing to 2 different amps head unit checks ok and new rca cables
When you reinstall it in the vehicle, use a smaller fuse. Confirm that it will power up with a 15-20 amp fuse on the bench. Use the same fuse in the vehicle to help protect the amp while troubleshooting.