Hi everyone!
About 6 or 7 years ago I bought 2 Brutus 2400.1D amplifiers for a project but only one of them was ever used, however due to an unlucky water leak in the car it shorted out and burned out several transistors. However while repairing it I decided to dust off the other amp, said and done I installed it in the car but when I fired the stereo up I got a loud thump from the sub after about 4-5 seconds (no music) and when I went to the trunk I found my dear sub locked in the bottom and the amp was in protect. Removed the amp from the car again and tried firing it up with only power wires and it fires up fine but the relays click back to off immediately after clicking on and amp goes into protect.
I have opened it up and am unable to find anything wrong with any power/output transistors, there is no apparent visual damage and it smells new still. I'm quite unsure where to start looking right now, any suggestions where to start?
About 6 or 7 years ago I bought 2 Brutus 2400.1D amplifiers for a project but only one of them was ever used, however due to an unlucky water leak in the car it shorted out and burned out several transistors. However while repairing it I decided to dust off the other amp, said and done I installed it in the car but when I fired the stereo up I got a loud thump from the sub after about 4-5 seconds (no music) and when I went to the trunk I found my dear sub locked in the bottom and the amp was in protect. Removed the amp from the car again and tried firing it up with only power wires and it fires up fine but the relays click back to off immediately after clicking on and amp goes into protect.
I have opened it up and am unable to find anything wrong with any power/output transistors, there is no apparent visual damage and it smells new still. I'm quite unsure where to start looking right now, any suggestions where to start?
Post a good quality photo of the component side of the entire main board and the component side of any driver boards if no one can help.
Thanks for your reply! I've tried to take some good pictures but it's kind of hard to reach, and apparently the images are too big so i have to shrink them. But i hope you can see something.
Attachments
Here are some measurements on the 38N30, the IRFP064N are coming
Ohms D>S S>G G>S
IRF 1 5,25K 24,58K 24,87K
IRF 2 5,25K 24,63K 24,86K
IRF 3 5,25K 24,58K 24,87K
IRF 4 5,25K 24,59K 24,88K
IRF 5 5,25K 24,57K 24,88K
IRF 6 5,25K 24,59K 24,87K
IRF 7 5,25K 24,58K 24,87K
IRF 8 5,25K 24,61K 24,86K
Multimeter on Diode, probe 3,159v
S>D S>G G>S
IRF 1 ,464v ,630v 1,960v
IRF 2 ,461v ,555v 1,210v
IRF 3 ,464v ,630v 1,960v
IRF 4 ,460v ,555v 1,210v
IRF 5 ,463v ,630v 1,960v
IRF 6 ,461v ,555v 1,210v
IRF 7 ,463v ,630v 1,960v
IRF 8 ,461v ,555v 1,210v
Ohms D>S S>G G>S
IRF 1 5,25K 24,58K 24,87K
IRF 2 5,25K 24,63K 24,86K
IRF 3 5,25K 24,58K 24,87K
IRF 4 5,25K 24,59K 24,88K
IRF 5 5,25K 24,57K 24,88K
IRF 6 5,25K 24,59K 24,87K
IRF 7 5,25K 24,58K 24,87K
IRF 8 5,25K 24,61K 24,86K
Multimeter on Diode, probe 3,159v
S>D S>G G>S
IRF 1 ,464v ,630v 1,960v
IRF 2 ,461v ,555v 1,210v
IRF 3 ,464v ,630v 1,960v
IRF 4 ,460v ,555v 1,210v
IRF 5 ,463v ,630v 1,960v
IRF 6 ,461v ,555v 1,210v
IRF 7 ,463v ,630v 1,960v
IRF 8 ,461v ,555v 1,210v
Are the power supply FETs in the circuit?
Do you have positive and negative rail voltage?
Do you have positive and negative regulated voltage on the power supply pins of the op-amps?
Do you have positive and negative rail voltage?
Do you have positive and negative regulated voltage on the power supply pins of the op-amps?