Hello, received this amp, blown output.
Removed all fets, installed new drivers, checked everything, seems ok.
Gate Signal on low side also ok.
Mounted new fets, it blows some fets directly.
Removed all fets again, new drivers, and checked with two fets, bank by bank. One side ok, if i mounted the fets on the other side, directly all drivers blown again.
Removed fets and drive board again.
Checked the pins on the mainboard for the drive board. I have a saw tooth on pin 1, 10, and the 3.rd row, Pin 2 and 29.
I dont know what happened here
Removed all fets, installed new drivers, checked everything, seems ok.
Gate Signal on low side also ok.
Mounted new fets, it blows some fets directly.
Removed all fets again, new drivers, and checked with two fets, bank by bank. One side ok, if i mounted the fets on the other side, directly all drivers blown again.
Removed fets and drive board again.
Checked the pins on the mainboard for the drive board. I have a saw tooth on pin 1, 10, and the 3.rd row, Pin 2 and 29.
I dont know what happened here
Achim1409 Ground Zero GZPA 1.8K HC Hello, received this amp, blown output. Removed all fets, installed new drivers, checked everything, seems ok. Gate Signal on low side also ok. Mounted new fets, it blows some fets directly. Removed all fets again, new drivers, and checked with two fets, bank by bank. One side ok, if i mounted the fets on the other side, directly all drivers blown again. Removed fets and drive board again. Checked the pins on the mainboard for the drive board. I have a saw tooth on pin 1, 10, and the 3.rd row, Pin 2 and 29. I dont know what happened here Posting Rules
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Yes, drive signals are there. I have no diagram, but its nearly the same as a DD Z1a or AQ..
Checked the voltages on Row 1 and 3... Voltages are roughly:
1: Mute
2: -130V
3: -150V
4: 0
5: 0
6: -150V
7:0
8:0
9: -150V
10: Mute
11: -150V
Row2:
1: -150V
2: Mute
3: -130V
4: -150V
5: 0
6: 0
7: -150V
8: 0
9: 0
10: -150V
11: Mute
Ground on sec. center
I think its ok..
Amplitude for low side was ok on each Bank. Resistors ok...
Checked the voltages on Row 1 and 3... Voltages are roughly:
1: Mute
2: -130V
3: -150V
4: 0
5: 0
6: -150V
7:0
8:0
9: -150V
10: Mute
11: -150V
Row2:
1: -150V
2: Mute
3: -130V
4: -150V
5: 0
6: 0
7: -150V
8: 0
9: 0
10: -150V
11: Mute
Ground on sec. center
I think its ok..
Amplitude for low side was ok on each Bank. Resistors ok...
Last month i had shorted inductor in a similar amp. And it was visible only when i've pulled both of them and looked up closely at them from the bottom. There was no way to see it when they were being installed.
One of them was shorting and caused similar issues as You have described here.
One of them was shorting and caused similar issues as You have described here.
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