Hi guys,
Started again on my amplifier which I already struggle on for a while. I have not worked on this type of class D before.
This amplifier actually has no signs of damage.
The power supply works excellent. The amplifier goes into protect (red light) and then after a second it burps into blue light, almost directly it goes into protect again. This is a constant repeating loop.
Output fets have already been removed once, but it still goes into protect.
Does anyone have a idea?
The power supply always works
The output section seems to not send a PWM wave to the output fets (also with output fets removed it goes into protect)
Started again on my amplifier which I already struggle on for a while. I have not worked on this type of class D before.
This amplifier actually has no signs of damage.
The power supply works excellent. The amplifier goes into protect (red light) and then after a second it burps into blue light, almost directly it goes into protect again. This is a constant repeating loop.
Output fets have already been removed once, but it still goes into protect.
Does anyone have a idea?
The power supply always works
The output section seems to not send a PWM wave to the output fets (also with output fets removed it goes into protect)
Attachments
I have worked allready on this amp.
Found a broken irs driver. And always there is a resistor close to this circuit way out of tolerance. Check the Resistors arround the irs driver, start at the rigth side of the Board ( Seen from your first Picture) I had three Amps, always this side the resitors was damaged.
Found a broken irs driver. And always there is a resistor close to this circuit way out of tolerance. Check the Resistors arround the irs driver, start at the rigth side of the Board ( Seen from your first Picture) I had three Amps, always this side the resitors was damaged.
Achim, an update.
The amplifier has been made.
There was a single 10K resistor which rode 5.6Mohm.
At the 4th bank, right under the IRS chip. This was it.
Thanks for your help!
The amplifier has been made.
There was a single 10K resistor which rode 5.6Mohm.
At the 4th bank, right under the IRS chip. This was it.
Thanks for your help!