If I take out the rectifiers, it draws normal, but some amps don't show the problem until they go under load.
A problem with the power supply drive circuit can sometimes be masked if the power supply is regulated. For those, reducing the 12v supply voltage to force the power supply duty cycle to 50% can help determine where the problem is.
If the problem is in the audio circuit, letting it draw current for a few seconds will make the FETs heat up and help determine where the problem is.
If the problem is in the audio circuit, letting it draw current for a few seconds will make the FETs heat up and help determine where the problem is.
Hey Perry
I just replaced all the audio mosfets transistor, and the driver board from a working amp.
now transistors, 201- 205 (irf9640) and 220-224 (irf640n) are getting hot.
I have my power supply set to 9 volts.
I just replaced all the audio mosfets transistor, and the driver board from a working amp.
now transistors, 201- 205 (irf9640) and 220-224 (irf640n) are getting hot.
I have my power supply set to 9 volts.
To clarify...
Lowering the power supply voltage is just for testing the drive circuit for an amp with a regulated power supply. It has nothing to do with the output stage.
Do you have rail-rail oscillation on the output transistors?
Lowering the power supply voltage is just for testing the drive circuit for an amp with a regulated power supply. It has nothing to do with the output stage.
Do you have rail-rail oscillation on the output transistors?
Unrelated question.
Does the riser that you have the amp on in post number 3 have a bottom or is the bottom open?
Does the riser that you have the amp on in post number 3 have a bottom or is the bottom open?
power supply is set to 13.6 volts.
when I apply the remote and with a 1 ohm current limiter resistor, the voltage drops to 8.5 volts, and without
the current limiter it draws the 35 amps of my power supply in 2 seconds, and
b+ drop to 9.2 volts.
when I apply the remote and with a 1 ohm current limiter resistor, the voltage drops to 8.5 volts, and without
the current limiter it draws the 35 amps of my power supply in 2 seconds, and
b+ drop to 9.2 volts.
That sometimes indicates that you have a bad inductor but that would generally cause the FETs on one side of the amp to heat up, not groups diagonally across from each other.
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