No only bottom left LED turn on, on all 4 drivers. Top left LED I mesured 0.2 volts and top right LED is at 0 volts.
What is the DC voltage on the top end of the two 10 ohm resistors above pins 1 and 2 of the driver board header?
Broken
Top Left: 40.8V
Bottom Left: 0.065V
Top Right: 0.05V
Bottom Right: 29V and still climbing
Other 3 drivers
Top Left: 42.8V
Bottom Left: 0.05V
Top Right: 0.065V
Bottom Right: 3.3V
Top Left: 40.8V
Bottom Left: 0.065V
Top Right: 0.05V
Bottom Right: 29V and still climbing
Other 3 drivers
Top Left: 42.8V
Bottom Left: 0.05V
Top Right: 0.065V
Bottom Right: 3.3V
It appears that there are multiple defective LEDs. You should have approximately 2v across each LED.
I'm not sure I understood what you meant about the other 3 boards. Do those 3 channels work perfectly?
Are all 3 LEDs lit on all 3 of those boards?
Did you measure the voltages on the driver boards with the amp powered up?
I'm not sure I understood what you meant about the other 3 boards. Do those 3 channels work perfectly?
Are all 3 LEDs lit on all 3 of those boards?
Did you measure the voltages on the driver boards with the amp powered up?
Yeah that there is defective led, I'm still waiting for the new one to come in so I can replace it. Ups delayed the delivery.
The other 3 channel were still working when that channel broke, but I did not test it on the bench to see if it still works, maybe I should.
I was a little confused why I have some defective led on those "working" channel. I have none of those 2 top led working on all 4 drivers board.
When I receive the new led this week I will test if other 3 channel still works, but It was before I opened the amp.
What I was working on is why I have 2 of the A1070 transistors on the "defective" channel become super hot in a second. I found nothing to be shorted or to be defective except for the led right now. I guess I should remove it from the board test it out of the board.
I did measure the voltages with the amp powered up.
In diode test with the multimeter, none of those top LEDs was showing voltage.
The other 3 channel were still working when that channel broke, but I did not test it on the bench to see if it still works, maybe I should.
I was a little confused why I have some defective led on those "working" channel. I have none of those 2 top led working on all 4 drivers board.
When I receive the new led this week I will test if other 3 channel still works, but It was before I opened the amp.
What I was working on is why I have 2 of the A1070 transistors on the "defective" channel become super hot in a second. I found nothing to be shorted or to be defective except for the led right now. I guess I should remove it from the board test it out of the board.
I did measure the voltages with the amp powered up.
In diode test with the multimeter, none of those top LEDs was showing voltage.
Did you clean and re-solder the connections on all of the large 47k resistors (on all channels)?
Yeah I already re-solder the 47k ohm resistors, It didn't help my problem.
Thank you for the schematic
Thank you for the schematic
I just put in new leds but it open instantly. I mesure voltage across both top leds and I mesure 56V and still climbing.
In other baord I mesure 41V.
In other baord I mesure 41V.
Is the voltage on the 47k resistor 56v?
Is the DC voltage on pin 1 and 2 of all of the driver board headers about ±41v?
Do you have a scope?
Is the DC voltage on pin 1 and 2 of all of the driver board headers about ±41v?
Do you have a scope?
