Good driver
1: 44.8V
2: -45.2V
3: 4V
4: 1.4V
5: 0V
6: 0V
7: 0.8V
8: -3.9V
9: -1.4V
10: 0V
11: 0V
12: -3.3V
13: 3.4V
14: 0V
15: -28.2V
16:-0V
17: -24-8V
18: 0V
19: 0V
20: 0.149V
1: 44.8V
2: -45.2V
3: 4V
4: 1.4V
5: 0V
6: 0V
7: 0.8V
8: -3.9V
9: -1.4V
10: 0V
11: 0V
12: -3.3V
13: 3.4V
14: 0V
15: -28.2V
16:-0V
17: -24-8V
18: 0V
19: 0V
20: 0.149V
It's odd that you see 56v when there is nothing greater than 45v on the header.
Switch to ACv and see if the meter reads anything.
Initially, didn't you have only one bad channel (3 playing)?
Switch to ACv and see if the meter reads anything.
Initially, didn't you have only one bad channel (3 playing)?
You need to use ground for the reference. If you're not using ground, you need to make a note of it.
Using ground, what is the voltage on the point where you read 56v?
Using ground, what is the voltage on the point where you read 56v?
I did have 29V that day, but since the 2 transistor that become hot are not heating hot anymore I have negative voltage there.
I can't find what has changed.
Yeah sorry ,I tought it was clear, english is not my first language.
Top 2 LEDs:
Top Left: 41.8V
Bottom Left:0
Top Right:0
Bottom Right:-10.5V
47K resistors are cold to the touch, but i can feel some heat from 3 functionals channels.
I tested it again and it look like none of the channel work.
I tested it again and it look like none of the channel work.
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If I test correctly (I forgot to connect the rca cable) 3 channels work even with tops LEDs open
In the output of the broken channel I mesure 10.35 DC volt.
For the bad driver board, what is the voltage on the 3 terminals of each of the two KTA1070 transistors nearest the two series connected LEDs. Post the exact voltage on the meter (no rounding).
