Good afternoon, sorry friends, now I'm looking for help to get this amplifier going, I've already checked the output fets and the driver transistors and they're fine, when I try to turn it on I only see this, I hope I can. help greetings.
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It stays on even with the driver card, but I don't see the high and low side pulses. The fets get hot and there is a high current draw.
Can you power it up long enough to measure the DC voltage from the gate to source on the heating FETs?
As a side note, using a footswitch to switch remote voltage is very handy in situations like this. It allows quick switching and frees your hand for the meter. Using small clips on your probes also works but is a bit slower.
As a side note, using a footswitch to switch remote voltage is very handy in situations like this. It allows quick switching and frees your hand for the meter. Using small clips on your probes also works but is a bit slower.
of course in the banks of irf9640 there is 3.2v and in those of irf640n there is only 0.234v and it varies downwards
Do the transistors heat up without the driver board?
Does this driver board have pluggable headers or is it soldered in?
Does this driver board have pluggable headers or is it soldered in?
without the card they do not show voltage in any bank, they do not heat and the plate is removable, good morning
Without the driver board in the amp, confirm that you read 0 v across the gate and drain of all output FETs.
Confirm that all of the 470 ohm SMD resistors near the driver transistors on the driver board are within tolerance.
Confirm that none of the large Zener diodes on the driver board are shorted (or read low resistance).
Confirm that all of the 470 ohm SMD resistors near the driver transistors on the driver board are within tolerance.
Confirm that none of the large Zener diodes on the driver board are shorted (or read low resistance).
hello mr perry! I have already achieved that it will oscillate correctly, I changed the tl072c, lm211 and the resistance with a rare value, I put a 120 ohms one on it and as for the operational tl072c I knew that it was that and not the 071c due to its power supply, I thank you in advance for your support
What does the output of the TL072 on the driver board look like?
Is it distorted at a lower output level?
Is it distorted at a lower output level?
In this case, it is a tl072c that is used on this board, how do I know where it goes? in u2 or u3? Good morning
