Hello diyaudio family
The problem with the device is that the supply stage works normally, but there is no sound at the outputs. I suspect IR2184, but I don't know how to be sure. There is 0.982 volts at the output.
The problem with the device is that the supply stage works normally, but there is no sound at the outputs. I suspect IR2184, but I don't know how to be sure. There is 0.982 volts at the output.
Attachments
DCV measured from pin 3 to pin 5 of the 2184?
If you drive a strong signal into the amp, do you see a square wave on pin 1 (10v amplitude, driving up from the negative rail)?
Black probe on pin 3 of the 2184, DCV on pin 2?
If you drive a strong signal into the amp, do you see a square wave on pin 1 (10v amplitude, driving up from the negative rail)?
Black probe on pin 3 of the 2184, DCV on pin 2?
Any component look burned, damaged or broken? Is power drain reasonable? Has it a warning/alarm/error led?
pin3 black probe pin5 measured 12volt
Unfortunately I don't have an oscilloscope
pin3 black probe pin2 no dcv
Unfortunately I don't have an oscilloscope
pin3 black probe pin2 no dcv
Re-phrase #5.
If you have 0v on pin 2, the amp may be in protection mode.
OK. Black on pin 3, red on pin 1, DCV? This is while driving a strong signal into the amp.
If you have 0v on pin 2, the amp may be in protection mode.
OK. Black on pin 3, red on pin 1, DCV? This is while driving a strong signal into the amp.
Nothing happens? Does that mean that the voltage remains at 0.982v?
3w 3.3k?
Output at the speaker terminals?
You need to provide more details, not try to shorthand the information.
3w 3.3k?
Output at the speaker terminals?
You need to provide more details, not try to shorthand the information.
Yes, even though the RCA is connected, nothing happens. It remains at 0.982 volts. When I connect the speaker, there is no sound. As I said, when I remove one leg of the 3.3k resistor, this time the output voltage becomes 18 volts, an interesting situation.
What 3.3k resistor?
When you connect a speaker, does the voltage across the speaker terminals remain at 0.982v?
If yuou touch a load or a speaker across the output when at 18v, does the voltage remain at 18v?
When you connect a speaker, does the voltage across the speaker terminals remain at 0.982v?
If yuou touch a load or a speaker across the output when at 18v, does the voltage remain at 18v?
I put the resistor leg back and even though I disabled the IR2184, the output voltage is constant at 0.982 volts.
The big resistance at the top of the picture I took
Yes, if I connect it to the speaker, the voltage remains constant.
Yes, if I connect it to the speaker, the voltage remains constant.
What is the DCV from gate to source for each bank of output FETs?
Did you say previously that you disabled the 2184? How? By shorting pins 2 and 3?
Why did you disable it?
Do you possibly have a capacitor in series with your speaker?
Did you say previously that you disabled the 2184? How? By shorting pins 2 and 3?
Why did you disable it?
Do you possibly have a capacitor in series with your speaker?
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0.982 volts coming out of the lo pin of IR2184
the dcv at the output is the same
There is 0.982 volts on the gate leg of the irfp250n, the mosfets are not driven
the dcv at the output is the same
There is 0.982 volts on the gate leg of the irfp250n, the mosfets are not driven
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0 dcv from gate to source for each output fet bank
I disassembled the 2184 completely, not by short-circuiting pins 2 and 3.
The reason I disabled it is to find out if there will be a change in the 0.982 volts at the output.
I don't have a capacitor in series with my speakers.
I disassembled the 2184 completely, not by short-circuiting pins 2 and 3.
The reason I disabled it is to find out if there will be a change in the 0.982 volts at the output.
I don't have a capacitor in series with my speakers.
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