Hello Guys I have a big problem with the PWM driver card of my EMPHASER 15000D I have in the lab.
I removed all the output transistors and audio amplifier turns on but if you control the square wave, with no oscilloscope can not stop to see it well.
I tried to set the trigger of my oscilloscope but I can not stop, it moves too.
After a while I tried to check out, broke 1 IRS21844 driver and I have removed the driver card and I changed them every 4 drivers.
I put the whole board but nothing changes both on but I can not stop and see well the Quadra wave.
What can I check on the board?
I saw that there is a SMD transistor wrote MAX26, but what is?
I await your help thanks.
I am attaching a picture of the board
I removed all the output transistors and audio amplifier turns on but if you control the square wave, with no oscilloscope can not stop to see it well.
I tried to set the trigger of my oscilloscope but I can not stop, it moves too.
After a while I tried to check out, broke 1 IRS21844 driver and I have removed the driver card and I changed them every 4 drivers.
I put the whole board but nothing changes both on but I can not stop and see well the Quadra wave.
What can I check on the board?
I saw that there is a SMD transistor wrote MAX26, but what is?
I await your help thanks.
I am attaching a picture of the board
The amp is probably self-oscillating, which means it changes the frequency as needed. And that would mean you won't see a fixed frequency.
It looks like you've ripped out a lot of the contact-through points. If you can't get it lose or don't have anything to de-solder it, try another way: Snip off the wires, and the plastic spacers. That way you can take out the board without any damage and you can then solder the pins out separately - which is so much easier and goes almost every time without any damage even with bad tools.
It looks like you've ripped out a lot of the contact-through points. If you can't get it lose or don't have anything to de-solder it, try another way: Snip off the wires, and the plastic spacers. That way you can take out the board without any damage and you can then solder the pins out separately - which is so much easier and goes almost every time without any damage even with bad tools.
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