Thanks for another awesome video. It takes a man to admit his mistakes. Especially to air them on UA-cam. I can’t tell you how many easy faults I missed when trying to hurry through a repair because I think I’ve seen it before. It always bites you. Humility is a great trait! Hope you’re doing well, Todd.
Hello, thank you for always replying to my comments In a video, I asked to explain the class D circuit and you sent a link that I looked at. Thank you I want it to teach different parts of a class D circuit on the board. For example, the same device or something similar. Is it possible to tell the different parts and their functions, for example, what do these inductors and capacitors do? Or where and by which component is the triangular waveform produced that is compared with the input signal? Where should we find the gate drive, etc... Of course, it doesn't matter which board it is, my goal is to know the different parts of class D. Thank you very much for taking the time to read my comment
The best way to start learning that is to have a schematic and start at the pre-amp working your way to the output ICs understanding what each component does along the way. Most datasheets will give you an application example so you can learn how the topology works.
Hi, how are you? I'm new to amplifier repair. I have a question, depending on the circuit of a class D amplifier, these may have different GND. I use an oscilloscope that connects via USB to the PC. When I try to see the gate signal, I have strange readings from a side but the other is normal by taking the GND from where GND is supposed to be
Hi and thank you for the support. I don't know when it comes to the USB scope how they reference the probe's ground. My scope ground is always attached to the amplifier ground terminal.
Hi my 8k blew right where you said the resistance was 11.2 on the 15v diode How much do you normally charge for replacement and whatever else you come across
Hello! Sorry I don't post prices here but you can always contact me during business hours at www.ellensburgamplifier.com at the bottom of each page is the contact info. You can also submit the form at www.ellensburgamplifier.com/request-a-quote for more information.
Hi Ed, i got my bass8k in to protect today due to voltage getting down.i have checked all mosfets they are look ok and tested by multimeter on source all 3 legs.also checked diodes and low voktace ic drive also working.what is the problem what to dig out esle?
@@ellensburgamplifier hi Ed.thank you for reply.i have measured 10.7k for low side and 11.1k for upper side.the same from opposite side.what to test else?
@@basshead100 Hello! As to not confuse people my name is Todd :) sorry I missed that earlier. You will want to put the amplifier output section into shutdown by removing the SD solder bridge. This will allow you to see what the pre-amp is doing and make sure you have your square wave signal to both Si8244 ICs from the 319 IC. You are reaching a point where it will be hard to assist through comments.
@@ellensburgamplifier sorry Todd)i jsut observed that when i disconnect my speaker wires protection mode disappers at all and in switching to functioning mode blue light,but for curiosity i have measured voltage coming out from speakers output nozzle it shows 23.4v but to supposed to be 0.0v at volume down regime.
@@basshead100 Oh you have DC offset. Anything up to .05v is acceptable. I would first check the DC offset circuit as sometimes (in lucky situations) a brief output short that doesn't damage the drive will damage the DC offset resistors. Otherwise, I would replace the Si8244 ICs and go from there.
Hi my 8k blew right where you said the resistance was 11.2 on the 15v diode How much do you normally charge for replacement and whatever else you come across
Thanks for another awesome video. It takes a man to admit his mistakes. Especially to air them on UA-cam. I can’t tell you how many easy faults I missed when trying to hurry through a repair because I think I’ve seen it before. It always bites you. Humility is a great trait! Hope you’re doing well, Todd.
Thank you! I think I find that I can get ahead of myself and overlook things. Stay well!
I always check all 3 legs on all fets for shorts, & solder bridges after I work on a board before applying power.
Indeed! It is something I always forget to check as it is a rare occurrence to have a non-visible drain/source short @ 180 volts.
Hello, thank you for always replying to my comments
In a video, I asked to explain the class D circuit and you sent a link that I looked at. Thank you
I want it to teach different parts of a class D circuit on the board. For example, the same device or something similar. Is it possible to tell the different parts and their functions, for example, what do these inductors and capacitors do? Or where and by which component is the triangular waveform produced that is compared with the input signal? Where should we find the gate drive, etc... Of course, it doesn't matter which board it is, my goal is to know the different parts of class D.
Thank you very much for taking the time to read my comment
The best way to start learning that is to have a schematic and start at the pre-amp working your way to the output ICs understanding what each component does along the way. Most datasheets will give you an application example so you can learn how the topology works.
@@ellensburgamplifier thank you very ❤️❤️🙏🙏❤️
Hi, how are you? I'm new to amplifier repair. I have a question, depending on the circuit of a class D amplifier, these may have different GND. I use an oscilloscope that connects via USB to the PC. When I try to see the gate signal, I have strange readings from a side but the other is normal by taking the GND from where GND is supposed to be
Hi and thank you for the support. I don't know when it comes to the USB scope how they reference the probe's ground. My scope ground is always attached to the amplifier ground terminal.
💯💯💯...
Hi my 8k blew right where you said the resistance was 11.2 on the 15v diode
How much do you normally charge for replacement and whatever else you come across
Hello! Sorry I don't post prices here but you can always contact me during business hours at www.ellensburgamplifier.com at the bottom of each page is the contact info. You can also submit the form at www.ellensburgamplifier.com/request-a-quote for more information.
Hi Ed, i got my bass8k in to protect today due to voltage getting down.i have checked all mosfets they are look ok and tested by multimeter on source all 3 legs.also checked diodes and low voktace ic drive also working.what is the problem what to dig out esle?
What is the resistance from the gate to source of the output transistors? There are 4 sections, 2- high side, and 2 low side.
@@ellensburgamplifier hi Ed.thank you for reply.i have measured 10.7k for low side and 11.1k for upper side.the same from opposite side.what to test else?
@@basshead100 Hello! As to not confuse people my name is Todd :) sorry I missed that earlier. You will want to put the amplifier output section into shutdown by removing the SD solder bridge. This will allow you to see what the pre-amp is doing and make sure you have your square wave signal to both Si8244 ICs from the 319 IC. You are reaching a point where it will be hard to assist through comments.
@@ellensburgamplifier sorry Todd)i jsut observed that when i disconnect my speaker wires protection mode disappers at all and in switching to functioning mode blue light,but for curiosity i have measured voltage coming out from speakers output nozzle it shows 23.4v but to supposed to be 0.0v at volume down regime.
@@basshead100 Oh you have DC offset. Anything up to .05v is acceptable. I would first check the DC offset circuit as sometimes (in lucky situations) a brief output short that doesn't damage the drive will damage the DC offset resistors. Otherwise, I would replace the Si8244 ICs and go from there.
Hello can you send me the link how I can all of the mosfets for de taramp smart 5k
Hello, are you looking for where to buy them?
@@ellensburgamplifier yes I im I have a smart 5k I want to repair, the output part
My smart 3k all of a sudden started going into low voltage protection when I turn it up voltage is 14.2 at amp have you seen this before?
Can you fix a amp for me what would you charge?
www.ellensburgamplifier.com is where all information is updated. The FAQ page covers a majority of amplifiers we do not service.
Is it possible to send a amplifier to you for repair?
Depending on what amplifier it is you bet! www.ellensburgamplifier.com/request-a-quote is the first step.
Thank you for the reply! I will go to the website you posted as soon as I'm able to for the quote have a good day
Hi my 8k blew right where you said the resistance was 11.2 on the 15v diode
How much do you normally charge for replacement and whatever else you come across