Hello all,
Had a fet blow, replaced the fet and it was still doing the same thing. I have a scope and all tools, but had an incident with a hot air gun.
I was holding my thermal imager over the driver board, noticed a hot spot on it. When I put my finger on that spot, it stopped restarting so I was pulling individual components. Well as you see in the title, I was desoldering components one at a time, and putting them on the component tester, as I was removing the diodes in the back of the board, a capacitor exploded took some of the 0205 components with it, and now I don't know the polarity of the diodes, or the values of the caps/resistors that went to carpet heaven. I can provide pictures of both boards, and am just curious if this is repairable still.
The highlighted area is what suffered the blow up. The large cap in front is what popped. Yes the one on the mainboard is also burned, but it has been replaced since the pic.
Q12, R125, D5, C21, C27, D11, and a few illegible silks. I've never had this happen to me before, and it is a learning exp, but not one I wanted. haha.
Thanks
Had a fet blow, replaced the fet and it was still doing the same thing. I have a scope and all tools, but had an incident with a hot air gun.
I was holding my thermal imager over the driver board, noticed a hot spot on it. When I put my finger on that spot, it stopped restarting so I was pulling individual components. Well as you see in the title, I was desoldering components one at a time, and putting them on the component tester, as I was removing the diodes in the back of the board, a capacitor exploded took some of the 0205 components with it, and now I don't know the polarity of the diodes, or the values of the caps/resistors that went to carpet heaven. I can provide pictures of both boards, and am just curious if this is repairable still.
The highlighted area is what suffered the blow up. The large cap in front is what popped. Yes the one on the mainboard is also burned, but it has been replaced since the pic.
Q12, R125, D5, C21, C27, D11, and a few illegible silks. I've never had this happen to me before, and it is a learning exp, but not one I wanted. haha.
Thanks
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I never found any purpose for a hot air station except to add heat to terminal blocks when removing or installing them.
What other board are you referring to?
What other board are you referring to?
I've used mine quite successfully, almost every other time too. I have done BGA reflows, ps5 repairs etc. This one just screwed me.
Someone else may be able to help directly but I don't have anything on this amp. I was hoping to see something I recognized as being a clone. Does it have any other driver boards?
That 4093 is odd. Confirm that the power supply pins are where they should be. I've seen manufacturers have ICs printed with the wrong part numbers.
If there is no output driver board, post a photo of the driver components for the output stage.
If there is no output driver board, post a photo of the driver components for the output stage.
The 4093 wasn't collateral damage, only the 494, which it could be 180 off, but i probed for ground so I feel good about that... Sorry I'm not sure what the output stage is.
I don't have anything similar but someone likely does. Seeing the IRS2093(?) and two IRS2092s(?) along with the PC817 and the 4093 on the PS board may help someone recognize it as a clone of another amp. Please confirm that the 2092 and 2093 numbers are correct.
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