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Hifonics BXI-6000D
Hifonics BXI-6000D
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Old 25th August 2018, 08:28 AM   #171
Achim1409 is offline Achim1409  Germany
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Join Date: Mar 2018
Location: Germany
I have tried my best, but i dont understand why i have such a signal on Pin 1 of irs. The resistors are ok, voltages all ok. Changed Q2 with a new one, but no changes at all. Can it be, that the irs is damaged and change the signal? And why i have only this weak signal on Highside. Can somebody try to explain it for me, that i can understand?
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Old 25th August 2018, 08:38 AM   #172
Perry Babin is offline Perry Babin  United States
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Lift pin 1 and see if the signal on the pad is better/correct.
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Old 25th August 2018, 09:02 AM   #173
Achim1409 is offline Achim1409  Germany
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I lifted pin1, after supply power, it make pffft. I have a short between diode 4 in front of the board. Expect, that the 12Regulator is broken, because now i have 32V on this contacs.
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Old 25th August 2018, 09:34 AM   #174
Achim1409 is offline Achim1409  Germany
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so, i give up. It seems, that both drivers are damaged now. I measured with diode check the black diode in front of the board, there was only 0,04V. On each end of the board is such a diode. Lifted the diode and measured ok. Put back, all voltages are normal.but no more drive signal at all. I will study your tutorial and maybe when i patient enough i will try again.
Thanks a lot for assistance.
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Old 25th August 2018, 09:37 AM   #175
Perry Babin is offline Perry Babin  United States
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I think that IC was already damaged, dragging the signal down. When it failed, it damaged the regulator which damaged the other IC.

I think virtually all of the problems were either due to counterfeit parts or intermittent connections between the main and driver boards.
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Old 25th August 2018, 09:41 AM   #176
Achim1409 is offline Achim1409  Germany
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Join Date: Mar 2018
Location: Germany
yes, thats maybe possible. The driver was this time good one. But with intermittend connection that could be a reason. At the moment iam very frustrated. Other amps ive repaired before was not a big deal, but this hifonics and also the dd z1a seriuosly bring me to my limit. Anyway, iam going to order new parts, and then maybe i will try my luck again.

Even this both amps only for education of my selve. So there is no need to repair them quickly.
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