Help with Hifonics Brutus BXi1600D that does not power up - diyAudio
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Old 6th August 2012, 12:30 PM   #1
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Default Help with Hifonics Brutus BXi1600D that does not power up

Hi all,
Im German and i have a problem with the same Amplifier. The Red Power LED.
Its the Hifonics Brutus BXi1600D.
For testing i have a Batteryloader 12v and i connected the Amp.. So i can switch on. After two or three seconds of time they do a "click" an the Power LED is red...
All pieces in the Amp lookung good, but there is a white ceramic piece( 5w33ohmJ)looks a little bit brown or blown...
maybe this piece is broken.....

i can take a photo for help if someone want to help me.

Thank you

Sry for the bad English...
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Old 7th August 2012, 01:02 PM   #2
Mooly is offline Mooly  United Kingdom
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Have you checked the 33 ohm resistor ? It can sometimes be hard to tell if it 33 ohm or 0.33 ohm if the markings are burned.
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Old 7th August 2012, 01:05 PM   #3
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The measuning Device shows 33,0 if i check the resistor
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Old 7th August 2012, 01:21 PM   #4
Mooly is offline Mooly  United Kingdom
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That is pretty conclusive that it is OK and correct at 33 ohm.

These are quite a complex piece of electronics. You really need to have the full circuit diagram available and start a methodical test procedure.

Most of the problems seem to be related to the power devices and rectifiers and their drive. Even if you find something like a shorted FET there could be other components or a primary reason why it has failed.
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Old 7th August 2012, 01:35 PM   #5
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OK. I dont have the circuit diagram and it is not possible to get these from Hifonics... So i think i must check every parts...
I think i will begin with the Mosfets....
They have 3 legs.. on the fets can i read f1 G31 FQP65N06
Can someone tell me which way i can check these Parts. there are 6 on every side of zhe Amp
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Old 7th August 2012, 02:15 PM   #6
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If the protect LED is lit, the amp likely has shorted output transistors.

You should not read anything near 0 ohms between the legs of any individual transistor, no matter the probe orientation.

Post a photo of the inside of the amp.
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Old 7th August 2012, 02:32 PM   #7
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Click the image to open in full size.Pic-Upload.de - IMGP1284.jpg
Click the image to open in full size.Pic-Upload.de - IMGP1283.jpg
Click the image to open in full size.http://www.pic-upload.de/view-154902...P1282.jpg.html
Click the image to open in full size.Pic-Upload.de - IMGP1281.jpg

Last edited by Mrtraffic; 7th August 2012 at 02:34 PM.
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