Question about Hifonics Brutus BX 1605D Car Audio Amplifier

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Hifonisc bx 1605d

Well the amp sent its main output stage to its line out stage. it smoked and burned up. i can see all the blown components there is three resistors and a vouple of transistors. all on the output stage. can i just replace these transistors and resistors.

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I think you could but before doing that did the amp itself send the output to the line if it did then replacing the parts would be pointless. if it was a hook up problem then replace parts and don't let it happen again

Posted on Dec 15, 2007

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I had my boss 2400 watt 2 channel amp hooked up in my car. I had one sub on each channel and one of my subs blew. I unhooked the positive speaker wire on the blown sub, everything was fine. Driving down...


If your amp started smoking, probably not. Due to your description, did the other sub really blow? I would hook it up to another amp to test it. It may have been a channel in your amp. As for repairing the amp, the parts and labor to repair will probably cost you more that to just replace the amp.

Sep 06, 2011 | Boss Car Audio & Video

1 Answer

Screen Doesn't Appear, power comes on but NO Picture,pls help


There are several possibilities that come to my mind about this problem.

Firstly, most problems come down to power, or rather a lack of - because of a component breakdown.

1]...It may sound obvious, but there could be a problem with the unit's internal power supply module that regulates the supply to the HT (High Tension) side of the circuit; It could be
a]...a transistor;
b]...diode;
c]...safety resistor;
d]...Or, but unlikely, a fuse.

this is the part of the main board that contains the line output transistors, line output transformer (LOPT) etc, & supplies the extremely high voltage (typically thousands of volts) to the crt (Cathode Ray Tube).

2]...It could be the line output transistor, or another component - such as a safety resistor - in the line out stage.
The line output transistor would be located on the heatsink, very close to the LOPT.

3]...It could also be the line output transformer;
a]...My first check for this would be for dry solder joints on the LOPT, on the underside of the main board.

I must stress, as a retired tv engineer myself, there are very dangerous voltages inside television sets, & I talk from experience - I've had some nasty shocks in my time, & it only takes a few milliamps of current to kill you, if it goes through your chest (Up one arm & down the other).

Even after a tv has been unplugged from the power socket, on the wall, it can contain dangerously high & possibly fatal voltages.

So please, DO NOT attempt this repair yourself, unless you are qualified to do so; either ask someone who you know, who is qualified, or take it to the tv repair shop.

I hope this has been of help to you.

Thanks,
Steve.

Oct 01, 2010 | Televison & Video

1 Answer

I have a SPL phantom dk-3400 car amp and when i


Even withou the help of any diagram you have a visual indication. Look inside to the area of the burn. identify the component. check around the burned area for the cause of the burn. it could be the failue of the output or the power side. equipped with a multimeter you must be able to identtify stage by stage the short of the circuit. remove, replace and test. afterwards connect the woofer - check if your woofer coils are damaged too- Hope this helps? Good day

Jul 12, 2010 | SPL PHANTOM DK-3400D Car Amp

1 Answer

Turn on TV, no picture but sound is ok, thin white line running across screen


You have a frame collapse problem. Line, EHT, power supply, video and sound stages are all functioning. Check frame output ic for dry joints, resolder all pins. HT supply for output ic's derived from line stage check for open circuit safety resistors around line output transformer, if you find any then frame output ic will also be suspect. WARNING Very high voltages exist around the line stage. Make cold tests with Ohm meter with set unpluged from mains supply.

Feb 27, 2010 | Toshiba CN36X81 TV

1 Answer

Pmp3000 problem power supply.ic circuit problem.number series ic circiut..


I have a PMP5000 that I had to resurect. I had to trace out the power supply to repair it.

I can give you hint: First, a small supply runs directely from the line and generates some of the small voltages. While this starts, the main power caps are charged through limiting resistors. The main switcher is brought online and if the power amps acheive balance, then a relay connects the speakers and shorts the limiting resistors.

This is what is in the 5000 and I suspect the 3000 is similar.

In my 5000, there was arcing at one side of the power amps. The board was burned and three power fets fried. Cancer of burned board had to be carved out and traces replaced by hardwiring.
In addition, the limiting resistors were blown open, both main switching transistors were blown and 4 small driver transistors (surface mounted) and several diodes AND a switching regulator chip (surface mounted).all fried/

Hint: When restarting the unit, put a 150 watt light in series with one of side of the power input to limit the current in case you did not get all the dead bodies out.

This is a class "D" amp which drives PCM waves into a filter which is then the audio output. It is much more efficient thaan a linear amp.

Dec 24, 2009 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Behringer PMP5000. The Powered Output B dead


Make sure the three position slide switch is set correctly for the stereo usage, that is NOT the bridged OR the Mon mode.

MAKE SURE the pan pots are set to middle as they control the spit of the audio to the two channels.

This is a class "D" amplifier (switching) and there really isn't any fuse for a single channel.

MAKE SURE your speakon connections are good by swapping your speaker cables.

I repaired my unit and had to do that without schematics... Behringer will not give them out. Mine had a severe arc-over on one side power amp taking out about ten transistors and diodes and one swithcing regulator chip. Had to cut out the "cancer" of the burned board.

This unit uses a complementary output stage that is made up of one transistor on one side and a pair in parallel on the other. This drives the inductor/capacitor filter... I think the switching frequency is between 100KHz and 1 MHz as I recall. All those transistors were gonzo. It also fried the main power switching transistors in the power supply, several smaller transistors, diodes, and the switching regulator chip.
Also two 10 ohm power resistors were fried. They soft start this unit by charging the main caps via two resistors that limit the inrush current.
A small switching supply has to come up first before the main supply which sends the DC to the amp section.

Nov 23, 2009 | Behringer Music

1 Answer

Blown fuse and replaced it and burned the amp


BIG problem! You should NOT have replaced the fuse as additional damage has been done. I repaired a PMP5000 and I can tell you likely what you will find: The smoke and smell came from two power resistors that are part of the soft start circuit that now are toast. You will likely find several components in the main portion of the power supply that are toast. These will include transistors, resistors, diodes, and probably the small 8 pin switching regulator chip. There is a small power supply that comes on first which enables a relay that shorts out those soft start resistors AFTER the power amplifier BALANCES and normalizes.
The unit I repaired had severe damage due to arc-over at one power amp section. Three power transistors were destroyed there and board traces and charring had to be handled in that section.
The repaired unit had to be brought up with a light bulb in series with the line power cord to prevent further damage until all bad parts were discovered and repaired. You will need to take the unit to a shop that is expperienced with the product. The repair cost MAY be pretty high.

Mar 08, 2009 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Marantz PM-34 Problem


Hi there

The part that you speak of is called the emitter stabilizer resistor. It is common to the output pair on one channel. You will find that the large "output" transistors mounted to the heat sink either side of this resistor will most probably be faulty.

Best not to run the amp at all whilst in this condition.

To be sure that you have an effective repair, you will need to change both these parts, and also the "driver" transistors that connect to the outputs. They too are in symmetrical positions close to the the output transistors. You should also check that the 3 legged resistor you mentioned is measuring its correct value, and check all other low value resistors in the output stage area to that channel.

If you are not familiar with repairing this sort of equipment, perhaps you can find a repair guy with some experience on audio equipment, then this work should be all he needs to do to repair the amp. I would also ask him to "blanket resolder" the output/bias stages and power regulator stages in the amp as problems with heat stressed cracked/failed soldering and dry joints often cause these amps to blow the output transistors.

BE SURE THAT THE CORRECT PARTS ONLY are used for the repairs. Different transistors could cause future problems with the amp. The parts can be obtained relatively easily from a marantz distributor(we can find one in a country near to you). OR if you can give me the markings to each of the parts you need, I can provide you with an international source to get them from.

The amp is decent HiFi, and worth repair. Happy to provide you any assitance I can, Good Luck

regards
robotek

Nov 02, 2008 | Carver PM950 Amplifier

1 Answer

P4004 - Blown Components


if burned components are on output stage or amplifier section on board..Then look at the oposite side of amp..Both amplifier section should be a mirror image oof componentc from other..that way you can know the values of parts.If they are on power supply section ..Then you might need manual if available..

Dec 23, 2007 | Rockford Fosgate Punch P4004 Car Audio...

4 Answers

Marantz SR 7200


It is likely that the PA stage has developed an offset voltage in the output stage. The faulty amplifier channel can be found by progressively disconnecting the collectors of the of the power transistors until the protection fault disappears. Once the faulty channel is found the the cause of the offset has to be traced to the faulty transistor or resistor. Don't forget that if you can smell smoke or burning then there are likely to be components(esp transistors) that have been damaged by the fault.
I had a Luxman unit that destroyed 5 transistors in the output stage that was due to an open .5W resistor in the driver stage.
Good luck.

Jan 29, 2007 | Marantz SR-7200 Receiver

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