Question about Visonik V800XD Car Audio Amplifier

Open Question

Amp started smoking from Mosfet irfp064n transister when turned on, no power!

I just got this used Visonik V800XD and when I applied power the power light came on and then I saw smoke and of course power light went out. I opened the amp up and saw that someone had replaced one of the Mosfet irfp064n transisters ad it looks like it was burn. I applied power again with a different 12 power supply with a reset and I saw a slight flash of the power light and the reset tripped and I saw a little smoke from the transister. What could be the problem, should I get another transister and solder it in? Is it worth getting fixed or ask for my money back? Any help appreciated as I would love to get this amp up and running. Thanks T

Posted by on

1 Suggested Answer

  • 1068 Answers

SOURCE: what mosfet transistors can I use to replace the

what are the #'s on the factory ones? most likely the tip35's will work but not to sure on that model. if you give me the # of it i can let you know./

Posted on Jan 31, 2010

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


1 Points

Related Questions:

1 Answer


contact eric @ Capital Audio & Electronics Repair in Tallahassee,FL 850-339-1130,we repair all brands & models

Mar 08, 2010 | Lanzar 2H 1000W MOSFET AMP Car Audio...

1 Answer

What mosfet transistors can I use to replace the power supply on a visonik v600hc?

what are the #'s on the factory ones? most likely the tip35's will work but not to sure on that model. if you give me the # of it i can let you know./

Jan 27, 2010 | Visonik V600HC Car Audio Amplifier

1 Answer

Visonik amp problem... amp goes in and out of protection

Check for intermittent shorts on the speaker leads.

Turn down the volume control on your head unit while operating the amp, you could be over driving the amp.

Remove Speaker leads and reset the amplifier. IF the protection LED still comes on amplifier is faulty.

Below is the link to put in a help request with the manufacture for repair.

Mar 25, 2009 | Visonik V408XT 250W x 2 Car Amp Car Audio...

1 Answer

T1500-1bd burnt mosfet

First of all is the mosfet your talking about in the output section or in the power supply section? Most car amps use mosfets in the power supply section, some use them in the output section. To test the transistors in your amp, take a digital volt meter and set it to diode check. Then take the leads and put them accross the first and third legs of the transistors. Usally the red test lead on the first leg and black test lead on the third leg of transistor. If you get a reading of 000 then transistor is shorted. If you get a reading below 600 then transistor is on it's way out if not allready or it's next to a shorted transistor that is it's complimentry output transistor. comonly you will have 2 transistors working together, one NPN and one PNP per a channel, or 4 of them in a bridged type output circuit depending on the watts and how man channels your amp has. I was just looking at the specs of this amp and it's got me confused. It says it's a 2 channel but looking at all the info on different pages it says at 4ohm:200wattsx4 and at 2ohms:300wattsx4 and 1 channel mono 600watts into 4ohms. weird for a 2 channel. anyway that is how you test your transistors. Same way for the power supply section but, you will come accross a couple or more switching diodes that look like transistors and you will get a 000 reading when you test those like I specified. They rarely go out and most of the time there is only 2 of them. They will have a diagram like a diode on the front showing you which way the power flows. Let me know what you find out. Your amp should have went to protect mode if you smoked a mosfet.

Feb 08, 2009 | Audiofonics ADF-243 Car Audio Amplifier

1 Answer

Smoke coming from visonik v4218

Generally, smoke means the power supply FETs have failed. There may be other problems that could have caused it to fail. It will need to be repaired.

Let me know if you have any other questions.

Aug 08, 2008 | Visonik V4218 Car Audio Amplifier

1 Answer

No Output + Burned Transistor and something else...

Depending on which circuit the IRFP064N/mosfet was in then you either have a blown output section and you will need to look at the other mosfet's that work with the one you replaced or if it is in the power supply area then you will need to check the other mosfet's that work with it in the power supply. Of course you will have to test all the driving circuitry that is associated with either output or power supply, which ever is involved and be sure that the driving voltages are correct. Of course, in the power supply it would be a high frequency square wave of about 50% duty cycle. A schematic would probably be of great help. Good luck.

Mar 23, 2007 | Concept CC-452 Car Audio Amplifier

1 Answer

Visonik amps turn on into protection mode(where green not red for three days)...switched over the wires to some sony amps and they dont even turn the hell on

the fuze could be blown on the amp or the speakers are to much power for the amp at full power so try to turn the amp to half and not to turn the speakers all the way up,.

Jan 24, 2007 | Eclipse (XA1000) Car Audio Amplifier

1 Answer

Parallel connection of power mosfets with two of 5 smoking

The IRFZ46N are n channel high speed switches . They basicly drive the Mosfets. Sounds like you have some problem there my friend, and unless you paid alot for this amp. Its going to need probobly all the n channel switches as well as every mosfet + the bias resistors repalced. Before plugging in the amp jump out the fuse with a 100 watt light bulb.. If the bulb glows brightly when you apply power there is still a short in the unit and could be in the switching power supply section of the amp. If it glows bright and dims, The shorts are most likly gone. The bulb will minimize the amount of current the unit can draw and most of the time wont let the new parts blow out. Check out this service number and see if they can help you. Good Luck Main support number 978-823-0300

Jul 26, 2006 | Pyramid PB779X Car Audio Amplifier

1 Answer


It sounds like your saying that you have two identical amp, that both are on the same power wires and remote wires and sam grounds? Well if thats the case then you did ok as One amp sounds like its blown. First tghing is check the main fuse. If its good and the unit still dosent resond then the power supply in the amp is blown as theres a switching supply that increases the 12 volts to get power to drive the Mosfet output devices. Was it ever working?? yes then the amp needs service. Do you know how to work on solid state elctronics down to componet level?? No?? Ok contact these folks at the addy im posting for you or take the amp to your local servicer. Good Luck.

May 07, 2006 | Visonik VB212PKG Car Audio Amplifier

Not finding what you are looking for?
Visonik V800XD Car Audio Amplifier Logo

Related Topics:

213 people viewed this question

Ask a Question

Usually answered in minutes!

Top Visonik Car Amplifiers Experts

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers


Level 2 Expert

265 Answers

Jesse Cofske
Jesse Cofske

Level 1 Expert

44 Answers

Are you a Visonik Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides