Question about Audiofonics ADF-243 Car Audio Amplifier
This amp was still working fine but drained my battery so i unhook the battery and remove amp-- It definatly smoked a mosfet. But I am unsure if this is the only problem or how to check for possibly faulty components. Any advise would be appreciated.
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.
Posted on Feb 12, 2009
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 19, 2014 | Reebok Exercise & Fitness
Aug 16, 2012 | Ford Cars & Trucks
Sep 06, 2011 | Boss Car Audio & Video
Apr 25, 2011 | Dual 2-Channel Bridgeable MOSFET Amplifier...
May 02, 2009 | ASUS P4GE-MX Motherboard
Feb 08, 2009 | Rockford Fosgate Power 1500.1BD Car Audio...
Oct 08, 2008 | Gateway MX6030 Notebook
Mar 05, 2007 | AudioBahn A4004T Car Audio Amplifier
212 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: