blown a2300hct audiobahn amp (need help!!) - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 10th October 2007, 02:05 PM   #1
diyAudio Member
 
Join Date: Oct 2007
Default blown a2300hct audiobahn amp (need help!!)

I have a a2300hct audiobahn amp. I was hooking up a battery isolator using the same remote turn on lead as the amp so they would come on at the same time. The car was off but the amp was still hooked up. When i used a positive wire from the battery to turn on the isolator and test it, i heard a crack from the amp. I thought i unpluged the remote from the amp while i was testing the isolator, but i didn't. All the fuses in the amp blew, so i replaced them. As soon as i put the first one in the amp caught on fire. I took it apart and one of the smaller transistors blew up. I'm trying to find a replacement transistor but i dont know how to match the numbers. The amp has about 30 transistors half small and half larger. The one that blew up was a smaller one. This is what is one the face of the transistor.

IRFZ48V
I*R 306H
3D 17

The pic is the half with the small transistors.
Thanks for any help.
  Reply With Quote
Old 10th October 2007, 04:27 PM   #2
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
The top number IRFZ-48 is all you need to replace that item with. Its available just about everywhere including e-bay of all places.


Good luck
  Reply With Quote
Old 10th October 2007, 04:59 PM   #3
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
You can't simply replace the single transistor. You must replace all of them that are in the same supply as the one that blew.

You need to check the ones in the other supply also to see if any have failed. Measure the resistance between the first and second legs of each power supply transistor. None should read near 0 ohms. If they do, the transistor is defective.

After you replace the FETs, you need to power up the amp through a 10-15 amp fuse (in series with the B+ supply line). Clamp all of the transistors to the sink BEFORE applying power. If there is another fault, the new FETs can fail within seconds. If the transistors are clamped to the sink and you use the small fuse, the new parts will likely survive and you'll only have to find the other fault. Without these precautions, you'll also have to replace the new parts (again).

Since you have to order parts, I'd suggest ordering a new power supply driver IC (TL494/594?) and new driver transistors (marked a1266 or a1023?).

If you pull all of the defective power supply FETs and power it up, you can do a few tests to determine if the power supply driver circuit is working properly.
  Reply With Quote
Old 11th October 2007, 01:28 AM   #4
ppia600 is offline ppia600  United States
diyAudio Member
 
Join Date: Jun 2007
Location: Louis y ana
Have fun swapping all those mosfets.Hopefully you don't have to swap the power supply rectifiers too. I just recently got the same amp going with the help from Perry and justonemoreamp. Hopefully the guy doesn't fry it, so far he hasn't. Very helpful guys here
__________________
Don't worry... you can always turn the gain down!
  Reply With Quote
Old 11th October 2007, 01:51 AM   #5
diyAudio Member
 
Join Date: Aug 2005
Send a message via MSN to Safe_Cracker
It is an audioblah amp, is it really worth it in the price of parts? Polo..
__________________
Safe_Cracker :O)~
  Reply With Quote
Old 11th October 2007, 05:11 AM   #6
ppia600 is offline ppia600  United States
diyAudio Member
 
Join Date: Jun 2007
Location: Louis y ana
Quote:
Originally posted by Safe_Cracker
It is an audioblah amp, is it really worth it in the price of parts? Polo..
I'm definately not a fan audiobahn, but some people have been known to pay $150 to get 'em repaired.
__________________
Don't worry... you can always turn the gain down!
  Reply With Quote
Old 11th October 2007, 11:25 PM   #7
diyAudio Member
 
Join Date: Oct 2007
Thanks for the advice, just one more question though. The transistor that blew was IRFZ48V. Do I have to get that exact model number or could I get a IRFZ48 or IRFZ48N? I've found a IRFZ48N.

Thanks for your help.
  Reply With Quote
Old 11th October 2007, 11:32 PM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The 'V' is rated for higher current than the rest. It would be best if you use those as replacements. Digikey has them.
  Reply With Quote
Old 12th October 2007, 02:08 AM   #9
diyAudio Member
 
Join Date: Aug 2005
Send a message via MSN to Safe_Cracker
http://www.mouser.com/search/Product...ey512-RFP70N06
__________________
Safe_Cracker :O)~
  Reply With Quote
Old 12th October 2007, 02:14 AM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Those will probably work but it's always best to use the exact replacement unless you have the knowledge and test equipment to know if the replacements are working properly.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
audiobahn a2300hct has me stumped ppia600 Car Audio 25 9th August 2007 02:18 PM
Blown Audiobahn AX600 AMP: Repair? Dominick22 Car Audio 13 30th May 2006 06:41 PM
audiobahn spl on_chrome Subwoofers 1 23rd January 2006 05:35 PM
audiobahn amp sethro Car Audio 2 12th August 2005 08:22 PM
how close r watt ratins on a AUDIOBAHN A2300HCT amp n has ne1 used it.. and a jbl gto the bass master Car Audio 7 22nd July 2004 12:18 AM


New To Site? Need Help?

All times are GMT. The time now is 08:12 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2