smoking eclipse irfz's - 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 15th June 2010, 07:08 PM   #1
diyAudio Member
 
Join Date: May 2010
Location: Where the world's best tea come from:Kericho Kenya
Default smoking eclipse irfz's

Hi guys,
am in possesion of eclipse E404M car amp,(4*40 W rms).It smoked 4 irfz34 power supply transistors,i replaced the 4 irf's and it smoked them again!
What could be the other problem in this amp?Could there be a suitable equivalent replacement for the irfz34?
Regards,Xeclipse.
__________________
if there are no sparks,it probably doesn't work!

Last edited by xeclipse; 15th June 2010 at 07:11 PM. Reason: error
  Reply With Quote
Old 15th June 2010, 07:19 PM   #2
diyAudio Member
 
Join Date: May 2010
Location: Where the world's best tea come from:Kericho Kenya
i forgot to mention,the first burnout was caused by a short to the output;there was no load in the second.
Regards
__________________
if there are no sparks,it probably doesn't work!
  Reply With Quote
Old 15th June 2010, 07:21 PM   #3
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
You may have only repaired a symptom of a larger issue like a blown channel or what not.
Also the gate lead drivers for the IRFZ's might be damaged by the first failure. I have even seen the PWM chip be damaged and need replacing but this is not as often as the drivers for the gates going south with the mosfets.

Lots of possibilities involved here...hope this helps guide you some...


Sounds like a blown channel with your second posting...

Last edited by 1moreamp; 15th June 2010 at 07:23 PM. Reason: addemdum
  Reply With Quote
Old 15th June 2010, 09:45 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Did the new FETs fail instantly?

Were they clamped to the heatsink?

Did you check the output transistors?
  Reply With Quote
Old 16th June 2010, 06:36 AM   #5
diyAudio Member
 
Join Date: May 2010
Location: Where the world's best tea come from:Kericho Kenya
hi guys,
1moreamp,thanks for the info.I got a question:when a channel blows,does it blow the output trans plus the op amp?
Perry Babin,
when i connected to power,the protection led turned on and the FETs fried themselves.They were not clamped to the heatsink.
The output trans are 2sa1909 & 2sc5101,i haven't checked them yet.
Regards
__________________
if there are no sparks,it probably doesn't work!
  Reply With Quote
Old 16th June 2010, 07:49 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Can you post a photo of the inside of the amp?
  Reply With Quote
Old 16th June 2010, 04:21 PM   #7
diyAudio Member
 
Join Date: May 2010
Location: Where the world's best tea come from:Kericho Kenya
hi Perry Babin,
i am away from home now and wont be back till next week.I'll post as soon as i get back.
__________________
if there are no sparks,it probably doesn't work!
  Reply With Quote
Old 16th June 2010, 05:22 PM   #8
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Quote:
Originally Posted by xeclipse View Post
hi guys,
1moreamp,thanks for the info.I got a question:when a channel blows,does it blow the output trans plus the op amp?
Perry Babin,
when i connected to power,the protection led turned on and the FETs fried themselves.They were not clamped to the heatsink.
The output trans are 2sa1909 & 2sc5101,i haven't checked them yet.
Regards


Both Perry and I will say the same thing " You have to clamp the amp back down to the sink before you apply any power to it for testing" The only way to avoid this step is to use a current controlled power supply and or a limiter inline of the 12 volt supply. A limit of about 2 amps is probably OK, but even this is risky.

As for the possibility of a blown op-amp driver , well yes this also can happen.

Also ohm out the outputs also as they are highly suspect at this time.

Plz post a pic when you get back and have time....
  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
Eclipse CD2000 rader Car Audio 4 30th October 2006 03:34 PM
eclipse amplifiers? MyNameIsJake Car Audio 5 24th December 2005 05:25 AM
Eclipse TD712z JRKO Full Range 44 19th September 2005 09:19 PM
Eclipse Brian Donaldson The Lounge 5 28th October 2004 08:32 PM
Eclipse? Larr_e_boy Multi-Way 0 7th June 2001 02:41 PM


New To Site? Need Help?

All times are GMT. The time now is 02:22 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