Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Sony amplifier blows - HELP
Sony amplifier blows - HELP
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 18th September 2004, 10:09 PM   #1
viki is offline viki  Portugal
diyAudio Member
 
Join Date: Sep 2004
Location: portimão
Default Sony amplifier blows - HELP

hello i have a car amp, a Sony xplode XM-1002HX when i used it in normal sound it plays well, but when i pull it loud it blows the mosfets (IRF 540 and 9540) of one channel, i replace then, and it plays nice intil i pull it loud and blows agains the mos-fet.

What shoud it be? Should it be froam bias current ?
How can I check bias current of the outputs? I see one variable resistor closer to each pair of the two MOS-FET, but I dont know how to ajust it?

Does anyone can give me the service manuals for this amplifier

Tanks for any help
  Reply With Quote
Old 19th September 2004, 11:03 PM   #2
zagisrule! is offline zagisrule!  United States
diyAudio Member
 
zagisrule!'s Avatar
 
Join Date: Apr 2004
Location: Edgewood, NM
Are you clipping the amp? Problems like this might occur when the amplifier is driving a square wave into the speaker, the current goes through the roof and "pop!" go the outputs.












-Matt
  Reply With Quote
Old 19th September 2004, 11:07 PM   #3
zagisrule! is offline zagisrule!  United States
diyAudio Member
 
zagisrule!'s Avatar
 
Join Date: Apr 2004
Location: Edgewood, NM
BTW: Bias voltage is measured from gate to gate, so put the + lead of your meter on an N-channel gate, then the - lead on a P-channel gate. For running subs you can get away with almost nothing as far as bias goes, but if you are running speakers you want to have 1V or maybe a little more, but that all depends on the power supply design and how well the case is going to get rid of the heat. The more inexpensive amps usually have inadequate power supplies so you will need to watch how much bias you put on the ouputs so you still have enough current reserve to take care of driving the speaker!






-Matt
  Reply With Quote

Reply


Sony amplifier blows - HELPHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
sony amplifier str k750 alimaj Solid State 5 8th January 2009 01:01 AM
Sony TA-NR1 Amplifier Schematic Please? mikeks Solid State 4 11th April 2007 10:16 PM
Help on sony Amplifier PedroPO Solid State 138 25th January 2006 02:53 PM
Car amplifier blows - help viki Solid State 11 21st September 2004 01:36 AM


New To Site? Need Help?

All times are GMT. The time now is 06:22 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki