Onkyo Sub will not power up (fuses blow) - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 May 2010, 11:01 PM   #1
diyAudio Member
 
Join Date: May 2010
Question Onkyo Sub will not power up (fuses blow)

Hey all. I have an Onkyo SKW-540 Sub that will not power up. The LED is no longer illuminated. I took of the back panel and found the 5w/125v fuse has blown. I replaced the fuse with a 5w/125v fuse, but it blew when I plugged the sub back in. Any ideas to what could be happening or how I can fix this?

Thank You.

Zach
  Reply With Quote
Old 15th May 2010, 11:22 PM   #2
diyAudio Member
 
Join Date: Mar 2010
You need a service manual. Apparently the amplifier has failed.
  Reply With Quote
Old 16th May 2010, 12:08 AM   #3
diyAudio Member
 
Join Date: May 2010
Where can obtain one of those? Any idea if this would be a costly repair?

Thanks
  Reply With Quote
Old 16th May 2010, 07:00 PM   #4
diyAudio Member
 
Join Date: Mar 2009
one of your power amp output might be shorted. i suggest to see the parts of the unusual appearance like burned or cracked parts, they should be replaced to avoid future problems. Also, try to test the parts of the out-circuit. (never try to power-up the circuit with unpaired output)
  Reply With Quote
Old 16th May 2010, 07:06 PM   #5
diyAudio Member
 
davygrvy's Avatar
 
Join Date: Mar 2007
Location: Oakland, CA
Blog Entries: 1
Quote:
Originally Posted by zsmith28 View Post
Where can obtain one of those? Any idea if this would be a costly repair?

Thanks
1) from the company that made it.
2) probably just the freight cost if under warrantee

But you have to ask yourself, do want to fix it or have someone else. Start by finding your nearest local Onkyo authorized service center.
__________________
Think out of the box
  Reply With Quote
Old 16th May 2010, 07:49 PM   #6
diyAudio Member
 
Join Date: Mar 2010
It's probably a major repair job. Not too expensive if you can do it yourself but consider replacing the unit if you have to pay for a repair.
  Reply With Quote
Old 16th May 2010, 08:00 PM   #7
diyAudio Member
 
davygrvy's Avatar
 
Join Date: Mar 2007
Location: Oakland, CA
Blog Entries: 1
If the sub is sent in for repair, that's exactly what they'll do. The tech will grab a new power amp module from the shelf, replace the bad one, test it, mail it back, done. Whether it cost you much is determined by the warranty status.

Blowing fuses is the symptom of shorted output devices. Probably 2SA1943 and 2SC5200 transistors, but that's just my guess from usual asian gear. Test center pin to the side with the ~0.22 ohm emitter resistor with your meter on diode test. If you get zero, you have at least a pair of bad apples. And they always go in pairs

Well, once I saw one NPN and two PNPs, but that was a rare occurrence.
__________________
Think out of the box
  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
onkyo A-8200 popping fuses.. marko Solid State 34 21st March 2010 04:48 PM
NAD fuses, slow blow or fast blow? AllCaster Solid State 3 25th October 2009 06:11 PM
Adcom GFA-535 Blow fuses after connected to MG-Is vacs2000 Solid State 0 26th February 2009 07:35 PM
Completed LM 4780-but fuses blow? Dominick22 Chip Amps 27 6th January 2006 04:08 AM
fast / slow blow fuses millwood Everything Else 3 5th January 2004 05:49 PM


New To Site? Need Help?

All times are GMT. The time now is 01:41 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