Welling HS-8 Powered subwoofer problem.. - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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
Thread Tools Search this Thread
Old 20th May 2010, 07:56 AM   #1
diyAudio Member
Join Date: Apr 2006
Location: Sydney
Default Welling HS-8 Powered subwoofer problem..

Hi everyone,
I am currently attempting to give new life to a forgotten powered sub. When i first turned it on it made a very loud "HUM" and then the fuse popped. I found the cause of this to be a shorted C2837 (Sanken). I replaced the transistor pair (C2837/A1186) and the hum went away and fuses stopped popping. The issue now is that the system only amplifies for short periods of time at what seem to be regular intervals. i.e. without any input, there is a small "pop" at a rate of about 0.5Hz. When I do connect an input, it will be amplified for the duration of that pop, so if you can imagine every two seconds or so, the song comes on for about 1/4 to 1/2 of a second.

I have never come across anything like this before, has anyone got any information to point me in the right direction?

Thanks in advance.
  Reply With Quote


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
JBL Powered SubWoofer - Need Schematic poynton Subwoofers 7 5th March 2010 11:49 PM
how to connect a non powered subwoofer to a stereo system without a subwoofer output JSD777 Multi-Way 4 20th September 2005 03:19 PM
where to buy powered subwoofer? secateurs Subwoofers 4 11th July 2005 08:59 PM
need help repairing powered subwoofer mbates14 Solid State 12 9th June 2005 11:30 PM
Help in transforming a powered subwoofer in a passive one!!! Rimbaldo Subwoofers 5 19th June 2004 05:26 PM

New To Site? Need Help?

All times are GMT. The time now is 03:21 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2