Go Back   Home > Forums > Amplifiers > Solid State

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
Reply
 
Thread Tools Search this Thread
Old 13th July 2006, 04:59 PM   #1
diyAudio Member
 
Join Date: Jul 2006
Default Rotel RA-931 problem

Hello wise people at DIYaudio,

I wondered if someone might be able to help?

I have searched the forum and cannot find anyone who has had the same problem with this amp before.

When I bought it, I knew that it did not work, but did not know the problem. After fitting a fuse in the plug I thought that at least the red LED on the front should light when switched on, but it did not. So I removed the cover to see if it was anything obvious, and discovered something I had not seen before. As well as having the ususal rotel output fuses (in line with the speaker outputs), there were an extra two fuses on the main board. They were 5A. So I replaced them (because they were blown) and when I turned on the amp again they blew straight away.
Has anyone had this problem before/can anyone suggest what it might be/how to fix it?

To listen to, I know good hifi. Take the cover off and I am useless! So please, simple terminology would be appreciated!

Thanks for any help in advance,

Nick.
  Reply With Quote
Old 13th July 2006, 05:04 PM   #2
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Nick,
Welcome To DiyAudio!

Quote:
They were 5A. So I replaced them (because they were blown) and when I turned on the amp again they blew straight away.
Don't do that! You may make the damage far worse. If a fuse looks melted, or has a little poof mark you can try to replace it. If the fuse has silvered or blackened the glass, you should not change the fuse.

You need someone with electronics training and equipment to help you. A bad service job will only cost you money and time, possibly the unit.

-Chris
  Reply With Quote
Old 13th July 2006, 07:40 PM   #3
diyAudio Member
 
Join Date: Dec 2003
Location: earth
only a few things needed...

replace output transistors

replace psu caps

and bridge rectifiers, 1 or more of those should cure it.

if not, blown tranny or somehting else on the board
  Reply With Quote
Old 16th July 2006, 04:01 PM   #4
diyAudio Member
 
Join Date: Jan 2005
Location: trondheim, norway
Send a message via MSN to Makofoed-6sn7
lt cdr data,

That might work, but i sloppy. If the output transistors are blown the fault might very likely to be in the driver stage.


Else, I agree with anatech, you need basic knowlegde and some equpitment.

Best regards,

Magnus
__________________
The line under is true
The line above is false
  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
Rotel RCD965BX LE Problem johnmarkp Digital Source 10 2nd February 2014 05:12 PM
Rotel RCD 971 Carriage Problem trombone Digital Source 13 31st August 2008 05:54 PM
Rotel RCC-955 Problem sorenj07 Digital Source 0 27th February 2007 01:51 AM
Rotel amp problem Rotellian Solid State 14 6th February 2006 05:32 PM
Rotel 855 problem Mikelo Digital Source 3 11th January 2005 03:47 PM


New To Site? Need Help?

All times are GMT. The time now is 04:45 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