Cyrus Power failure - help? - 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 12th April 2009, 05:14 PM   #1
diyAudio Member
Join Date: May 2006
Default Cyrus Power failure - help?


I think my cyrus power amp may have come faulty.
Last night it was ON but not playing music, and a large "thump" from both speakers came out.
After that i get a Yellow flashing light (the manual says its dued to DC voltage detected at the output).

I opened it up, doesnt seem to have nothing blown up...don't know where to start looking and checking. Maybe someone can give me some directions?

Its the Power amp, i believe the first one they made.

Thank you a lot
  Reply With Quote
Old 12th April 2009, 11:21 PM   #2
jaycee is online now jaycee  United Kingdom
diyAudio Member
Join Date: Apr 2004
Location: Norwich, UK
Output power transistors, and probably collateral damage from that.
  Reply With Quote
Old 13th April 2009, 10:24 AM   #3
diyAudio Member
Join Date: May 2006
Can they be replaced by an enthusiast with a soldering iron?

anybody can give a chime on the part numbers?

Also, if they blew, maybe the cause of failure is somewhat prior to that, which would lead to another blew if all I do is replace the transistors.

How can I measure where is the cause?
Anyone here with experience in cyrus power blew ups?

Thank you
  Reply With Quote
Old 13th April 2009, 07:26 PM   #4
diyAudio Member
Join Date: May 2006
I took a deep look into the board, it all seems to be SMD resistors, dont know if they can be changed if necessary.

Transistors look to be accessible but i would have to desolder some joints from input and output wires in order to remove the PCB from the case.

If anyone can help here, i would venture but otherwise, i think it will rest in the closet. Shipping it back and forth to cyrus audio for a repair would probably be more expensive than its used value.
  Reply With Quote
Old 13th April 2009, 09:28 PM   #5
jaycee is online now jaycee  United Kingdom
diyAudio Member
Join Date: Apr 2004
Location: Norwich, UK
Sounds like one of Cyrus's newer amps. Sorry, but that's out of "enthusiast with a soldering iron" territory im afraid
  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
Cyrus 1 power transistors Fleetwood Max Solid State 7 11th August 2009 12:57 AM
Cyrus 2 power switch? voltrax Solid State 0 17th March 2008 03:47 PM
Mod Cyrus II power train for PSX? enthusiastor Solid State 20 27th June 2007 03:35 PM
cyrus one - on/off power button viva14 Solid State 3 29th March 2007 06:16 PM

New To Site? Need Help?

All times are GMT. The time now is 12:03 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