should I buy this amp? - diyAudio
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 3rd June 2012, 05:23 PM   #1
diyAudio Member
 
Join Date: Mar 2012
Location: jacksonville FL
Exclamation should I buy this amp?

I am looking to get another Onkyo M-504...found one, but it has some issues looks great, everything comes on, except the meters do not light up green...dont kno if the lamps are just blown?... does not go into protect mode, but has no sound...
also from what this guy says is that the lanps hasnt worked in a while...and 1st one channel stoped working...but the other played for a while longer..then it stoped as well
Click the image to open in full size.so is this something that can be costly to repair...if someone thinks its something not too much to have repaired($100 ish) but if its much more...it will not be worth it! any help is greatly appreciated

Last edited by rselby; 3rd June 2012 at 05:35 PM.
  Reply With Quote
Old 3rd June 2012, 06:42 PM   #2
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
If you were really lucky, it might be just fuses. Next-easiest would probably be electrolytic caps that have failed, or power rectifiers. Otherwise, unless you are very skilled at troubleshooting, and all of the transistors are still available (assuming it's not a tube amp), and you know what needs to be matched among them, and how to do it, and you have the equipment, I'd look for a different one.

The meter lighting is probably just burned-out bulbs.
  Reply With Quote
Old 3rd June 2012, 07:17 PM   #3
diyAudio Member
 
Join Date: Mar 2012
Location: jacksonville FL
fuses i can do...caps...can probrbly do...the rest would have to take it someone for repair..never had anything repaired...so have no idea how much it is
  Reply With Quote
Old 3rd June 2012, 09:15 PM   #4
diyAudio Member
 
Join Date: Nov 2004
Location: Germany
Buying broken amps always is a bit of a risky business.

If you're lucky, it's just the protection power supply smoothing cap (C708 - 2200/16V, 25+V wouldn't hurt in that spot) that's shorted out and taken the corresponding fuse (F702) with it. At least that would cause the mentioned symptoms, including missing VU meter lighting. The missing channel would be ordinary speaker selector or protection relay contact isues.

If you're less lucky, you've got a fault in the power amp.

At least the service manual is easily available on the web.
  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
If you had to buy a new amp....? jol50 Car Audio 35 23rd February 2009 11:46 PM
Buy: tranzistor 2sk60 & 2sj18 kidoo Parts 1 26th April 2008 01:21 PM
Where to buy a T-amp? Spasticteapot Class D 1 30th October 2006 10:10 PM
Build or buy? Logitech Z-680 & College student donga Multi-Way 3 19th August 2004 08:09 PM
Options of Volume & transformer for group buy GC? JazzzSpazzz Chip Amps 0 9th March 2004 07:36 PM


New To Site? Need Help?

All times are GMT. The time now is 06:50 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