Question about Audio & Video Receivers
There are a number of variants to this model. How old is it? Also, do you have any experience with repair work? There measurements that need to be taken inside that can be dangerous. If you can, check for shorted output transistors first. That is the most common failure. ALso, there are some other common problems that I will detail later after looking the specifics up. Please update this with your experience level and we'll attempt to get this working for you.
Posted on Jun 24, 2008
Tips for a great answer:
Nov 09, 2013 | Harman Kardon HK 3370 Receiver
Apr 08, 2011 | Sony Audio & Video Receivers
Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
Mar 27, 2011 | Onkyo TX-SR875 Receiver
Mar 13, 2011 | Audio & Video Receivers
Feb 02, 2011 | Sony STR-DE835 Receiver
Apr 30, 2009 | Audio & Video Receivers
Jul 26, 2008 | Audio & Video Receivers
Jan 27, 2008 | JVC RX-1028V Receiver
Sep 26, 2007 | Yamaha RX-V620 Receiver
27 people viewed this question
Usually answered in minutes!