20 Most Recent Technics SA-AX540 Receiver Questions & Answers


Heat?


Generally speaking, an amp protects itself from heat, shorts and overloads 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.


Check for loose speaker connections as a root cause for intermittent shutdown.

Technics... | Answered on May 31, 2015


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Technics... | Answered on Dec 07, 2013


I had the same problem. As soon as the volume reached about 24db it would go into overload. I was able to fix it by soldering all the connections on the larger power module. The one connected the the heat sink. When I took it apart there where several solder points that had come loose.

Technics... | Answered on Nov 15, 2012


Please check this link for unversal remote that will match if you are not able to get a Technics remote:

http://www.espares.co.uk/search/remote-controls/p/1090

Technics... | Answered on Oct 27, 2011


It's a eur647130. Web searching turns up a bunch of them.

Technics... | Answered on Aug 20, 2011


Start by changing the battery's, then if the problem still persists try and hold down the power button for 5 seconds and then see if maybe it took, if not then it might me time to replace the remote. I hope this could help. if not please let me know and i will try to help you out.

Technics... | Answered on May 28, 2011


Hello - There are two possible causes for the error (that don't involve something broken).
The first is that the receiver is not getting enough ventilation (stuck inside a cabinet with no space, etc.) but since you you describe it happening as soon as you turn on the receiver that's very unlikely.
The second and more likely cause is cross connected speaker wire. Remove the speaker wires from both the receiver and speakers and carefully reattach them. Hopefully that will help. Otherwise it looks like you would have a repair decision to make.
Good Luck, Mikeywaf

Technics... | Answered on May 08, 2011


Generally speaking, an amp attempts to protect 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.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

Technics... | Answered on Apr 24, 2011


Disconnect everything from the receiver and start over. Obviously it was working before you touched it.

Generally speaking, an amp protects itself from heat, shorts and overloads 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.


Check for loose speaker connections as a root cause for intermittent shutdown.

Technics... | Answered on Feb 21, 2011

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