Question about Technics SA-EX300 Receiver

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Technics SA-G9057 overload

I disconnected all the speaker and the problem continues (the screen shows the message overload), please somebody be able to help me?

Thanks in advance,
Marcelo.

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  • Anonymous Oct 22, 2008

    Overload

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Check the fan connections at the back. The connections (just two flimsy metal prongs) came apart (I believe), so I have had to re-enforce them with electrical tape so the connections stay together until I investigate a further replacement fan. For now the connections are extremely sensitive to motion/viberation/impact/etc... but it does work now.

Posted on Apr 03, 2009

  • csprevost1 Apr 03, 2009

    Now, before you open up the amp to check the fan, I MUST URGE CAUTION! The fan is right by the transformer. You have three plastic pieces that stick out to hold the fan in the amp case. two of them are in tight spaces, and one is precariously close to the transformer and power unit, and the other is close to capacitors. Of course I need not mention to unplug it for obvious reasons. Hope this helps!

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OVERLOAD
1. unplug the stereo
2. check all speaker connections
3. open the cover
4. clean it [fan dust]
5. unplug the MAIN POWER connections, [ INSIDE THE STEREO ] let sit for 1 minute
6. PROBLEM SOLVED

Posted on Feb 17, 2010

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If you are a technician, try remake every soldering of the Audio output Module ( The big Grey IC ) and to all the components who are fixed to the Big Aluminum Heat sink.This tipe of big thin heat sinjk tend to dilate ( change of size) and move up and down quite a bit due to the high operating temperature of this class of ampli.
Sorry for my bad english writing.
Spider Guy

Posted on Mar 15, 2010

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1 Answer

Overload


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

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 'nekkid'. 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 another possible root cause for intermittent shutdown.

Nov 11, 2011 | Audio & Video Receivers

1 Answer

I have a panasonic sa-he70 av control receiver, it is showing on its screen OVERLOAD, SWITHC OFF POWER, i did it twice and still apperas same message. Is my equipment damaged or I just need to reset it?


Page 16 of the manual has recommendations.

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.

Jul 27, 2011 | Panasonic SA-HE70 Receiver

1 Answer

My Samsung Home Theater System is not working Properly It shows "Protection" message on the LED Screen and turns Off.


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.

Jun 21, 2011 | Audio & Video Receivers

2 Answers

Have recently had an "overload" displayed. Have


HI:
Usually receivers go into overload due to a bad speaker make sure you disconnect the speakers also to make sure its overloading from a bad speaker. If the unit still shows overload even with all speakers disconnected, then your main amplifier output has a short usually a shorted output transistor is the cause. Unplug the speakers one at a time to and turn the unit on after disconnecting one of the speakers , to determine which speaker is at fault.

Jan 23, 2011 | Panasonic SA-HE200 Receiver

2 Answers

My Pioneer Receiver (SX-255R) won't play anything. I only have a CD player connected to it. The screen only says "Muting." I've tried unplugging it for 30 minutes and re-connecting. Still says...


Just to be sure we are talking the same unit I have included the link to the user manual for SX-255R
http://www.pioneernz.co.nz/Site/Pronto/Files/user_manuals/SX255R%20USER%20MANUAL.PDF

Suggestions
1. have you tried to press the Muting button on the remote unit.
(item 11 remote unit diagram)? does it make any diffrence - what if the button is stuck?

2. Have you tried to play the Tuner radio - what happens then? do you still get Muting.

3. You mentioned something about speaker wire coming out.
I understand that Pioneer receivers shut off if any of the speakers is faulty, ie, correct impedance is not showing at the speaker input point.
Usually the newer units give an "overload" message. It is possible this could be happening and the SX-255R gives the "muting" message instead. Some people have reported very minute shorts where strands of the speaker wire touch the body and it causes "overload".

One way to check is to remove speakers wires one by one and see if the "muting" goes away. Then you can check the offending speaker if that is what is happening.

Good luck
Please do drop a comment to say how you progressed.

Dec 26, 2009 | Pioneer SX-255R Receiver

1 Answer

DISPLAY SHOWS "OVERLOADED" MESSAGE


Disconnect all speakers at the receiver then turn the unit back on. If it stays on, post a comment and I will walk you thru troubleshooting. If it still shows "overload" it needs to be serviced. Hope this helps

Dec 22, 2009 | Panasonic SA-HE70 Receiver

1 Answer

Overload displays on the screen


If it say's overload with no speakers connected and the unit on, it needs service. If you need further help, post a comment and I can help you troubleshoot.

Aug 11, 2009 | Panasonic SA-HE70 Receiver

1 Answer

Overload signal


The overload is the same as protect mode. Remove the speaker wires and turn the unit back on. If the message remains, there is a problem internal to the unit in the final stage of the amp.

Please let me know the results of the test above.

Thanks,
Dan

Mar 02, 2009 | Technics Audio & Video Receivers

4 Answers

Amplifier displays "Speakers are overloaded" and switches off


Either the amplifier protection circuit is kicking in due to a fault, or your speaker wires are shorting. Could also be a fault in a speaker - shorted turns due to overdriving. Check amp with speaker leads disconnected, and if OK, see above.

Dec 10, 2007 | Panasonic SA-XR55 Receiver

4 Answers

"Overload" Message


greeting from belize first of all plug in the set into a wall socket and pull it out back quickly it might want to reset,if that does not work take to a tech for repair your chip might be be damage.good luck.

Mar 23, 2007 | Motorola DCP-501 Receiver

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