Question about Technics SUV500 2-Channel Amplifier

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Cicuits Protection when the amp is powered up for a few minutes with music playing the amp 's circuit protection cuts in ?

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  • macshirty May 25, 2008

    hi,i have a technics sa-gx190 receiver,and i run a pair of mission 732 speakers.evertime i turn the volume up,system overload displays,and the sound cuts out.i have changed both tweeters in speakers,as one was blown,thinking this might cure my problem,but it has not.please can you suggest what i can try next.thanx 4 your helo,regards,paul.

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Check speakers impedance with a tester, run the amplifier without speakers, with the speakers switch on, if the amplifier not shut down the problem is the speakers

Posted on Apr 20, 2008

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You have a power supply circuit problem,you need a qualified serviceman near you.

Posted on Feb 18, 2007

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1 Answer

My NAD C326BEE amp goes into protection mode at moderate volume


The protection only should come on, when the power amplifier has to give more current than it can deliver. (electronic fuse)
If in the music is a lot of subsonic, sound, so low you can't hear and your speakers can't produce, this could cause the problem. Normal CD players will cut of all frequencies beneath 20 Hz, but it could be your PC is giving everything from 1 Hz and above.
I would certainly try to play some music over a CD player and check if that would solve your problem. Not sure if that works, what you could do to suppress the sub sonic in the computer music.

Aug 22, 2012 | NAD C326BEE Amplifier

1 Answer

Well i was driving one day and my subs just whent out so i bought brand new wires and hooked everything up but the power protector light turns red whenever uu turn it up past volume 10 i really do not know...


It sounds like your amp is going into protection. I know it's frustrating, but this is actually a good thing. If you subs you have are drawing too much power and the amp can't keep up, it will shut off instead of melting the board. Usually, the protection mode only last a few seconds. The user normally turns the music down that the protection shuts off and the music plays again. I recommend looking at a larger amp for your subs, if you are going to play them that hard.

Aug 14, 2011 | Car Audio & Video

2 Answers

It plays for about 30 minutes and then just stops, as if overheating. After a cooldown period, it starts up again for another short period. Suggestions? Any recommended vents I could cut in...


The small Fender products often have a TDA2050 power chip in them. The chip is on a thin aluminum heatsink and is intended for light use. If you try to sound like a bass guitar amp with this, the chip will go into thermal protection mode. Cutting vents will not help very much, and pushing it to these levels will destroy the speaker eventually. If you need more power, buy a bigger amp. This one would be suitable for a 10 foot by 10 foot room.

May 24, 2011 | Fender Musical Instruments Corporation...

1 Answer

My subwoofer doesn't receive power, all amp fuses are fine, amp powers on, remote wire and rca wires are connected and intact. Before it stopped working all together the woofer would cut out and after...


If you are getting power to the amp, try this....Find a small speaker, unhook your sub and wire speaker to amp. Turn on your system at a low volume....If the other speaker is playing through amp, then your sub is shot.....If the small speaker doesnt work, then its either your channel is gone on the amp or the rcas have quit off off your head unit.

Oct 07, 2010 | Kenwood eXcelon X1200M Car Amp

1 Answer

Hi, sometimes while playing sound suddenly goes off. After cutting mains and restoring of mains, the amplifier starts working properly. I have checked cables and all. thanks


it is possible that you have eitherr a power realted issue or a protection circuit in acttion. First of all takeou the plugs and ccheck if there is corrosion in the pins, burn marks. If so clean them using a good emery paper,If so do not use the outlet that you are presently using. Otherwise If this seems OK, then you must check your speaker connections and check to find if the amp is over heating when it cuts off. Open the set top coverr and maek a good cleaning and tightening of the cords and boards while checking for burning smell. If you are able to access the main board, try to check for dry soldering bad joints in power and output cicuits. Use a good iron to do the resoldering and check again. If set is cutting off at high volume or high bass, then reduce load to confirm. If so you will have to check for distortion or wrong biasing in the output stages. Hope you check this out. Good day

Jul 18, 2010 | Krell KAV400Xi Amplifier

1 Answer

What is "Press Power Protect"?


Hi Lois,
Stereo sytems have a protection circuit that alerts you by displaying "protect" when there is a electrical short circuit detected in the system, the most common short happens in a speaker, try disconnectig the speaker wires of both speakers(all speakers) at the back of the system, then play the CD or cassette player(although you will not hear anything with the speakers disconnected) and see if the unit goes into "protect" mode if the problem is still present then you have an internal short circuit and the system will need to be sent in for service or replaced(depending on age,repair costs). I would not recommend investing more than $80 into repairs. Now, if the unit does not go into "protect mode" then one of the speakers or speaker wires is shorted,be sure you check the conndition of the speaker wires before you replace the speakers, then you can replace the speakers(in a pair) and you should be back up and listening! Good luck and Merry Christmas !

Dec 03, 2009 | Sony MHC-NX1 Shelf System

1 Answer

My Kenwood amplifier is having problems, whenever i turn it on. all seems well until i play some music through it, after 30seconds to a minute the music will cut off and a distinct click is sometimes...


Your amp is going into protection. The click you hear is a relay meant to protect your speakers and stereo. Check your speakers with an ohm meter for the the proper ohms ( listed on the speaker ) and physically try to push each woofer and midrange cone in gently to make sure it moves and is not stuck or frozen in place. A speaker may read correctly on an ohm meter if the woofer is ok but if the tweeter or midrange is not working it will cause the amp to go into protection mode. When you play music stick your ear up to each tweeter\midrange\woofer to ensure they are working.
Your stereo could also be the culprit although usually if it plays music it is ok as long as you are not hearing loud pops. Loud pops are voltage spikes that indicate that a transistor\IC is breaking down and will eventually short. Good luck!

barneyluc

Oct 01, 2008 | Audio Players & Recorders

1 Answer

Protection light coming on and amp cutting off


yes make sure there both connected properly, check the fuses, the protection light usualy comes on when there is too much power and the amp protects itself from blowing

Jul 16, 2008 | Car Audio & Video

1 Answer

Denon avr-5600 protection circuit.


My AVR 5600 has worked flawlessly for nearly 9 years!

Suddenly, when trying to play music (DVD or CD) through my LS32's (JBLPro), once I achieve higher volume, the receiver cuts off.... Using a Symetrex mixer, NO OVERLOAD light on the Denon, it simply cuts off!

Re-cut all the wire connectors... TV movies (5.1) work great at normal listening volumes.... but tonight, when cranking up music, the receiver simply cut off. Blinking light...

HELP

forfrance@hotmail.com

Apr 12, 2008 | Denon Audio Players & Recorders

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