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Fan problem, cutting out?

Have a technics amp se-hd560 when its turned up loud the sound seems to go off but it says the cd is still playing, think its a problem with the fan on the amp, it wasnt working but does seem to be now and sometimes still cuts out, do i need a better fan?thanks

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Posted on Jan 02, 2017

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SOURCE: Technics SU-V2 keeps cutting out

An amp will cut out if the output protection circuit kicks in. This circuit compares output power against the preset level. Each channel has it's own, independent protector. There are calculations that can be done, but for a novice the rule of thumb is to "never use a speaker with a power rating less than the amp AND a lower impedance than stated". Typically using a 4 ohm load on a 8 ohm system is inviting disaster. Even if the system does not become a smoke generator, you might notice that though "louder", the sound quality is deteriorated. Many "audiophiles" often hook up some combinations of speakers to have "surround" without really understanding that the collective impedance actually changes (generally lowers).

Posted on Jan 21, 2008


SOURCE: amp cuts out

The fan is ageing and putting noise on the protect line. Replace it or put a 100 uf cap across the fan at the plug. Beware polarity is marked wrong on p.c.b.

Posted on Feb 23, 2008

  • 682 Answers

SOURCE: My technics se hd 51

please bring a good contact cleaner from radio shack near you and apply the spray over the socket of the headphone(the place where you put your headphone jack)take headphone jack out and apply spray in and insert the jack in and out many times.-also check your system setup and confirm that all speaker are on- no mute button pressed-no cable is disconnected.

Posted on Jul 13, 2008

  • 140 Answers

SOURCE: amp cutting out

You have one of two solutions.

One: you have the speaker ohm load lower or higher than the amplifier will support. You should check the ohms rating on your speakers vs. the amplifier. Make sure you match up the rates for proper operation. You can also try out a different set of speakers and see if they work properly.

Two: You have an electronics failure within the amplifier. You need to obtain the electronic knowledge and schematics for servicing your unit or bring it to a repair facility in your area.

Just as an FYI.... double check your speaker cables and make sure that neither the left or right is shorting together. Make sure the bare conductors are not touching anywhere. A pinched or damaged speakers wire can also cause the symptoms you are talking about.

Posted on Jan 21, 2009

  • 1 Answer

SOURCE: Technics SUA 900mk2 amp cuts out at high volume.

check speaker wiring its not gone loose

Posted on Sep 05, 2009

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Hi Aawpharmd,

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1 Answer

I have a technics se-hd560 when i turn the volume high the sound cuts out. Can u help

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.

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

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Technics Amplifier SU-VZ320 plays sound for a while and just cuts out sound. Tried switching off and on but no sounds comes through. Leave it off for a while then turn it back on get sound then cuts out...

puede ser un problema con la fuente de poder de la planta,con los parlantes,con los cables y terminales que conectan los parlantes con la planta ,puesto que la mayoria de amplificadores tienen control de temperatura y al sobrecalentarce se apaga por protecion y por eso ensiende por un rato y despues se apaga, por favor revice que los parlantes y los cables con teminales esten bien y no esten aciendo contacto

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Technics HD560 Losing Sound

Hello sir, there are several things you should check for, first the impedance of the amp and speakers, do they match 8ohms to 8ohms, two the amplifiers heat sink is it sufficient? or the amp. may need an extra cooling fan. third the main amplifier is the culprit. check each one and let me know if there is progress. thanks

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1-keep good ventillation around and do not block any ventillation holes with any thing.
2-check your connection cable in good condition no touching of inner conductor with any chasis.
3-check your loudspeakers and apply them to the system one by one until you find the bad one(which make the problem if it is bad)

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My technics se hd 51 amp seems to have stopped working. I have a barely audible sound when turned up to full vol. Any suggestions...can I d.i.y. this job ? many many thanks. Technics SE-HD1 Stereo...

please bring a good contact cleaner from radio shack near you and apply the spray over the socket of the headphone(the place where you put your headphone jack)take headphone jack out and apply spray in and insert the jack in and out many times.-also check your system setup and confirm that all speaker are on- no mute button pressed-no cable is disconnected.

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I've just fixed a Denon amp with the same problem. Replace the mains plug - especially if it a moulded type. Likely that the wires inside the plug have frayed to the extent that there aren't enough strands left to carry the load when the volume is cranked up.

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1 Answer

Sound cuts out

If you listen to cd's and the sound dos'ent cut out then it cant be the amp. It could be the audio cables are intermittant between the amp and the dvd playerr or they are loose or corroded a little. or ppossible the input your using is going bad on the stereo sytem but I wouldnt think that the whole system was blown if the radio and the cd plays normal.. check out the causes I listed and let us know if you need more assistance\..:)

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