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I have a technics su x502 amp & it works for a while then goes off & then comes back on after about 5 mins,the rest of hifi stays on its just the amp.

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Take out the cooling unit (the fan) and use a cpu fan out of a pc connected to an external power source like a 12v dc/ac adaptor and use it to blow constant cool air through the hole onto the heat sink. i know it sounds like a ruff job but it does work, my amp doesnt even get hot and it plays all night long without cutting out once. you will get noise from the fan constantly on but i just turn it up louder. this is just a ruff quick fix.

Posted on Sep 08, 2012

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megatronix
  • 57 Answers

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

marsrover
  • 682 Answers

SOURCE: technics su-a808 amp & sh-ge70 graphic equaliser.

connect your media source(dvd-cd player)to equalizer in-connect equalizer out to amplifier line in-or aux in-connect amplifier out to your loudspeaker.

Posted on Jul 16, 2008

  • 120 Answers

SOURCE: Technics amp su-vx800 goes in to protection mode

yes it can, it sounds like its over heating, make sure that your product is able to get fresh circulated / cooler air
if it already is, then it probably is a faulty product.

Posted on Nov 23, 2008

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Hi,
If you are tech guy then follow below technical instructions to fix your Amp problem.
Amp has motorized volume control and motor drive circuit has problem so motor rotates just one side (ends up volume) Below picture shows how is motor board and what drive IC is to power the volume motor.
You need to check voltages at pins and replace bad IC.

02e7045.jpg

f090c04.jpg
It is very simple circuit and easy to repair.
Good luck.

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