Its a technics su-ch700 amp and as you increase the volume it clicks cuts out and goes on to standbye, it will play but the volume has to be low. I took the casing off and tried it to see if there was anything obvious, i also noticed that the fan comes on aswell just before it cuts out, can you help many thanks
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Re: 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.
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You seem to have the answers to your question. I would just resolder the connections anyway without checking. If it solves the problem you have saved yourself a lot of money. If it doesn't follow the other steps in order of cheapness!
Let's establish which is the IN and which is the OUT here. The PC is a Line Level source so its OUTPUT would feed one of the amp's Line Level INPUTs.
What's the second amp going to do in your scenario? Something other than the normal stereo channels; something multichannel (if your PC supports it); or just more speakers supported for the PC to feed?
An RCA Y-connector pair would share the stereo output of the PC with multiple Line Level destinations.
If a second amp with its own volume control is intended to share the same two channels with the SU-V500 it could also be slaved off the back of the SU-V500 wih an RCA patch pair exiting the Tape 1 or 2 REC(OUT) jacks. The second amp would receive full-volume audio from whatever source the SU-V500 is playing. Just don't activate the selected Tape monitor on the SU-V500 or you will cut off the source to both amps.
Use a multi meter,set it to 12v,turn system on use some bass.while music is playiing hold pos of multi meter to poss- neg to neg- on amp see what voltage is running at at what its dropping to it sounds more like a voltage drop problem.if you hooked it up back words u could fry unit..Have you done the big 3.what size is your alt,and what is your amps draw..
The most common cause of this is defective coupling caps inside. These allow some DC voltage to pass through to the final amp stage. This DDC voltage is detected by the protection circuit and the unit shuts down. This unit will require service. Please note that this should be a simple and inexpensive repair. The cost should be less than $10 for parts.
most of these type systems have feedback path which shuts down the system once there is excess heating in the regulating transistor... i think there must be something getting shorted when u turn the volume up.....