My tuner has started turning itself on multiple times during the night. I will turn it off and a few minutes later it will turn on again. This happens a intermitantly. I made sure that the Sleep function is off. Just started a few months ago. Any ideas?
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I do not know of a code, but it is a good idea in the design to have several goes at starting a circuit, before completely shutting it down.
Oscillators are supposed to self start due to noise generated.
Some electronic circuits require a reset pulse to be generated before the start up is allowed. The reset circuit may not be generated if the set is turned on again too soon, so it will stay in standby.
This may normally be a few minutes to 30 minutes so it seems something in your set is faulty and could get worse.
Try a test run with the back off and clean it out of dust with a long brush to keep it cooler. Make sure little fingers cannot get near it.
Look to see if anything is obviously overheating.