Question about Technics SA-EX800 Receiver
Disconnect all speakers and see if you get the same error.
If you don't , get an ohm meter and start checking the speakers and wires.
Anything les than 4 ohms is likely the problem.
Check the impedance on your speakers to see if they should read 8 ohms or 4 ohms.
Check the wires for shorts.
If the amp says overload with all inputs and outputs disconnected, then you likely have a blown output transistor. Start checking the output transistors for shorts between any 2 pins.
To check the transistors properly, check them out of circuit.
here's a couple links to my tips and tricks to help you in that area.
Hope that helps you out!
Posted on May 27, 2011
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Posted on Jan 02, 2017
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