hifi engine

technics av stero receiver model sa gx690

I will like to get the specification of the cooling fan unit or will like to know how to order a new fan unit
Somtimes when volume is turned up the unit trips off due overload message
When tap fan at the back of unit it comes on and the stero works



technics av stero receiver model sa gx690

If the fan is operating and cooling the amplifier I doubt if the fan is at fault.
Protection mode can be caused by improper impedance of the speakers, bad speaker cables, a defect in the amplifier or over-heating of the amp (is there enough room around the sides and back?)
Since tapping the unit makes it come on there may be bad connections inside.