Hi I have a mini hi fi kenood On the output of the stk412 - 30 I have q901 and 904 for sp det. Can you explain how they work?should they lower the 5 volts when there is an output overload of the stk412?
You have drawn an assumption to a far gone conclusion. Your motive operandi.... well, I admire your curiosity.
2)Q901,Q902,Q903,Q904, these transistors have nothing to do with control your output,its senses the output and displays information terminating to the microprocessor pd780206 pin 49
Which is responsible for your fluorescent screen display.page 26 of the data sheet.