I did a cold check dc resistance ( forward and reverse ) of the 3 pins
of pd4543a which are mecha mode switch inputs , and all measure 28k
ohms both ways...if 1 was open or blown wouldn't it measure different.?
One end of each switch is gnd while the other (IC input end) is tied to
+5V through a pull up 22k resistor.
Cant seem to locate a datasheet for the ic, it has a pioneer symbol on
it.
Help pullllleeeeeaase !!!!!