![]() ![]() this is beacause diodes are provided in the circuit which allows current to move only one direction. after connecting red probe to each of the pin of ribbon cable except pin 1( black probe is connected to pin 1) and hitting all the buttons we didn't get any desired outcome. am\nd the process continues until we get any continuity reading. now i am shifting towards left one to pin 11. after hitting all 32 buttons we didn't get any reading in multimeter. ![]() we have to find out continuity reading at any one of the key switch. connect black probe to pin 1 and red probe to pin 12 of the ribbon cable and hit all 32 buttons of piano switch. Select the multimeter to continuity range.
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