Saturday, 1 June 2019
Repair log knight of the rounds arcade pcb
Player 2 Button 2 not working
No clue for player 3
Checked pcb, found already replaced ics with socket.
Measured input pin on Jamma Connector to ic23 input buffer Checked caps. Found cut off one. Replaced 74ls245 on socket and resoldered cap.
Input works again
Second found that jp1 pins goto to the buffer. So chance high that this is a interface for player 3. Measured gnd and then try and error give me
1 coin, 2 start p3, 3 left, 4 right, 5 up, 6 down, 7 fire, 8 jump, 9 and 10 gnd