MV-LED





LED-based credits display board in original MVS cabs. Uses two 7-segment displays to show the player's remaining credits.

Uses CRE401 arrays for inputs.

Pinout, from left to right (pins 1 to 13):
 * 5V
 * 5V
 * Clock
 * Digit 1 ABCD
 * Digit 2 ABCD
 * GND
 * GND

Digits are BCD-coded and controlled by registers and.



See also MV-ELA for the marquee board details.



Connection to the MVS board visible in

=Repair=

These boards can be tested in the system ROM's hardware test menu. The third screen shows "LED1" and "LED2" values which should change each second. The value shown should be the value displayed on the boards.