Datamax I-class Maintenance Manual page 86

6. Remove the four Screws that secure the Backplane PCB to the Card Cage and then remove the
Backplane PCB.
Replacement:
Proceed according to the Part Number of the Backplane PCB:

If installing P/N 51-2311-00, ensure a
Jumper is placed across E2 & E3.
Removal and Replacement
Backplane PCB
4-30
Card
Cage
Screws