Exterior Covers (SP 5300/5310)
D255/D256/M281/M282 4-48 SM
5. Lift the upper cover [A] by releasing the two hooks, and then put it on the mainframe
so that you can access the bracket [B] on the right side of the machine.
6. Remove the bracket [A].
7. Disconnect the flat cable from the BiCU [A].