You need an appropriate ground wire to ground your printer.
Recommended wire is described below.
AWG 18 or equivalent
3.2
Thickness of wire:
Diameter of terminal to be attached:
I
Make sure that the printer is turned off.
2.
Connect the ground wire to the printer using the FG screw on
the back of the printer, as shown.
P
295
P
295P
Installation
1-7