The Interface Boards
Removing the upper caseWARNING: High voltages are present inside the printer when the power is on. Do not attempt to remove the upper case unless the printer is turned off and the power cord is unplugged.
Also, try not to touch contacts on the circuit board of the printer because many of the components can be destroyed by the static electricity present in your body.
1. Unplug the power cable from the electrical outlet.
2. Remove the font compartment cover.
Appendix A - 3