Epson LQ-2550 User Manual page 188

Removing the upper case
1. Unplug the power cable from the electrical outlet. Then unplug the
cable from the rear of the printer.
WARNING: 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 in your body.
2. Remove the font compartment cover.
Using Printer Options
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