Epson EX-1000 User Manual page 15

WARNING
The power must be OFF when you move the print head. Otherwise,
you may damage the printer mechanism. Also, if you've been using the
printer just before changing the ribbon cartridge, be careful not to touch
the print head because it becomes hot during use.
Move the print head carriage to about 25 on the ruler on the paper
3.
bail.
4. Remove the ribbon cartridge from its packaging and tighten the
ribbon by turning the knob in the direction of the arrow, as shown
in Fire 1-4.
5. Make sure the paper bail is against the platen.
Hold the cartridge, gently squeezing the two ridged plastic tabs
6.
together; then lower it (as shown in Figure 1-5 below) into the print
head carriage. As you lower it, see that the tab on the back of the
cartridge rests on the corresponding tab on the carriage and that the
ribbon passes between the print head and the silver ribbon guide.
7. Release the tabs so that the pins on the tabs click into the holes in
the sides of the print head carriage.
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Setting Up the Printer