Radio Shack TRS-80 PC-3 Owner's Manual page 84

Figure 22.
NOTE: Use of irregular paper tape may cause irregular paper feeding or paper
misfeed. Therefore,be sure to tighten the roll before using,as shown in
the figure.
Figure 23.
Figure 24.
(4?t:;'8
Wrong Right
(4) Turn on the Printer switch and press the paper feed button until the paper comes out of the Printer mechanism. (Fig. 25)
Paper cutter
(5) Install the roll of paper into the compartment.
Paper feed button
Printer switch
84