Epson U375 - TM B/W Dot-matrix Printer, Technical Manual

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2-11
When the J insertion lever is rotated by hand in the direction
of
➡
A, the lever closes the cut sheet path C (the state
indicated by dotted lines in Figure 2-30) and opens a paper
path under the J guide for the paper roll. At the same time,
the microswitch turns on. In response to this signal, the
paper feed motor set operates and the J paper feed roller
begins to rotate in the direction of
➡
B. In this state (with the
J insertion lever depressed), if paper roll is inserted in the
direction of
➡
D all the way to the J paper feed roller, feeding
of the paper roll is continued through the friction between
and rotation of the J paper feed roller and J holder roller.
To stop paper feeding, release the J insertion lever. The
tension of the J insertion lever spring returns the lever to its
original position while the microswitch turns off at the same
time, stopping the paper feeding operation.
Figure 2-30. Semi-autoloading Mechanism
Cutter mechanism
The cutter on this unit is a manual cutter, and consists of the
parts shown in Figure 2-31.
The cutter cover is normally used to protect the operator
from injury. When cutting the paper roll, the cutter cover
moves in the direction of the
➡
, using the cutter cover shaft
as a fulcrum, and cuts the paper roll. After cutting the
paper, the cutter cover is returned to its original position by
the cutter cover spring.
Figure 2-31. Cutter Mechanism
Clamshell mechanism
The clamshell mechanism consists of the parts shown in
Figure 2-32. This mechanism plays an important role in
improving operability when clearing problems such as
paper jams or when replacing the print head.
●
Opening the clamshell mechanism
1. Remove the ribbon cassette from the printer.
2. If the control portion of the ribbon frame lever is pulled in
the direction of
➡
A, the link between the ribbon frame
lever and carriage guide shaft A is released and the
ribbon frame rises several millimeters in the direction of
➡
B.
3. While holding the ribbon frame lever or both sides of the
ribbon frame, open the ribbon frame in the direction of
➡
C.
Figure 2-32. Opening the Clamshell Mechanism
CONFIDENTIAL