Epson TM U200D - B/W Dot-matrix Printer, Техническое руководство

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Rev. B Mechanism Configuration and Operating Principles
TM-U200D/U200PD Technical Manual
Switching from Black to Red
When the Carriage, sub-ass’y (print head unit) moves in the E direction and reaches the ribbon
switch area, the Lever, ribbon switch is pushed by the ribbon switch section and moved to
position A (shown by the dotted lines). The Frame, ribbon ass’y is pushed upward by the Frame,
ribbon push face, ribbon switch detent face falls into the Lever, ribbon switch hole of the Frame,
ribbon ass’y and the Frame, ribbon ass’y is set to the red position.
Releasing from Red to Black
When the Carriage sub-ass’y moves (in the D direction) and reaches the ribbon release area, the
Lever, ribbon release is pushed by the ribbon release section, then portion C pushes the Frame,
ribbon ass’y upwaed. At this time, the ribbon switch detent face is released from the Lever,
ribbon switch hole of the Frame, ribbon ass’y, the Lever, ribbon switch is returned to Lever,
ribbon switch position B (shown by the solid lines) by the spring power of the Spring, ribbon
release. When the Carriage sub-ass’y moves in theE direction, the Frame, ribbon ass’y and Lever,
ribbon release are returned to their original positions by the spring power of the Spring, ribbon
frame.
Figure 2-14 Ribbon Switching
Range of ribbon switch Range of ribbon release
Lever, ribbon switch
A
B
E
D
Print head unit
Lever, ribbon
release
Ribbon
switch
section
Ribbon
release
section
Lever, ribbon switch hole
Ribbon switch detent face
Frame, ribbon
push face
C