Platen Open/Close Operation - Epson TM-U675 Service Manual

Confidential

Platen open/close operation

The platen adjustment screw attaches the platen to the platen lever. The platen opens and closes
to prepare for feeding a slip, check, or validation sheet. When the lever coil is energized while
the lever drive motor rotates, it releases the linkage of the lever ratchet wheel to the paper feed
trigger attraction plate, and the lever drive gear rotates the prescribed amount in the direction
shown by the arrow. This rotation is transmitted by the lever drive transmission gear, rotating
the platen lever open/close cam 180
arrow a around the platen lever shaft, and the platen and slip feed roller open. (See Figure D-8.)
To close the platen, the lever drive coil is energized again while the lever drive motor rotates,
turning the lever drive gear the prescribed amount in the direction of the arrow. This rotates the
platen lever open/close cam 180
b around the platen lever shaft by the slip retainer spring. The slip feed roller and slip hold
roller make contact at this time, closing the platen.
Slip hold roller
Appendix D-6 Product Overview
°
. The platen lever moves in the direction indicated by
°
, and the platen lever is moved in the direction shown by arrow
Platen
Figure D-8
Validation paper
Platen lever shaft
Platen lever
Slip feed roller
Platen lever
drive cam
a
b
Lever drive gear
Lever drive
transmission
gear
Rev.D