Rev.D Product Overview Appendix D-15
TM-U675/U675P (with autocutter) Service Manual
Confidential
Roll Paper Feed Mechanism
This mechanism mainly includes the paper feed motor, J/S change assembly, roll paper feed
gears, and the paper feed unit. Paper feeds are performed by switching the power from the
paper feed motor between the roll paper feed and slip paper feed by the J/S change assembly.
This explains the operation for roll paper feeds.
Figure D-23
Roll Paper Insertion Operation (Semi-autoloading)
When the platen lever open/close cam is in the idle position, the sub paper feed rollers and sub
paper hold rollers in the paper feed unit are open. (See "Platen open/close operation" earlier in
this appendix.) When the leading edge of paper is manually inserted into the opening, the
paper end detector built into the paper feed unit detects its presence. The platen lever open/
close cam rotates and the sub paper feed roller and sub paper hold rollers close to grasp the
paper and the rotation of the paper feed motor starts the semi-autoloading.
As shown in Figure D-24, when idling, the platen lever open and close cam holds the platen
lever in the direction of arrow a and the paper guide lever in the direction of arrow c. The
auxiliary paper guide spring force holds the auxiliary paper guide in the direction of arrow e.
When roll paper is inserted and the paper end detector detects the edge of the paper, the lever
drive motor is started and the platen lever open and close guide operates. The platen lever
spring holds the platen lever in the direction of arrow b. The paper guide lever spring holds the
paper guide lever in the direction of arrow d while the paper feed motor drives and starts semi-
Paper feed unit
Main frame
Roll paper feed gears
Paper feed motor
J/S change assembly
Release lever
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