Rev. A Product Overview Appendix D-9
TM-H6000/H6000P Service Manual
Confidential
Figure D-12
Bottom of form (B.O.F.) detection mechanism
The B.O.F. detection mechanism detects whether or not slip paper has been inserted, and the
rear edge of the paper when printing is performed.
The mechanism is located near the right end of where paper is inserted to ensure it can
determine whether or not a slip has been inserted and for proper positioning.
The B.O.F. detector is comprised of an LED and photo resistor. When a paper slip is inserted,
the light rays between the LED and photo resistor are interrupted, resulting in a change in the
photo resistor output level.
This change in output level is used as a detection signal to determine whether or not a slip has
been inserted.
Figure D-13
Top of form (T.O.F.) detection mechanism
The T.O.F. detection mechanism detects whether or not a slip has been inserted. The mechanism
is located near the top (before the form stopper) to ensure it can determine whether or not a slip
has been inserted and for proper positioning.
Carriage belt
Carriage drive pulley
Screening plate
Carriage drive
transmission gear
Carriage transmission pulley
Carriage motor gear
Carriage detector
GND
High
+5V
GND
Low
When light is
interrupted
When light is emitted
Printer side
Paper guide
Slip paper
Slip paper
Document table
B,O,F detector assembly
Signal level at point A
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