The copier's editor is of a type referred to as a static editor, consisting of a tablet which enables
reading in horizontal (X) and vertical (Y) directions and a pen switch.
The editor controller PCB reads points pressed by the pen switch as defining a selected area.
The copier's tablet consists of electrode wires arranged at intervals of 6 mm, and the static bond
occurring in response to contact between an electrode wire and the pen switch will be identified as
a specific pen input point.
When the pen switch presses on the tablet, the CPU on the editor controller PCB applies pulses
to each electrode wire through the tablet decoder in a specific direction in terms of 1, 2, ..., n-1, n,
The static bond occurring between the pulse and the pen switch allows the controller PCB to
read the level (strong or weak) of the voltage through the pen switch. (Figure 9-601)
The voltage read in this way is converted into a digital signal by the A/D conversion circuit on
the controller PCB, and is computed into an area (in mm) by the CPU; the result is then sent to the
The copier uses static bonding to detect a point of input, allowing the use of a thick original (4
mm or less). On the other hand, it does not allow the use of an object made of conducting
material, pressure-sensitive paper, or carbon-backed paper.
COPYRIGHT © 1999 CANON INC.
CHAPTER 9 EXTERNALS / AUXILIARY MECHANISMS
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)