Editor; Outline; Operations - Canon CLC 1120 Service Manual

VI. EDITOR
A. Outline
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.
B. Operations
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,
n+1.
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
copier.
Reference:
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)
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