Canon 1000 Service Manual page 240

Color laser copier
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3. OPERATION AND TIMING
Decoder : X
L =
(n - 1)
1
n - 1
Vn - 1
Figure 3-802
3-196
COPYRIGHT © 2001 CANON INC.
Amplifica-
tion
Decoder : Y
CPU
Figure 3-801
x
: line pitch
n
n + 1
Vn
Vn + 1
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
A/D converter
Vn-1
Peak
Vn
hold
Vn+1
Controller PCB
Output (to the copier)
Reference:
To identify the point of input,
Pulses are applied to electrode wires in a
specific sequence (1, ..., n-1, n, n+1).
Maximum value Vn occurs at the nth
electrode wire.
L: L (n-1)
L: wire interval
Vn- (Vn-1)
Vn- (Vn+1)
= S is obtained, and x is computed from the
data table through reverse operation.
L ± x mm is obtained.
When . . . n, n+1,
When . . . n, n-1,

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