Canon CLC 1120 Service Manual page 199

f. Flow of Control Using the Color Toner Concentration Sensor during Copying
Operation and Its Related Code
(The notation "xx" of detail code indicates the color of developing assembly; e.g., xx=01: M,
xx=02: Y, xx=03: Y)
Initial setting
1. Starting
copying
operation
2. Checking
the connector
(disconnection)
3. Measuring the
concentration
3.1 Reading
REF- M/C/Y
3.2 Making a
comparison
and
computation
3.3 Reading
SGNL-M/C/Y
3.4 Making a
comparison
and
computation
COPYRIGHT © 1999 CANON INC.
Flow of
operation
(Copy Start key
ON)
Measures the
concentration of
developer.
LED on; uses
PS1 to check
light; converts
intensity into
voltage.
Compares the
initial setting
REF-M/C/Y and
REF-M/C/Y read
in 3.1.
LED on; uses
PS2 to check
light; converts
light into voltage.
Compares the
initial setting
SGNL-M/C/Y
and SGNL-M/C/
Y read in 3.3.
Developing cylinder
Photosensor (PS1)
Figure 6-413
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
Detail code
xx00
The PS1/PS2 connector is disconnected.
xx91
The level of variation in one sample is 102
or higher.
xxA1
The result is 30% or more lower than the
initial setting REF-M/C/Y.
xxB1
The result is 30% or more higher than the
initial setting REF-M/C/Y.
xx61
The initial setting is 200 or lower.
xx71
The initial setting is 930 or higher.
xx90
The level of variation in one sample is 102
or higher.
xxA0
The reading is 306 or lower.
xxB0
The reading is 1020 or higher and
continues to be so 10 times or more.
xx60
The reading is 777 or lower.
xx70
The reading is 859 or higher.
xxC0
The result is +3.00% or higher 20 times or
more continuously as compared with the
initial setting SGNL-M/C/Y.
xxD0
The result is -3.00% or lower 20 times or
more continuously as compared with the
initial setting SGNL-M/C/Y.
xxE0
The result is -5% or higher than the initial
setting SGN-M/C/Y.
Color toner
concentration sensor
Photosensor (PS2)
Items of detection
6-47