Error Code Related To New Gradation Correction Control (E020) - Canon 1130 Service Manual

CHAPTER 6 IMAGE FORMATION SYSTEM

4. Error Code Related to New Gradation Correction Control (E020)

Although used primarily for faults associated with toner concentration, 'E020' is also used for
faults related to gradation.
'020' and its detail code as used in relation to the gradation sensor are described for the
following:
a. Gradation sensor; flow of making initial setting and related detail code (at time of
shipment and sensor replacement)
b. Gradation sensor; flow of making initial settings and related detail code (at time of auto
gradation correction)
c. Gradation sensor control flow during copying operation and related detail code
a. Gradation Sensor: Flow of Making Initial Settings and Related Detail Code (at time of
shipment, sensor replacement)
(The notation "xx" in detail code indicates the color of developing assembly; xx=01:M,
xx=02:C,xx=03:Y)
Initial settings
1.Sensor replacement
2.Initial setting
2-1. Drum
rotation
2-2. P-SENS-Y/
M/C/K
reading
3.End
6-46d
COPYRIGHT © 2002 CANON INC.
Flow of operation
The gradation sensor is
replaced.
(FUNCTION>SNS-ADJ>P-
SENS).
The photopositive drum is
rotated..
On the surface of the
photosensitive drum, a solid,
sample color toner image
(patch image; each color) is
formed, and the LED is
tuned on; using the sensor
(PS), the reflected light is
checked in terms of changes
in voltage (i.e., intensity),
thereby setting P-SENS.
End if the reading of P-
SENS-Y/M/C/K is as
indicated.
(ADJUST>DENS>P-SENS-
Y/M/C/K)
Table6-412c
Photosensitive drum
Photo sensor (PS)
Figure6-412c
CANON CLC1100/1130/1150/1160/1180 REV.0 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
Detail code
---
---
---
xx25 The reading of P-SENS-Y/M/
C/K is 256 or lower.
xx35 The reading of P-SENS-Y/M/
C/K is 800 or higher.
Gradation sensor (PS73)
Items of detection