Canon 1130 Service Manual page 203

CHAPTER 6 IMAGE FORMATION SYSTEM
d. Flow of Control Using the Black Toner Concentration Sensor during Copying
Operation and Its Relate Detail Code
Flow at power-on
1. Starting (Start key ON)
copying
operation
2. Checking the
connector
(disconnection)
3. Detecting dirt (during initial rotation)
on the
window
4. Forming a Forms a patch in the area
black patch coming face-to-face against
on the the linking plate of the
photosensitive transfer drum.
drum
5. Measuring The density of the patch is
concentration measured.
LED on; uses PS1 to check
5.1 Reading
REF-xx light; converts light into
voltage.
5.2 Making a Compares 'REF-xx' (initial
comparison setting) and 'REF-xx' read in
5.1.
and
computation
6-44
COPYRIGHT © 2002 CANON INC.
Flow of operation
CANON CLC1100/1130/1150/1160/1180 REV.2 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
Detail code
xx00
The PS1/PS2 connector is
disconnected.
xx80 The reading is 130 or higher.
xx81 The reading is 70 or lower.
xxA1
The reading is 30% or more lower
than the initial setting REF-xx.
xxB1 The reading is 30% or more higher
than the initial setting REF-xx.
xx62 The initial setting is 777 or lower.
xx72 The initial setting is 859 or higher.
Item of detection