Canon Color imageRUNNER C4580 Service Manual - page 217
Chapter 8
8-4
8.2 Basic Sequence
8.2.1 Basic sequence of operation
The laser scanner motor starts to rotate when the Start key is turned on (or, in response to the print requset
signal). Thereafter, when the rotation has stabilized, the printer unit becomes ready to form images, indicating
the fact by its sync signal (PTOP).
The machine uses the signal to generate the sub scanning direction signals (Y-TOP, M-TOP, C-TOP, K-TOP)
for individual colors, and turns on the lasers of the corresponding colors.
F-8-4
PSTBY
PSTBY
PINTR
LSTR
Laser Y activation
Laser M activation
Laser C activation
Laser Bk activation
PTOP signal
Y-TOP signal
M-TOP signal
C-TOP signal
Bk-TOP signal
Polygon mirror motor
Y,M,C,Bk
For stabilization
of rotation*1
Print request signal
(Start key ON)
Image formation
ready timing
*1iRC5180:1.6s,IRC4580/3880:1,4s