2.13 Color Misalignment Detection
Reflection-type optical sensors (Z71-PCB) are mounted at the right and left ends of the belt, respectively, in front of the toner scraping (cleaning) blade which is at the back of the belt unit. The color misalignment detection pattern is printed on the belt at the right and left ends each and, by reading the patterns by the reflection-type optical sensors, the misalignment amounts are measured with respect to Black to determine correction values. Then, the misalignment in main- scanning, sub-scanning and slanting directions is corrected.
These operations are performed at power-on, at cover-close and every 400 pages.
LED head
CMYK
ID
CMYK
Transfer belt
Belt running direction
Color alignment sensors L and R
Cleaning blade
Transfer Belt
Color alignment sensor R
Belt running direction
Color alignment sensor L
(Bottom View)
Cleaning blade
