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e-STUDIO3511/4511 REVOLVER UNIT 13 - 6 November 2003 © TOSHIBA TEC
13
13.6.5 Color toner supply
1. The color developer unit whose toner needs to be supplied moves to the developing position.
2. The developer unit is driven and the toner is supplied for a regulated period of time.
3. The drive is stopped and the unit moves to the color toner density detection position to detect the
density.
4. When the toner density detected is higher than the regulated value, it moves to the escape position.
When the toner density detected is lower than the regulated value, it repeats the procedure 1 to 3 for
five times. If the toner density is still lower than the regulated value, it is judged as “toner empty” and
the unit moves to the escape position.
5. Procedure 1 to 4 is repeated for other color developer units when the toner supply is needed.
13.6.6 During image quality control
1. A black test pattern is formed on the transfer belt while the revolver unit is at the escape position.
2. The revolver unit moves to the cyan developing position after the completion of the black image
development and a cyan test pattern is formed.
3. It moves to the magenta developing position after the completion of the cyan image development
and a magenta test pattern is formed.
4. It moves to the yellow developing position after the completion of the magenta image development
and a yellow test pattern is formed.
5. It moves to the escape position after completion of the yellow image development.
6. The image quality sensor reads the image density of four colors and feedbacks to the image quality
control.
7. Procedure 1 to 7 is repeated for one to six times until the specified gradation characteristic and
image density are obtained.