Operation; Home Position Detection; Escape Position Movement; During Warming-Up - Toshiba e-STUDIO281c Service Manual

13.6 Operation

13.6.1

Home position detection

The revolver unit detects its home position at every warming-up after the power is turned ON or the
front cover is opened/closed since this unit is driven by the stepping motor. The home position is the
point where the revolver home position sensor (S8) detects the shielded part in the revolver unit.
13.6.2

Escape position movement

The color developer units (C, M and Y) are escaped from the developing position when developing
black image by rotating the revolver unit. This escaping movement is performed after every home posi-
tion detection. The escape position is where these color developer units are during warming-up. The
movement always starts from the escape position when printing starts.
13.6.3

During warming-up

The home position detection and escape position movement are performed consecutively during warm-
ing-up. Then the revolver unit operations such as toner supply and image quality control are performed
according to the conditions of the equipment.
13.6.4

During printing

The revolver unit moves in order, as follows:
Escape position (black image development)→Cyan image developing position → Magenta image
developing position→Yellow image developing position→Escape position (printing completed) In addi-
tion to the basic movement mentioned above, the revolver operations such as toner supply and image
quality control are performed according to the conditions of the equipment.
1) Image quality control is performed immediately before the printing operation according to the condi-
tions of the equipment.
2) The revolver unit stays at the escape position to perform the black image development.
3) The revolver unit moves to the cyan image developing position after the completion of black image
development.
4) The cyan developer unit is driven and performs developing. At the same time, the density of
magenta toner is detected and the detection result is stored in memory.
5) The revolver unit moves to the magenta image developing position after the completion of cyan
image development.
6) The magenta developer unit is driven and performs developing. At the same time, the density of yel-
low toner is detected and the detection result is stored in memory.
7) The revolver unit moves to the yellow developing position after the completion of magenta image
development.
8) The yellow developer unit is driven and performs developing. At the same time, the density of cyan
toner is detected and the detection result is stored in memory.
9) The revolver unit moves to the escape position to perform black image development after the com-
pletion of yellow image development.
e-STUDIO281c/351c/451c
REVOLVER UNIT
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