Konica Minolta bizhub C658 Service Manual page 1799

bizhub C658/C558/C458/C368/C308/C258
[1]
[5]
[1] G2 lens tilting shaft
[3] Skew correction motor
[5] G2 lens drive cam
(3) Skew adjustment method
• The following describe the direction in which the beam moves by the skew correction motors.
• When the skew correction motors rotates, the G3 lens moves in the direction of the arrow that is illustrated below, so that the beam
moves.
• Only cyan uses a greater number of turnover mirrors, one more than yellow or magenta does, which results in the direction in which the
beam moves being different from that of yellow and magenta.
Skew adjustment direction: Direction in which the beam moves when the skew correction motor/Y, M, C rotates clockwise
Y
(4) Skew correction motor adjustment value panel display
[1] Select [Service Mode] -> [Machine] -> [Print Head Skew
Adj.] and call [Adjust Value] (default adjustment value
unique to the print head) to the screen, in steps.
[3] Shows the skew correction value after the image
stabilization process relative to that of the last image
stabilization process, in steps.
(5) Operation timing
• The color registration control (color shift correction) and the color skew correction control operate at one time.
• The adjustment is performed based on the skew amount values for each color that are calculated from the detected sub scanning
registration pattern according to the previous correction value.
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 3. WRITE
[2]
[3]
[4]
M C
[2] G2 lens: The lens is tilted to correct color skew.
[4] Drive gear
- -
K
[2] Shows the skew correction value after the image
stabilization process, in steps.
- -
O-24
SECTION (PH SECTION)