Olivetti d-Color MF4003 Service Manual page 584

d-Color MF4003/MF3303
[1] IDC sensor (IDCS)
(b) Correction of color shift in the main scan direction
• If the image of each color (Y, M, C) is misaligned with respect to the image of black (K) in the main scan direction, changing the write
start timing in the main scan direction can correct the color shift. Color shift correction needs to be performed separately for the
respective colors (Y, M, C).
• Color shift correction control is activated when the image stabilization sequence is started.
* When the image of magenta is misaligned with respect to the image of black (K)
[2]
[1]
[1] Rotational direction of the transfer belt
[3] Color shift
[5] Magenta (M)
[7] Before correction
(c) Correction of color shift in the sub scan direction
• If the image of each color (Y, M, C) is misaligned with respect to the image of black (K) in the sub scan direction, changing the write
start timing in the sub scan direction can correct the color shift. Color shift correction needs to be performed separately for the
respective colors (Y, M, C).
• Color shift correction control is activated when the image stabilization sequence is started.
* When the image of magenta is misaligned with respect to the image of black (K) in the sub scan direction
[2]
[1]
[1] Rotational direction of the transfer belt
[3] Black (K)
[5] Magenta (M)
[7] Before correction
Service Manual
[1]
[2]
[7]
[3]
[4] [5]
[7]
[3]
[4]
[6]
[5]
P-10
P THEORY OF OPERATION > 1. d-Color MF4003/MF3303
[2] Transfer belt
[8]
[6]
[2] Transfer belt
[4] Black (K)
[6] No color shift
[8] After correction
[8]
[2] Transfer belt
[4] Color shift
[6] No color shift
[8] After correction
Y119930-3