Service manual

ENGINE SERVICE MODE
G130/G131 5-64 SM
[Line Adj.] Line Adjustment
5993
Line Positioning Adjustment ([Color])
M: Main-scan, S: Sub-scan, Reg.: Registration, Mag.: Magnification
For example: M Reg = Main scan registration
42 to 044 These SPs adjust the main scan registration when it is in 1200 dpi printing mode.
The polygon motor speed is different between the 1200 dpi printing mode and other
dpi printing modes. Because of this, the registration position of 1200 dpi printing
mode is slightly different from other printing modes.
Example: If magenta is always shifted one dot to the left, reduce 5-993-43 by 1.
5993 042 M: Offset: 1200 [Y] *BCU
5993 043 M: Offset: 1200 [M] *BCU
5993 044 M: Offset: 1200 [C] *BCU
[ –128 to 127 / 0
/ 1 /step] FA
45 to 47 These SPs adjust the main scan registration by 1/16 dot when it is in 1200 dpi
printing mode.
5993 045 M Offset 2 1200 [Y] *BCU
5993 046 M Offset 2 1200 [M] *BCU
5993 047 M Offset 2 1200 [C] *BCU
[ –15 to 15 / 0
/ 1/16dot /step] FA
5993 048 Pulse: Y *BCU
5993 049 Pulse: M *BCU
5993 050 Pulse: C *BCU
Displays the correction pulse value of the
main-scan magnification for yellow, cyan and
magenta adjusted by the line position
adjustment.
51 to 53 Specifies the correction pulse value at the center of the image. This SP is used
when color registration errors occur at the center of the main scan but not at the
sides, after the line position adjustment is done. The values of these SPs are added
to the correction values that are adjusted by the center ID sensor when doing the
line position adjustment.
• A "–" value shifts the image to the front side of the machine (left side of the
image).
• A "+" value shifts the image to the rear side of the machine (right side of the
image).
5993 051 D Mag Offset [Y] *BCU
5993 052 D Mag Offset [M] *BCU
5993 053 D Mag Offset [C] *BCU
[ –1023 to 1023 / 0
/ 1 pulse /step] FA
D Mag Adj *BCU [ 0 or 1 / 1 / – ] DFU
0: Disable, 1: Enable
5993 054
Enables or disables the main-scan magnification adjustment with the center ID
sensor. When this SP is at "0", main-scan correction is done only with the rear and
front ID sensor during the line position adjustment.
FC Prejob Music *BCU [ 0 to 999 / 0 / 1 sheet /step] 5993 055
Specifies the threshold for the line position adjustment when changing from black
and white printing and copying mode to color printing mode. When color printing
starts after the counter has got to the value set by this SP, the line position
adjustment is done before the color printing starts.
If the line position adjustment is done because of other conditions, the counter of
this SP is cleared.