Lexmark C935 Series, Service Manual

Page: 291 / 630

Diagnostic aids
3-23
5057-XXX
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Color registration (RegCon)
The purpose of the color registration is to establish correct horizontal and vertical positioning of the four primary
color images.
The procedure consists of the following steps, which must be performed in the listed sequence:
1. Belt Edge Learn - Used to align the transfer belt positioning system.
2. Fine Skew Setup - Automatically performs horizontal and vertical alignment, and reports any skew in the
various images caused by the printhead misalignment. The skew must be corrected through manual
adjustment.
3. In/Out Setup - Automatically performs magnification adjustment so that scan lines are the same length for
all four colors. Also checks for skew.
4. Center Setup - Aligns the midpoints of scan lines for all colors, for magnification balance. There is also a
Rough Skew Setup when skew is outside the measurement parameters of the Fine Skew Test .
Booklet Fold Adjust
To perform the Booklet Fold Adjust Test:
1. Select Booklet Fold Adjust from the Diagnostics Menu.
The following tests appear on the LCD
Finisher Config
To perform Finisher Config:
•
Select Finisher Config from the Diagnostics Menu.
Finisher Config values appear on the LCD. If required, reset the values and submit
Exiting Diagnostics
From Diagnostics menu, select Back until Exit Diagnostics appears on the LCD. Select Exit Diagnostics to
perform a POR.
Select the following: Appears on the LCD:
Booklet Tamper Shift Adjust Booklet Staple Fold Fine Adjust values appear on the
LCD. If required, reset the values and submit.
Booklet Compile position Booklet Compile position values appear on the LCD. If
required, reset the values and submit.
Booklet 2-sheet Booklet 2-sheet values appear on the LCD. If required
reset the values and submit.
Booklet 15-sheet Booklet 15-sheet values appear on the LCD. If required
reset the values and submit.
Booklet Fold Pos Fine Adj Booklet Staple Fold Fine Adjust values appear on the
LCD. If required, reset the values and submit.
Booklet Staple Pos Fine Adj Booklet Staple Fold Fine Adjust values appear on the
LCD. If required, reset the values and submit.