Lexmark X642e Service Manual page 207

Line compression
Note: This problem is usually caused by "shocks" of media entering or exiting any roller pairs.
FRU
1 Media
2 Lower exit guide assembly
3 ADF assembly
4 Pick mechanism
Separator arm
Flatbed CCD module
5
Wavy lines
Wavy lines seen only on flatbed text or mixed mode up to 300 dpi scans.
FRU
1 Flatbed CCD module
assembly
Action
Measure the distance from the leading or training edge of the media
to the compression.
• If the distance is approximately 53mm from the leading edge, go
to step 2.
• If the distance is approximately 57mm from the leading edge of
the media, go to step 3.
• If the distance is approximately 137mm from the training edge of
the media, go to step 4.
This can be caused by the impact of the media entering the second
scan area. Replace the lower exit guide assembly. See
guide assembly removal" on page
This can be caused by the shock of the media being released from
the first scan roller. Replace the complete ADF assembly. See
complete assembly removal" on page
This can be caused by the shock of paper release from the feed/
separator roller. Replace the following FRUs in the order listed:
• Pick mechanism. See "ADF pick assembly removal" on
page 4-7.
• Separator assembly. See
removal" on page 4-52.
This problem can be caused by flatbed motor vibration and will
usually appear at the left or right edges of a scan.
Replace the following FRUs in the order shown:
• Flatbed CCD module
• Flatbed scan motor
Action
• Replace the flatbed CCD module assembly. See
module assembly removal" on page
continue, replace the flatbed scan motor. See
motor assembly removal" on page
"Lower exit
4-47.
4-15.
"Separator assembly torque limiter
"Flatbed CCD
4-28. If the problems
"Flatbed scan
4-41.
Diagnostic information
7002-xxx
"ADF
2-169