Lexmark X642E, Service Manual, Page: 207 / 525

Diagnostic information
2-169
7002-xxx
Line compression
Note: This problem is usually caused by “shocks” of media entering or exiting any roller pairs.
Wavy lines
Wavy lines seen only on flatbed text or mixed mode up to 300 dpi scans.
FRU Action
1 Media 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.
2 Lower exit guide assembly This can be caused by the impact of the media entering the second
scan area. Replace the lower exit guide assembly. See
“Lower exit
guide assembly removal” on page 4-47 .
3 ADF assembly This can be caused by the shock of the media being released from
the first scan roller. Replace the complete ADF assembly. See
“ADF
complete assembly removal” on page 4-15 .
4 Pick mechanism
Separator arm
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 “Separator assembly torque limiter
removal” on page 4-52 .
5 Flatbed CCD module 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
FRU Action
1 Flatbed CCD module
assembly • Replace the flatbed CCD module assembly. See “Flatbed CCD
module assembly removal” on page 4-28 . If the problems
continue, replace the flatbed scan motor. See “Flatbed scan
motor assembly removal” on page 4-41 .