Digital Equipment DEClaser 320, Руководство по обслуживанию

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7.10 Skewed Image
7.10 Skewed Image
Description: The image is not parallel to the edge of the sheet.
Troubleshooting: To measure the skew, print several duplex copies of the
grid test pattern, as shown in Section 3.3, and mark the leading edge. Take
measurements
!
and
"
from the location shown in Figure 7–4. On the
simplex side, the measurements must be within 1.6 mm of each other. On the
duplex side, the measurements must be within 1.8 mm of each other.
If the image is skewed on the sheet, perform the following procedure:
1. Check all paper guides, rollers, transport assemblies. Look for warped
covers, adhesives contamination, wadded shreds of paper, and so on.
2. Make sure the transfer/separation charger is fully seated and locks into
place.
3. Make sure all transports are correctly seated and aligned.
4. If the skewing only occurs when feeding from the LCIT, check the tray
parallelism, as shown in Section 11.3.
5. Inspect the following pinch roller springs:
• Upper and lower turn pinch rollers on the feed door
• Upper registration roller
• Lower (pressure) fuser roller
• Postfuser transport rollers
• Refeed rollers (if duplex feeding)
• Exit pinch roller
6. Make sure the scanner assembly is properly mounted and seated.
7. Do the following if the skew occurs when feeding from one cassette;
a. The paper might be compressed. Remove and fan the paper.
b. Make sure the paper is correctly loaded under the metal corner
snubbers.
c. Make sure the snubbers are not bent and are free of burs.
d. Inspect the pressure and side plates for damage and proper alignment.
e. Swap the cassette.
f. Clean or swap the feed roller. See Section 10.5, Feed Roller Cleaning
Procedure.
7–14 Image Defects FIPs