Digital Equipment DEClaser 320, Руководство по обслуживанию

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7.9 Misregistration
7.9 Misregistration
Description: If the image is not positioned in the center of the sheet, but is
parallel to the edges of the sheet, a misregistration problem exists.
Troubleshooting: Print several copies of the grid test pattern, as shown in
Section 3.3 and mark the leading edge. If the image is skewed (image is not
parallel to the edge of the sheet) go to Section 7.10.
Refer to Figure 7–3 and measure registration to the following specifications:
!
The vertical registration must be 3.0±2 mm at the leading edge of the
simplex or duplex side.
"
The horizontal registration must be 3.0±2.5 mm simplex side or 3.0±4.0
mm on the duplex side.
If the image is not centered on the test sheet, perform the following procedure:
• The paper might be compressed. Remove and fan the paper.
• The cassette and the metal corner snubbers. Make sure the paper is
correctly loaded under the snubbers.
• Swap the paper cassette.
• Check the registration transport paper guides for adhesives contamination,
wadded shreds of paper, and so on.
• Make sure the transfer/separation charger is fully seated and locked into
place.
• Check the springs that apply pressure to the upper turn pinch rollers. The
upper pinch roller is mounted on the feed door.
• If the vertical registration varies between prints, the registration clutch
might be bad.
• Perform the horizontal or vertical registration adjustment, as shown in
Section 10.3 and Section 10.4.
• If the registration adjustment was ineffective, swap the DC control board.
7–12 Image Defects FIPs