Xerox WC5545F, Service Manual

Page: 1010 / 2320

August 2007
3-20
WorkCentre 5687 Family
IQ8
Image Quality RAPs
IQ8 Skew RAP
Use this RAP to determine the source of skew.
Ensure IQ1 Image Quality Entry RAP is performed before starting this RAP.
Procedure
Enter dC606. Use the internal test pattern 16 and select 1 Sided. Make 5 prints. Check the
prints for skew, IQS 5 Skew. The prints are skewed.
Y
N
Use the internal test pattern 16 and select 2 Sided. Make 5 prints. Check the prints for
skew, IQS 5 Skew. The prints are skewed.
Y
N
Use a print of the internal test pattern 16 as a master and make 5 copies from the
document glass. Check the copies for skew. The copies are skewed.
Y
N
Use a print of the internal test pattern 16 as a master and make 5 copies fed
through the DADH. Check the copies for skew. The copies are skewed.
Y
N
No skew is present. Re-define the image quality defect. Refer to IQ1
Image Quality Entry RAP.
The skew is originating in the DADH. Go to ADJ 5.7 DADH Skew Adjustment.
There is a skew problem originating in the scanner, (32-55 ppm) PL 14.20 and PL
14.25 or (65-87 ppm) PL 14.10, PL 14.15 and PL 14.16.
Complete a visual check of the following:
• (32-55 ppm) The mirrors are not loose and are held in the correct position by
the spring clips.
• (32-55 ppm) The scan carriage is not damaged and moves freely.
• (65-87 ppm) The scan carriage is parallel to edge of the document glass. If
necessary, perform ADJ 14.2B Scan Carriage Assembly (65-87 ppm).
• The scan cables are wrapped around their drive pulleys, refer to REP 14.10A
Scan Idler Pulleys (32-55 ppm) or REP 14.7B Scan Cables (65-87 ppm).
• If necessary, install a new scanner, (32-55 ppm) PL 14.20 Item 1 or (65-87
ppm) PL 14.10 Item 1.
The skew occurs in the duplex paper path.
• Check the nip and drive rolls in the inverter assembly, (32-87 ppm) PL 10.12 and
(65-87 ppm) PL 10.14.
• Check the drive and idler rolls in the duplex transport, (32-55 ppm) PL 8.22 Item 7 or
(65-87 ppm) PL 8.20 Item 7.
• Install new components as necessary.
Using the prints made from dC606, check the prints for distortion by measuring between the
lines produced. The lines are parallel to each other.
Y
N
Install a new ROS, PL 6.10 Item 4.
Make five prints from each tray and the bypass tray to identify the source of skew.
• Check the feed rolls and guides for contamination.
• Check the feed rolls and transport rolls for wear. Install new parts as necessary.
• Check that there is no variation in the size or weight of the sheets of paper in each tray.
• Check that the paper weight and type is within the specification. Refer to GP 20 Paper
and Media Size Specifications.
• Check that the paper size guides are set correctly.
• Check the separator strips on the paper tray for wear. Refer to OF8 Multifeed RAP.
• Check that the buckle setting are set at default. Go to dC131a NVM tables and refer to the
chain 8 table and check that the buckle settings are set to default.
• Check that the bypass tray width guides are set correctly.
• Open the left hand door and check for wear on the ribs, Figure 2. If necessary install a
new bypass tray and left hand door assembly, PL 7.30 Item 1.
• Check that the interlock cover is not loose, PL 7.30 Item 23. If necessary bias the cover to
the right and tighten the two screws.
• Check the paper paths for obstructions. Refer to IQ5 Print Damage RAP.
• Check the registration clutch. Refer to 08-150A, 08-151A Registration Jam RAP.
Figure 1 Document path through the DADH
CVT glass
Document width guides
Document path
A
A