Xerox WorkCentre 5687 Series, Service Manual, Page: 1003 / 2320

August 2007
3-13
WorkCentre 5687 Family
IQ2
Image Quality RAPs
Perform the following:
– Check that the fuser roll is cleaned and lubricated by the fuser web. Go to IQ4 Fuser
Module RAP
– Check the fuser web motor, refer to the 10A Fuser Web Motor RAP
• Part images and missing images. Go to 05C Document Size Sensor Failure RAP.
• Print damage. Go to the IQ5 Print Damage RAP.
• Repeat image defects. Perform the following:
– If the distance between repeated defects in the process direction on A3
(11X17inches) printed images is 264 mm, install a new xerographic module, (32-38
ppm) PL 9.22 Item 2 or (45-87 ppm) PL 9.20 Item 2.
– If the repeated distance between defects is 110 mm (35-55ppm) or 126mm (65-
87ppm), go to the IQ4 Fuser Module RAP.
– If there other defects that are repeated in sequential images, install a new xero-
graphic module, (32-38 ppm) PL 9.22 Item 2 or (45-87 ppm) PL 9.20 Item 2.
• Residual image. Perform the following:
– If the repeated residual image on A3 (11X17 inches) paper is 264 mm, install a new
xerographic module, (32-38 ppm) PL 9.22 Item 2 or (45-87 ppm) PL 9.20 Item 2.
– If the problem persists, go to the IQ3 Xerographic RAP
• Rotated image. Go to the 14A Scanning Document Size Entry RAP.
• Scrambled image. Check the connections on the ROS data cable, PJ228 on the Image
processing PWB and PJ122 on the ROS, PL 3.10 Item 15. Refer to Wiring Diagram 9.
Check for a loose or missing bias connection to the halo guide, PL 8.15 Item 23. A bad
connection can cause arcing and show on the print as a scrambled image.
• Skew. Refer to the IQS 5 Skew and the IQ8 Skew RAP.
• Skips. Skips are associated with a variation in the relative scan speed of the projected
image and the rotation speed of the photoreceptor.
Refer to the IQS 6 Copy / Print Defects. Go to the IQ3 Xerographic RAP
• Smears. Smears are associated with a variation in the rotation speed of the photorecep-
tor or speed of the paper.
Refer to the IQS 6 Copy / Print Defects. Go to the IQ3 Xerographic RAP
• Smudges. They are caused by the unfused image being disturbed. Go to the IQ3 Xero-
graphic RAP.
• Streaks. The result of disturbance either before or after image transfer. Go to the IQ3
Xerographic RAP.
• Stretched and distorted images. Perform the following:
– If the defect is present on Fax, Scan to E-mail or Scan to File, send the job at a
higher resolution. Select fine or super fine resolution.
– Check for the paper stalling or catching as it passes under the xerographic drum.
– Check for wear or damage on the transport rolls.
– Check the document feed, refer to IQ7 DADH, Document Glass and Scanner RAP.
Perform the DADH checkout.
• Toner contamination on the back of prints. Perform the following:
– Clean the lower bias guide, PL 8.15 Item 22 and the registration nip assembly, PL
8.15 Item 5.
– Clean the transfer / detack corotron, Figure 1.
– If the transfer / detack corotron was contaminated with toner, perform ADJ 9.3 Mag-
netic Developer Seal Brush Adjustment.
– Clean the short paper path assembly, (32-38 ppm) PL 9.22 Item 3 or (45-87 ppm) PL
9.20 Item 3.
– If the problem persists go to the IQ3 Xerographic RAP.
• Uneven Density. Perform the following:
– If the uneven density occurs at 20 mm (0.75 inches) intervals in a band along the
lead edge of the paper, perform the following:
Enter Diagnostics, GP 1. Enter dC131. Refer to chain 9 NVM xerographic set-
ting values 09-015 and 09-018. Ensure the values are set to default.
Refer to IQS 1 Solid Area Density, to check for the correct density.
Install a new transfer/detack corotron, (33-38 ppm) PL 9.22 Item 8 or (45-87
ppm) PL 9.20 Item 2.
CAUTION
If the NVM values are increased, paper stripping faults can occur. The faults can
include damage to the lead edge of the paper, paper jams, stripper finger contamina-
tion and marks on copies.
If the uneven density is still present, enter Diagnostics, GP 1. Enter dC131.
Refer to chain 9 NVM xerographic setting values 09-015 and 09-018. Increase
both values in increments of 5 to a maximum of 150.
– Check that the developer assembly has been correctly installed, REP 9.2.
– ADJ 6.1 ROS Window Cleaning Procedure.
– ADJ 6.2 ROS Cleaning Procedure.
– If problem persists go to IQ3 Xerographic RAP.
• Unfused prints. Refer to the IQS 3 Fusing and IQ4 Fuser Module RAP.