Xerox WorkCentre 5687 Series, Service Manual, Page: 1005 / 2320

August 2007
3-15
WorkCentre 5687 Family
IQ3
Image Quality RAPs
IQ3 Xerographic RAP
Use this RAP to determine the cause of the image quality problem.
Ensure IQ1 Image Quality Entry RAP is performed before starting this RAP.
Initial Actions
Perform the following checks and if necessary, install new components:
• Check that the photoreceptor fan is working. If the fan is working, air will be drawn into the
air intake. If necessary refer to the 09C Photoreceptor Fan RAP and the OF6 Ozone and
Air Systems RAP.
• (65-87 ppm) Check that the duplex cooling fans are working, refer to the OF6 Ozone and
Air Systems RAP.
• Check that the relative humidity sensor is working. Go to 09-365 Relative Humidity Sen-
sor Failure RAP.
• Perform ADJ 9.4 Xerographics Cleaning.
• Check the registration / developer bias harness connection, (32-55 ppm) PL 9.17 Item 6
or (65-87 ppm) PL 9.15 Item 6. Figure 1.
• Check that the corotron lead connections to the HVPS are secure, PL 1.10 Item 5. If nec-
essary, refer to 09-060 HVPS Faults RAP.
• Check for loose ground connections. Go to the 01A Ground Distribution RAP.
Make prints. If the image quality defect is still present perform the procedure.
Procedure
WARNING
Switch off the electricity to the machine, GP 14. Disconnect the power cord from the
customer supply while performing tasks that do not need electricity. Electricity can
cause death or injury. Moving parts can cause injury.
WARNING
Follow the service procedure exactly as written. Use of controls or adjustments other
than those specified in this manual, may result in an exposure to invisible laser radia-
tion. During servicing, the invisible laser radiation can cause eye damage if looked at
directly.
The following components can cause image quality defects. Perform the checks:
• Xerographic Module and Short Paper Path Checkout
• Developer Assembly Checkout
• Fuser Module Checkout
• ROS Checkout
• Scanner Checkout
Xerographic Module and Short Paper Path Checkout
• Check the xerographic module stripper fingers for wear, damage and contamination. If
necessary install a new xerographic module, (32-38 ppm) PL 9.22 Item 2 or (45-87 ppm)
PL 9.20 Item 2.
NOTE: When a new xerographic module is installed then the transfer / detack corotron.
must be changed at the same time.
• Hold the xerographic module and view the rear end. Check the toner reclaim drive cou-
pling is free to rotate in a clockwise direction. If the black drive coupling does not rotate
freely, install a new xerographic module, (32-38 ppm) PL 9.22 Item 2 or (45-87 ppm) PL
9.20 Item 2.
• Check the surface of the photoreceptor is not chipped, scored or scratched. The damage
can be caused by the covers on the end blocks of the transfer / detack. Check that the
covers are locked in position. Check that the halo guide is not in contact with the drum.
If the photoreceptor is damaged, install a new xerographic module, (32-38 ppm) PL 9.22
Item 2 or (45-87 ppm) PL 9.20 Item 2.
• Check that there is continuity between the halo guide and the registration guide, Figure 1.
Raise and lower the short paper path assembly, PL 10.25 Item 1, several times to ensure
that the continuity is consistent. If the continuity is inconsistent, examine the registration
and halo guide bias contact for deformation, PL 8.15 Item 23. Figure 1.
• If the transfer / detack corotron, Figure 1, is contaminated with toner. Perform the Devel-
oper Assembly Checkout.
• Raise and lower the short paper path assembly, PL 10.25 Item 1, to ensure that the trans-
fer / detack corotron is parallel to the photoreceptor. Check that the movement of raising
the short paper path assembly is smooth, REP 10.1.
Developer Assembly Checkout
• Operate the xerographic module latch, (32-38 ppm) PL 9.22 Item 7 or (45-87 ppm) PL
9.20 Item 7. Check the operation of the latch mechanism. Check the operation of the
developer paddle, (32-38 ppm) PL 9.22 Item 14 or (45-87 ppm) PL 9.20 Item 14.
• Check that the developer assembly moves freely and rests against the xerographic mod-
ule, refer to REP 9.2 Developer Assembly.
• Check the magnetic developer brush seal for a uniform profile. Refer to ADJ 9.3 Devel-
oper Magnetic Seal Brush Adjustment.
• If the transfer / detack corotron, Figure 1, is contaminated with toner, perform ADJ 9.3
Magnetic Developer Seal Brush Adjustment.
• Install a new developer module, (32-55 ppm) PL 9.17 Item 2 or (65-87 ppm) PL 9.15 Item
2.
After a new developer module has been installed, check the image quality. Run the inter-
nal test pattern 2 and 5, run 25 of each. If there is an image quality problem, install a new
xerographic module, (32-38 ppm) PL 9.22 Item 2 or (45-87 ppm) PL 9.20 Item 2.
Fuser Module Checkout
• Check the fuser rolls and stripper fingers for toner and developer contamination. If con-
tamination is present, go to the IQ4 Fuser Module RAP.
ROS Checkout
• Perform ADJ 6.1 ROS Window Cleaning Procedure.
• Perform ADJ 6.2 ROS Cleaning Procedure.
• Check there are no obstructions between the ROS and the photoreceptor window.
• Check the connection PJ122, (32-55 ppm) Wiring Diagram 8 or (65-87 ppm) Wiring Dia-
gram 9 and the ROS power distribution / communication harness, PL 6.10 Item 5, from
the ROS to the image processing PWB.
• Check that all the connections to the image processing PWB are good, GP 7.
• Check that the ROS securing screw is tight, refer to REP 6.1 ROS.
Scanner Checkout
Check the exposure lamp (32-55 ppm) PL 14.25 Item 9 or (65-87 ppm) PL 14.15 Item 2.