Xerox WorkCentre 5687 Series Service Manual page 1646

ADJ 6.2 ROS Cleaning Procedure
Purpose
To improve the image quality.
NOTE: Only perform this procedure if directed to, from an Image Quality RAP.
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
Take care during this procedure. Sharp edges may be present that can cause injury.
CAUTION
Ensure that E.S.D. procedures are observed during this procedure.
CAUTION
When rotating the polygon mirror, do not press down on the polygon mirror. Do not move any
other components. The components are aligned during manufacture.
CAUTION
Contamination of the inside of the ROS can cause image quality defects. Ensure the inside of
the ROS is clean before the top cover is replaced.
1. Remove the ROS, REP 6.1.
2. Remove the top cover from the ROS (5 torx head screws).
CAUTION
Do not attempt to clean the ROS laser diode.
3. Refer to Figure 1. Refer to Cleaning Methods. Inspect the inside of the ROS. As neces-
sary, clean the inside of the ROS, the mirrors, the polygon mirror, the lens and the surface
of all glass components
NOTE: Carefully rotate the polygon mirror for access to all sides.
4. Install the ROS top cover.
5. Install the ROS, REP 6.1.
Repairs/Adjustments
ADJ 6.2
Cleaning Methods
Do not break the glass. Broken glass can cause injury.
Do not use the toner vacuum cleaner near the ROS window. The glass is flexible and can
break.
1. Use a toner vacuum cleaner to carefully clean metalwork inside of the ROS.
2. Use a clean, dry cotton tip to remove the contamination from glass components.
3. If the contamination remains, use a cotton tip dampened with film remover, PL 26.10 Item
4.
4. Start from the center of each component and carefully clean towards the outside edge.
ROS window
See CAUTION.
Lens.
Polygon mirror.
See CAUTION.
Figure 1 ROS component location
August 2007
4-626
WARNING
CAUTION
ROS laser diode.
See CAUTION.
Mirrors.
WorkCentre 5687 Family