Xerox Phaser 8860, Service Manual

Page: 111 / 316

09/2007
3-19 Phaser 8860/8860MFP Service Manual
IQ24, IQ25
Image Quality Initial Issue
IQ25 Poor Small Text Resolution
This RAP addresses image quality problems associated with the Print Engine. Poor text resolu-
tion typically results from Drum thermal regulation, or X-Axis drive problems. Poor text resolu-
tion is indicated by characters appearing heavy or plugged up as follows:
Figure 1 Example of Poor Text Resolution on Output
Initial Actions
1. Check that supported media is being used.
2. Check the Drum Maintenance Kit.
Procedure
3 Check and clean the Drum Maintenance Kit
Wiper Blade. Replace the kit if necessary.
Run the Service Diagnostics X-Axis tests.
Does the problem persist? Go to Step 4. Complete.
4 Test the Drum Maintenance system.
Run the Service Diagnostics maintenance
system tests.
Does the problem persist? Go to Step 5. Complete.
5 Check these Drum maintenance system parts
for damage or defects:
Drum Maintenance Pivot Plate
Drum Maintenance Cam Shaft
Is there any damage? Replace any dam-
aged parts. If the
problem persists,
go to Step 6. Go to Step 6.
6 Test the Drum temperature regulation.
Run the Service Diagnostics Drum tempera-
ture tests.
Check the Drum Temperature Sensor.
Does the problem persist? Replace the Drum
Temperature Sen-
sor (
REP 6.0.4 ).
Complete.
Table 1 IQ24 Ghosting
Step Questions and Actions Yes No
Table 1 IQ25 Poor Small Text Resolution
Step Questions and Actions Yes No
1 Try using a higher quality print mode.
Does the problem persist? Go to Step 2. Complete.
2 Test the Drum temperature regulation.
Run the Service Diagnostics Drum tempera-
ture tests.
Check the Drum Temperature Sensor.
Does the problem persist? Replace the Drum
Temperature Sen-
sor (
REP 6.0.4 ). If
the problem per-
sists, got to Step 3.
Complete.
3 Check the X-Axis Drive installation and lubri-
cation?
Does the problem persist? Replace the X-Axis
Motor (
REP 4.0.5 ).
Complete.