Image Quality
Phaser 7100 Service Manual Xerox Internal Use Only3-44
3. Check the Imaging Unit installation.
Remove the Imaging Units (Y/ M/ C/ K) (REP 6.0
Imaging Unit (Y/ M/ C/ K) on page 4-121).
Is the Imaging Unit (Y/ M/ C/ K) installed
properly, with no deformation and
contamination at the contact points and it is in
contact with the left and right Guides?
Go to step 4. Inspect and clean the
contact points.
Reinstall the Imaging
Units (Y/ M/ C/ K) (REP
6.0 Imaging Unit (Y/
M/ C/ K) on
page 4-121).
4. Check the surface of the CTD Sensor for
contamination and debris (REP 9.9 CTD Sensor
Assembly on page 4-175).
Is there any contamination or debris at the
Sensor surface of the CTD Sensor Assembly?
Clean the CTD Sensor
surface and remove
any debris.
Go to step 5.
5. Replace the IBT Unit (REP 9.10 IBT Unit on
page 4-177).
Does the error persist?
Go to step 6. Troubleshooting
complete.
6. Check the Laser Unit.
Use paper to cover half of the Laser Unit window
and resend a print job.
Is the printout half white and half black?
Note: If the Laser Unit is normal, the half will
have the test pattern printed on it instead of
being solid black.
Replace the Laser Unit
(REP 7.1 ROS Assembly
(Laser Unit)/ Front
Spring Assembly/ Right
Rear Spring Assembly/
Left Rear Spring
Assembly on
page 4-130).
Replace the MCU PWB
(REP 12.4 MCU PWB
on page 4-206).
Troubleshooting Procedure (Continued)
Step Actions and Questions Yes No
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