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Color missing
Table 7-30. Causes for a missing color
Cause Solution
Defective laser shutter. Check the problem color laser shutter. Clean the
shutter if dirty. Replace the shutter if deformed or
damaged.
Poor developing bias contacts. For the cartridge with the color problem (color
missing) color’s cartridge, check the developing
bias contacts to the high-voltage PCB. Clean
contacts, if dirty. Replace defective parts if the
contacts are deformed or damaged.
Defective cartridge (primary charging roller). Replace the problem (color missing) color
cartridge.
Laser/scanner unit is defective. Replace the laser/scanner for any missing color.
Calibrate the printer after replacing the laser/
scanner. See
Calibrate Now, later in this chapter.
High-voltage PCB is defective. Replace the high-voltage PCB.
DC controller PCB is defective. Replace the DC controller PCB. Calibrate the
printer after replacing the DC controller. See
Calibrate Now, later in this chapter.
Blank spots
Table 7-31. Causes for blank spots
Cause Solution
Poor secondary transfer bias contacts. On the secondary transfer roller, check the bias
contacts to the high-voltage PCB. Clean contacts,
if dirty. Replace defective parts if the contacts are
deformed or damaged.
High-voltage PCB is defective. Replace the high-voltage PCB.
DC controller PCB is defective. Replace the DC controller PCB. Calibrate the
printer after replacing the DC controller. See
Calibrate Now, later in this chapter.
Poor fusing
Table 7-32. Causes for poor fusing
Cause Solution
Media is not within specifications. For example,
media that is too thick causes poor fusing.
Use media that meets specifications. See F, in
chapter 1.
ENWW Image defects 397