Print-Quality Troubleshooting 5-11
4
Replace the Laser Unit (page 8-76).
Does the image quality improve?
Complete Go to Step 5.
5
Replace the Engine Control Board
(
page 8-104).
Does the image quality improve?
Complete Go to Step 6.
6
Replace the HVPS (page 8-109).
Does the image quality improve?
Complete Go to Step 7.
7
Check the Developer Assembly gear
train, PL8.1.1, if the symptom is light
density or missing color. Symptoms
can be all colors, only one color, and
only CMY color. If CMY color only is
bad (black is good), this is most likely
the root cause.
Does the image quality improve?
Complete Go to Step 8.
8
Replace the Developer Assemblies for
the affected colors.
Does the image quality improve?
Complete Go to Step 9.
9
Replace the Toner Dispense Assembly
(Toner Cartridge Holder) for the
affected colors (
page 8-85).
Does the image quality improve?
Complete Go to Step 10.
10
Check the Wire Assembly BTR
continuity.
J138 <=> J139.
Go to Step 5. Replace the defective
wire.
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No
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