Xerox Phaser 6300 Service Manual page 222

Troubleshooting Procedure Table (Continued)
Step Actions and Questions
4
Replace the Laser Unit (page 8-76).
Does the image quality improve?
5 Replace the Engine Control Board
(page 8-104).
Does the image quality improve?
6 Replace the HVPS (page 8-109).
Does the image quality improve?
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?
8 Replace the Developer Assemblies for
the affected colors.
Does the image quality improve?
9 Replace the Toner Dispense Assembly
(Toner Cartridge Holder) for the
affected colors (page 8-85).
Does the image quality improve?
10 Check the Wire Assembly BTR
continuity.
J138 <=> J139.
Print-Quality Troubleshooting
Yes
Complete
Complete
Complete
Complete
Complete
Complete
Go to Step 5.
No
Go to Step 5.
Go to Step 6.
Go to Step 7.
Go to Step 8.
Go to Step 9.
Go to Step 10.
Replace the defective
wire.
5-11