Poor Primary Color Fills - Xerox Phaser 8400 Service Manual

Poor Primary Color Fills

Step Questions and Actions
1 1. Banded and inconsistent primary fills may
indicate a missing, weak, or discolored jet.
2. Print the Service Test Print 1: Weak/Missing
Jet.
3. If there are discolored jets, print the solid fill
test print in the color with the discolored jets.
4. Did this correct the problem?
2 1. Use service diagnostics to verify the Y-axis
encoder is operating normally.
2. Is the Y-axis encoder working properly?
3 1. If the bands are uniform, or in a corduroy
pattern, use diagnostics to check the X-axis
motion.
2. Ensure the x-axis movement is not impeded.
3. See "White Stripes (Pinstripes)" on
page 5-30 for troubleshooting this problem.
4. Did this correct the problem?
4 1. Try the procedure listed on "Black, Red,
Green, Blue, Cyan, Magenta, and Yellow
Solid Fills" on page 5-40.
2. Did this correct the problem?
Print-Quality Troubleshooting
Primary fills appear banded and
inconsistent.
s8500-039
Yes
Complete. Go to Step 2.
Go to Step 3. Clean the drum
encoder disk or
replace the
drum assembly.
Go to Step 4. Replace the X-
axis motor or
electronics
module.
Complete.
No
5-19