2-44 Service Manual
5025-2xx, 4xx
Print quality—blank page
Step Questions / actions Yes No
1 Is all the packing material for the imaging unit
in question removed?
Go to step 2. Remove the packing
material.
2
Print a document that requires all four colors
with just a few characters to verify if one
specific color is a problem. For example, print
the Print Quality Test Pages:
1. Enter Diagnostic mode. (Turn the printer
off, press and hold Left ( ) and
Select ( ), turn the printer on, and then
release the buttons when the installed
memory and processor speed displays.)
2. Select PRINT TESTS, and press
Select ().
3. Select Prt Qual Pgs, and press
Select ().
Is only one color missing?
Replace the developer unit
for the missing color.
Go to step 3.
3
Replace the imaging unit. See “Imaging unit
(IU) removal” on page 4-35.
Does this fix the problem?
Problem resolved. Go to step 4.
4
Enter the Diagnostics Menu (turn the printer
off, press and hold and , turn the printer
on, and release the buttons when installed
memory and processor speed displays), and
run the appropriate cartridge drive motor test
for the missing color:
1. Select MISC TESTS in the Diag Menu, and
press Select ().
2. Select Motor Detect.
Remove Cartridge. Press Select appears.
Note: Do not press Select yet.
3. Remove all toner cartridges and the
imaging unit.
4. Close the front cover.
If you press Select before closing the front
cover, a message appears: Close Cover.
Press Select.
5. Press Select ().
Motor Detection In Progress… appears.
The motor detection process takes about
10 seconds, and stops automatically.
Detect Complete. Rebooting… appears,
and the printer performs a POR (Power On
Reset).
Did the motor run?
Go to step 5. Replace the Main drive gear
assembly. See “Main drive
gear assembly removal”
on page 4-45.
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