Action Yes No
Step 1
a Clear the paper path of debris and contamination.
b Remove, and then insert the imaging unit and toner cartridge.
Note: Shake the toner cartridge and imaging unit before
inserting them.
c Perform a POR.
d Enter the Diagnostics menu, and then select Advanced Print
Quality Samples.
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
a Make sure that the imaging unit is properly installed and free
of damage.
b Make sure that the smart chip contacts are free of corrosion
and contamination.
c Make sure that the photoconductor roller surface is free of
damage.
d Make sure that the imaging unit HVPS contacts are free of
corrosion and contamination.
e Enter the Diagnostics menu, and then select Advanced Print
Quality Samples.
Does the problem remain?
Go to step 3. The problem is
solved.
Step 3
Replace the imaging unit.
Does the problem remain?
Go to step 4. The problem is
solved.
Step 4
a Check the imaging unit drive lever for proper installation and
damage.
b Open the right cover, and then check the lever assembly for
proper installation and damage.
Is the imaging unit drive lever properly installed and free of
damage?
Go to step 6. Go to step 5.
Step 5
a Open the front door.
b Remove the imaging unit.
c Remove the toner cartridge from the imaging unit.
d Slightly close the front door, and then check if the lever actuates
the imaging unit drive gear.
Did the imaging unit drive gear actuate?
The problem is
solved.
Contact the next
level of support.
3400-48x
Diagnostics and troubleshooting
80