Action Yes No
Step 2
Replace the top cover. See
“Top cover removal” on page 248.
Does the problem remain?
Go to step 3. The problem is
solved.
Step 3
a Reseat all the cables on the controller board.
b Check if the controller board LED lights up.
c Check the controller board for proper installation and damage.
Is the controller board properly installed and free of damage?
Contact the next
level of support.
Go to step 4.
Step 4
Replace the controller board. See
“Controller board removal” on
page 228.
Does the problem remain?
Contact the next
level of support.
The problem is
solved.
Short paper service check
Action Yes No
Step 1
a Make sure that the tray insert is properly inserted.
b Make sure that the paper type and size settings match the
paper type and size set on the tray.
c Make sure that the duplex unit is properly inserted.
d Make sure that the paper size setting in the duplex unit matches
the printer setting.
e Make sure that the front and rear doors are fully closed.
f Make sure that the output bin is free from obstructions.
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
a Remove the imaging unit and toner cartridge, and then make
sure that the paper path is free of jams and obstructions.
b Clear all rollers of dirt and contamination.
Does the problem remain?
Go to step 3. The problem is
solved.
Step 3
a Perform a POR.
b Enter the Diagnostics menu, and then navigate to:
Input tray quick print > Tray 1 > Single
Does the problem remain?
Go to step 4. The problem is
solved.
3400-48x
Diagnostics and troubleshooting
138
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