Action Yes No
Step 10
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 11.
Step 11
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.
Black imaging unit or photoconductor smart chip or sensor problem service check
Action Yes No
Step 1
a Open the front door.
b Reseat the imaging unit and toner cartridge.
c Close the front door.
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
a Shake the toner cartridge.
b Clean the toner cartridge smart chip contacts, and then check
the contacts for damage.
c Clean the toner cartridge spring contacts, and then check the
contacts for damage.
d Perform a print test.
Does the problem remain?
Go to step 3. The problem is
solved.
Step 3
Replace the toner cartridge.
Does the problem remain?
Go to step 4. The problem is
solved.
Step 4
a Shake the imaging unit.
b Clean the imaging unit smart chip contacts, and then check the
contacts for damage.
c Clean the imaging unit spring contacts, and then check the
contacts for damage.
d Perform a print test.
Does the problem remain?
Go to step 5. The problem is
solved.
3400-48x
Diagnostics and troubleshooting
123
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