Actions Yes No
Step 1
Check if the fuser screws are tightly fastened.
Are they tightly fastened?
Go to step 2. Tighten the screws.
Step 2
a Turn off the printer.
b Remove the rear door and cover.
c Disconnect the fuser cable connected to PCN5 of the power supply.
d Check for approximate correct resistance on the fuser cable:
• 220V fuser—43 ohms
• 110V fuser—10 ohms
• 100V fuser—8 ohms
Is the resistance equal to any of the above values?
Go to step 3. Replace the fuser. See
“Fuser removal” on
page 211.
Step 3
Check the following fuser components for wear or damage:
• Gears
• Exit rollers
• Belt fuser
Are they free of damage?
Replace the power
supply. See “Power
supply removal” on
page 191.
Replace the fuser. See
“Fuser removal” on
page 211.
Toner specks appear on prints
Actions Yes No
Step 1
Check the imaging unit for wear or damage.
Is it free of wear or damage?
Go to step 2. Replace the imaging
unit.
Step 2
Make sure the paper path is free of debris or toner contamination.
Does the problem remain?
Go to step 3. The problem is solved.
4514-420, -430
Diagnostic information
45
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