Actions Yes No
Step 2
a Make sure that the toner cartridge supply is not low.
b Check the photoconductor for contamination or damage, and replace
if necessary.
Does the problem remain?
Go to step 3. The problem is solved.
Step 3
Enter the Diagnostics menu, and then navigate to:
PRINTER SETUP > Printed Page Count
Does the page count reach 300K or 600K?
Go to step 4. Go to step 5.
Step 4
Check the following for damage:
• Developer unit
• Transfer belt
• Transfer roller
Replace the parts if necessary. See
“Transfer roller removal” on page
284.
Does the problem remain?
Go to step 5. The problem is solved.
Step 5
a Make sure that the erase LED is properly installed.
b Check the LED for damage, and replace if necessary.
Does the problem remain?
Go to step 6. The problem is solved.
Step 6
CAUTION—SHOCK HAZARD: Do not perform this step if the printer
is on.
a Make sure that the following cables are properly connected:
• High voltage charge cable
• High voltage transfer cable
• High voltage toner charge cable
b Make sure that the high voltage charge and developer contacts are
secure.
c Check the high voltage board cables and contacts for damage, and
replace if necessary.
Does the problem remain?
Go to step 7. The problem is solved.
7421
Diagnostic information
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