5 Verify on the Menu settings page if the following are set to their default values:
• Print resolution: 600 dpi
• Toner darkness: 8
6 Inspect the transfer roll for damage. Replace if damaged.
7 Inspect the toner cartridge and imaging unit for damage. Replace if damaged.
8 Print the Print quality pages to see if the problem remains. Use Tray 1 to test print quality problems.
9 Check to ensure the correct printer driver for the installed software is being used. An incorrect printer driver for
the installed software can cause problems. Incorrect characters could print, and the copy may not fit the page
correctly.
Print quality checks
Gray background or toner fog on prints
ABCDE
ABCDE
ABCDE
Leading edge
Trailing edge
Actions Yes No
Step 1
Check the cartridge plunger.
Is the cartridge plunger properly attached to the front door and is the
spring functioning properly?
Go to step 2. Replace the cartridge
plunger. See “Cartridge
plunger removal” on
page 170.
Step 2
Remove any contamination from the CTLS contacts. Perform a print test.
Does the problem remain?
Go to step 3. The problem is solved.
Step 3
Check the CTLS for damage.
Is it free of damage?
Go to step 4. Replace the printer.
Step 4
Check the transfer roll for surface contamination or excessive wear.
Is it free of contamination and wear?
Go to step 5. Replace the transfer
roll. See “Transfer roll
removal” on page
169.
Step 5
Check the transfer roll left contact spring for damage.
Is it free of damage?
Replace the power
supply. See “Power
supply removal” on
page 190.
Replace the printer.
4514-220, -230
Diagnostic information
49
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