5-10 Phaser 6121MFP Service Manual
Print-Quality Troubleshooting
Light Print
The overall image density is too light.
Initial Actions
Perform the initial actions listed on page 5-5.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Scanner Unit, PL2.0.4
■ Imaging Unit, PL4.0.13
■ Transfer Roller, PL7.1.10
■ High Voltage Board, PL13.0.6
■ Laser Unit, PL4.0.2
■ Toner Cartridge (See consumables
parts list)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Print Test Pattern 3 (see
page 5-7).
Does the defect occur on
the printed output?
Go to step 4. The problem is
associated with the
scanner system.
Go to step 2.
2 Increase the copy
darkness level using the
control panel adjustment,
and then make another
copy.
Does the defect still
occur?
Go to step 3. Complete.
3 Reseat all connectors and
cables between the
Scanner Unit and the
Image Processor Board,
and then make another
copy.
Does the defect still
occur?
Replace the Scanner
Unit (page 8-31).
Complete.
Light or Undertone Print
Chrysanthemum x morifoliumChr
santhemum x morifolium
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