Brother MFC-L6900DW - Troubleshooting for Image Defects; Defect Examples; Troubleshooting According to Image Defect

2-118
Confidential
4.12 Troubleshooting for Image Defects
4.12.1 Defect examples
Fig. 2-18
4.12.2 Troubleshooting according to image defect
 Light
<User Check>
• Check that the contrast setting is not too light.
• Clean the scanner glass or first side/second side scanner glass
strip.
• Clean the document hold.
Step Cause Remedy
1
Incorrect white level correction data Execute "Acquire white level data (function
code: 55)".
2 First or second side CIS unit failure Replace the first or second side CIS unit.
3 Main PCB failure Replace the main PCB ASSY.
Light (2-118) Faulty registration (2-119) Dark (2-119) Completely
blank (2-120)
All black
(2-120)
Vertical streaks (2-120) White streaks
(2-121)
Partially shaded
(2-121)
Fully tinged (2-121)