Brother MFC-T4500DW - Defective Images; Scanned-Image Problems; Troubleshooting from Image Defect

Confidential
2-84
4.8 Scanned-image Problems
4.8.1 Defective images
Fig. 2-12
4.8.2 Troubleshooting from image defect
■ Light
Light Scanning position failure Dark Completely blank
Horizontal streaks
White horizontal
streaks
Colored over the whole page
Entire image is
distorted or
deformed
Image is stretched All black
Shadows when
scanning by
document scanner
< User Check >
- Check if the contrast is set to "Light."
- Clean document cover glass or ADF glass.
- Clean the document pressure bar.
Step Cause Solution
1 White level correction data
failure
Carry out maintenance 55.
2 First side or second side CIS
unit defective
Replace the first side or second side CIS unit.
3 Main PCB defective Replace the main PCB.