Canon Color imageCLASS MF733Cdw
Troubleshooting. Item 1
Recurring faulty image
Overview
Foreign matters or lines on rollers along the paper feed path may cause faulty images in the vertical scanning direction.
Field Remedy
See the roller pitches listed in the tables below to clean and/or replace the corresponding parts.
CAUTION:
Since the Primary Charging Roller, Photosensitive Drum, and Developing Roller are located inside the cartridge and cannot be cleaned, replace the cartridge.
| Roller pitch | Parts |
|---|---|
| Approx. 44 mm | Registration Roller |
| Approx. 51 mm | Secondary Transfer Roller |
| Approx. 19 mm | Primary Charging Roller |
| Approx. 63 mm | Photosensitive Drum |
| Approx. 31 mm | Developing Roller |
| Approx. 57 mm | Fixing Roller |
| Approx. 57 mm | Pressure Firm |
Confirming nip width
Overview
Although the nip width of the Fixing Assembly cannot be adjusted with this machine, it can be checked. By checking the nip width when fixing failure occurs, it is possible to judge whether there is a problem with the Fixing Assembly.
Field Remedy
Check the nip width of the Fixing Assembly by the following procedure.
- Print a solid black image on an A4/LTR size paper using the cartridge of this machine and bring it to the customer site.
- Load the solid black printed paper with its printing side facing down in a cassette of the machine.
- Use an external device to print a solid white image.
- Open the Front Cover after approx. 25 seconds, leave it for 10 seconds or more, and then take out the printed paper.
- Measure the widths of the glossy part of the toner on the printed paper, and check that they are within the range as follows.
• Center (a): 6.0 to 7.0 mm
• Edge (b) and (c): 6.0 to 7.0 mm each
• Difference between left and right ( | b - c | ): 1.0 mm or less
