Canon i-SENSYS MF744Cdw
Test Print. How to use 1
Color chart (TYPE=2)
| Check item | Checking method | Assumed cause |
|---|---|---|
| Color | Check the color. | Cartridge error Soiling on the Color Displacement/Density Sensor ITB Unit error Reader error |
Rainbow chart (vertical scanning direction) (TYPE=4, TYPE=7)
| Check item | Checking method | Assumed cause |
|---|---|---|
| Color displacement | Output the PG after performing color displacement correction, and check the displacement for each color in the feed direction. | Soiling on the Color Displacement/Density Sensor Cartridge error ITB Unit error Main Drive Unit error |
Rainbow chart (horizontal scanning direction) (TYPE=5, TYPE=8)
| Check item | Checking method | Assumed cause |
|---|---|---|
| Color displacement | Output the PG after performing color displacement correction, and check the displacement for each color in the shaft direction. | Soiling on the Color Displacement/Density Sensor Cartridge error ITB Unit error Laser Scanner Unit error Main Controller PCB error |
Color grid (TYPE=6, TYPE=9)
| Check item | Checking method | Assumed cause |
|---|---|---|
| Color displacement | Check that there is no displacement between the lines of the respective colors. | Laser Scanner Unit error ITB Unit error Soiling on the Registration Sensor Secondary Transfer Roller error Main Drive Unit (drum rotation) error |
| Right angle accuracy and linearity | Check that there is nothing wrong with the right angle accuracy and linearity between the lines of the respective colors. | Laser Scanner Unit error Registration Roller error Secondary Transfer Roller error |
16 gradations (TYPE=10)
| Check item | Checking method | Assumed cause |
|---|---|---|
| Gradation | Check that the 16 density gradations are recognizable. | Photosensitive Drum error Laser Scanner Unit error |
| Fogging | Check whether fogging appears only in the blank area. | Photosensitive Drum error Laser Scanner Unit error |
| White line | Check the entire image for any white line. | Photosensitive Drum error Laser Scanner Unit error |
| Uneven density between the front and rear | Check for any uneven density between the rear and front sides. | Photosensitive Drum error Laser Scanner Unit error Soiling on the laser light path |
17 gradations of Y/M/C/Bk/R/G/B (TYPE=11)
| Check item | Checking method | Assumed cause |
|---|---|---|
| Gradation | Check that the 16 density gradations are recognizable. | Photosensitive Drum error Laser Scanner Unit error |
Halftone (TYPE=12)
NOTE:
Various settings can be configured in the following service mode.
• Output of each developing color:
TESTMODE > PRINT > SW-Y
TESTMODE > PRINT > SW-M
TESTMODE > PRINT > SW-C
TESTMODE > PRINT > SW-K
• Print density setting:
TESTMODE > PRINT > DENS-Y
TESTMODE > PRINT > DENS-M
TESTMODE > PRINT > DENS-C
TESTMODE > PRINT > DENS-K
| Check item | Checking method | Assumed cause |
|---|---|---|
| Transfer failure | Check the entire image for any transfer failure. | ITB error (scratches or soiling) Primary Transfer Pad error (scratches or soiling) Secondary Transfer Roller error (scratches or soiling) |
| Black line (colored line) | Check the entire image for any black line. | Scratches on the Photosensitive Drum |
| White line | Check the entire image for any white line. | ITB Unit error Secondary Transfer Roller error Soiling on the laser light path |
| Uneven density at regular intervals | Check the entire image for any uneven density at regular intervals. | Photosensitive Drum error |
| Uneven density | Check the entire image for any uneven density. | Soiling on the Dustproof Glas Deterioration of the ITB |