| Defective area |
Step |
Check items |
Prescription |
| Density reproduction |
1 |
Check the reproduction of the image density. |
Adjust the density. |
| Parameter adjustment value |
2 |
Check the image processing param- eters. |
Check the adjustment value for sharpness. |
| Printer section |
3 |
Check test print image (04-113). |
When defects occur, perform the cor- responding troubleshooting proce- dure. |
| 4 |
Check the image processing param- eters. |
Check the encircled areas A and B in the image, and change the sharp- ness intensity in the sharpness adjustment mode. |
| Defective area |
Step |
Check items |
Prescription |
| Density |
1 |
Is the density too high? |
Adjust the density. |
| Fuser unit |
2 |
Is the pressure of the fuser roller nor- mal? |
Check the pressure releasing parts and pressurization mechanism. |
| 3 |
Is the thermistor in contact with the fuser roller? |
Contact the thermistor with the fuser roller. |
| 4 |
Is there a scratch on the fuser roller surface? |
Replace the fuser roller. |
| 5 |
Has the fuser roller reached its PM life? |
Replace the fuser roller. |
| 6 |
Is the setting temperature of the fuser roller normal? |
Check the adjustment values of fuser roller temperature?
08-407, 410, 411, 450, 515, 516 |
| Paper |
7 |
Has the appropriate paper type been selected? |
Select a proper mode. |
| 8 |
Is the setting temperature of the fuser roller in each paper type normal? |
Check the setting and correct it. 08-412, 413, 437, 438, 451, 452,
453, 518, 520, 521 |
| 9 |
Using the recommended paper? |
Use the recommended paper. |
| Developer material |
10 |
Using the specified developer mate- rial? |
Use the specified developer material and toner. |
| Scanner |
11 |
Are the original glass (especially the position of shading correction plate), mirror and lens dirty? |
Clean them. |