CHAPTER 6 TROUBLESHOOTING
7.2Troubleshooting Image Defect
Several types of the image defects can be cleared by end users. For those defects, instruct the user to check the ‘User Check’ items described in each table. Even if the same image defect appears, the following procedures should be followed in the event of specific image defects.
See also Subsection 7.3 for information about the location of the grounding contacts.
!CAUTION:
When using the printer for a special job, such as printing of name cards, print quality cannot be guaranteed.
Light
User Check
(1)Check the printer’s environment. Conditions such as humidity, high temperatures, etc. may cause this situation to occur.
(2)If the whole page is light, toner save mode may be on. Disable toner save mode within Printer Properties tab of the driver.
(3)Try installing a new toner cartridge or drum unit.
Possible cause | Step | Check | Result | Remedy | Ground | |
contacts | ||||||
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Toner sensing | 1 | Can printing be started with the | Yes | Check if the toner |
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failure |
| drum unit and toner cartridge |
| sensor is dirty and |
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(printer side) |
| removed? |
| check the toner |
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| sensor connection. |
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Toner sensing | 2 | Is the problem solved when 4 | Yes | The wiper of the toner |
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failure |
| or 5 pages are printed after the |
| cartridge is defective. |
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(toner cartridge |
| toner cartridge is replaced with |
| Replace the toner |
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side) |
| a full one? |
| cartridge. |
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Drum | 3 | Are all the contacts between | No | Clean contact | ➀, ➃, | |
connection |
| the drum unit and printer body |
| electrodes both on the | ||
failure |
| connected correctly? |
| drum unit and in the | ➄, ➅ | |
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| printer body. |
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4 | Is the harness connection | Yes | Replace the high- |
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power supply |
| between the |
| voltage power supply |
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PCB failure |
| power supply PCB and the |
| PCB. |
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| engine PCB correct? |
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Engine PCB / | 5 | Is the harness connection | Yes | Replace the engine |
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Main PCB failure |
| between the engine PCB and |
| PCB or the main PCB. |
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| the main PCB correct? |
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Dirt on the | 6 | Is there any dirt on the scanner | Yes | Wipe it off with a soft |
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scanner window |
| window? |
| clean paper. |
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Laser unit failure | 7 | Is the problem solved after | Yes | Replace the laser unit. |
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| replacing the laser unit? |
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