Service manual

V-77
12. IMAGE QUALITY FIP
12.1 Notes on Image Quality Trouble Check
Image quality troubles are checked and processed according to the troubleshooting table
by trouble phenomena. In case of a continuous or abnormal image defect, check the
installation environment at the customer, the document, and the consumables.
1. Installation environment
• Prepare a power supply of 100/120/220±10 VAC.
• Do not install the printer at a place of high temperature or humidity (near a water
tap, water heater, humidifier, heater, air conditioner, or fire) or at a very dusty
place.
• Do not install the printer where an ammonia gas is generated.
• Do not install the printer under direct sunlight.
• Install the printer at a well-ventilated place.
• Keep the printer horizontal.
2. Host check for an image quality trouble
• Check whether the trouble depends on the application.
1) Printing from another client
2) Printing from another application
3) Printing from another file
4) Changing the driver
5) Changing the application
6) Checking the client system
3. Consumables check
• Check the lives of the following consumables:
1) Drum cartridge 30K print
2) Transfer roll cartridge 25K print
3) Y toner cartridge 6K print
4) M toner cartridge 6K print
5) C toner cartridge 6K print
6) K toner cartridge 9K print
12.2 Basic Rule of Image Quality Adjustment
The basic rule of image quality adjustment is to clean each mechanical section.
Clean the ADC sensor ASSY, paper path, fuser, and transfer roll. Remarkable or quick
fouling of a mechanical section is often attributable to the installation environment. An
appropriate remedy is necessary.