Image Quality Fip; Notes On Image Quality Trouble Check; Basic Rule Of Image Quality Adjustment; Troubleshooting Table By Trouble Phenomena - Brother HL-4000CN Service Manual

11.

IMAGE QUALITY FIP

11.1

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) Print head cartridge
2) Transfer roll cartridge
3) Y toner cartridge
4) M toner cartridge
5) C toner cartridge
6) K toner cartridge
11.2

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.
30K print
25K print
6K print
6K print
6K print
8.5K print
V-74