Brother International HL-1070 Service Manual - Page 66

If condensation has occurred, wipe the effected units or parts with a dry cloth. If the drum unit is unpacked soon after it is moved from a cold room to a warm room, condensation may occur inside the unit, which may cause incorrect images. Instruct the user to allow the unit to come to room temperature before unpacking it. This will take one or two hours. 1.2 Basic Procedure If a malfunction or incorrect print appears, make an initial check following the basic procedure below: (1) Check the error lamps following the inspection proc edure described later in this section. If no error lamps are lit, see Section 4 for troubleshooting information. (2) If any defective image output is found, follow the image defect fault descriptions in this section. 2. CONSUMABLE PARTS 2.1 Drum Unit The Drum lamp is on when the drum unit is nearly at the end of its life. Life expectancy: 20,000 pages at 20 pages per job 8,000 pages at 1 page per job Note: There are many factors that determine the actual drum life, such as temperature, humidity, type of paper and toner that you use, the number of pages per print job, etc.. 2.2 Toner Cartridge Toner low: The Data and Alarm lamps blink once every five seconds. Toner empty: The Data and Alarm lamps blink once every second. Life expectancy: 2,400 pages/a new toner cartridge (when printing A4- or letter-size paper at 5% print coverage) Note: Toner life expectancy will vary depending on the type of average print job printed. IV-2