Brother International HL-3400CN Service Manual - Page 202

HL-3400CN SERVICE MANUAL 4.6 Ozone Filter Replacement Criterion of Replacement Although the maintenance message indicating ozone filter replacement is not displayed on the LCD, the ozone filter should be replaced with a new one according to the periodical maintenance cycle set out in Table 6-4. This is to prevent ozone from being exhausted due to the deterioration of the ozone filter. A PRECAUTION Ozone filter should be replaced with a new filter every 12 months, otherwise it may cause an offensive smell. Necessary Tools and Replacement Materials No special tools and equipment are necessary for the replacement of the ozone filter. Work Procedure (1) Remove the ozone filter case provided at the rear of the side cover (R). (2) Remove the ozone filter from the ozone filter case. (3) Install a new ozone filter to the filter case. (4) Install the ozone filter case to the side cover (R). Ozone filter . 4 t, D4 04 4 4 0 4 `)4 04 0 0 0 4 i: 0 4 Up 4 0 CE:31 4 4 4 44444 4 44444 4 4 4 4 4 4 4 4 4 4 4 4 4 ° 0o' . 4 0 p ,, 0 p 0 0 0 b :% Filter case \ I ill IN ilk Fig. 6-28 6-31