Brother International MFC 8890DW Service Manual - Page 502

Selector No. Function Setting and Specifications No. 1 2 3 4 0 0 0 0: 1% (Default) 0 0 0 1: 0.5% 0 0 1 0: 3% 1 Change rate of the CCD 0 0 1 1: 5% I scanning light intensity to judge to be stable in the long time 0 1 0 0: 10% 4 mode 0 1 0 1: 15% 0 1 1 0: 20% 1 1 1 1: 100% * * (Scans immediately after the light source ON) No. 5 6 7 8 0 0 0 0: 5% (Default) 0 0 0 1: 1% 0 0 1 0: 3% 5 Change rate of the CCD 0 0 1 1: 10% I scanning light intensity to judge to be stable in the short time 0 1 0 0: 15% 8 mode 0 1 0 1: 20% 0 1 1 0: 30% 1 1 1 1: 100% * * (Scans immediately after the light source ON) • Selectors 1 through 8: Change rate of the CCD scanning light intensity to judge to be stable. The light intensity of the CCD unit is changed widely immediately after the light source is on, that influences scanning density. Therefore, the first scanning after the light source is off and on is started after the change rate of the CCD light intensity is stabilized in the definite range. These selectors set the change rate to start the scanning operation above. If you want to start scanning immediately even if the image quality is not good, set the rate to high. Long / short time mode: The selectors are divided between the long and short time modes depending on the scanning resolution and black and white or color mode. The long time mode is selected in color scanning at 600dpi or more, or in black and white scanning at 1200dpi. The short time mode is selected in other scanning conditions than the above. App. 1-68 Confidential