Canon BJC 50 Service Manual - Page 138

Part 4: Technical Reference BJC-50 6.4 Scan Mode TABLE 4-7 LIST OF SCAN MODE Scanning Resolution (dpi) 360 300 200 200 180 90 360 360 360 180 180 90 Scanning Image Pixel Width Color Black & White Multi Value Multi Value Binary 48 dots 48 dots 128 dots 64 dots 64 dots 128 dots 64 dots 112 dots 128 dots 64 dots 128 dots 128 dots 64 dots 128 dots 128 dots 64 dots 128 dots 128 dots Carriage Speed 3.91 3.91 3.91 6.43 6.43 7.81 KHz KHz KHz KHz KHz KHz 6.5 Calibration The process of sampling and collecting data such as the printer's internal temperature, black standard data and white standard data is referred to as calibration. The scanner application retains the past 5 calibration data and saves them in a file. When a scanning operation is performed, a value from the compiled temperature data that is within ±5°C of the printer's internal temperature at the time is downloaded to the scanner controller. The scanner application requests calibration when there is no compiled data within ±5°C. 4-50