Brother International 1920CN Service Manual - Page 117

3.2 Printout of Scanning Compensation Data n Function The machine prints out the white and black level data for scanning compensation. n Operating Procedure Do not start this function merely after powering on the machine but start it after carrying out a sequence of scanning operation. Unless the machine has carried out any scanning operation, this function cannot print out correct scanning compensation data. This is because at the start of scanning operation, the machine initializes white and black level data and takes in the scanning compensation reference data. (1) Press the 0 and 5 keys in this order in the initial stage of the maintenance mode. The "WHITE LEVEL 1" will appear on the LCD. (2) The machine prints out the scanning compensation data list containing the following: a) 2-value quantization white level data for green (2448 bytes) b) 2-value quantization white level data for blue (2448 bytes) c) 2-value quantization white level data for red (2448 bytes) d) 2-value quantization black level data for green (16 bytes) e) 2-value quantization black level data for blue (16 bytes) f) 2-value quantization black level data for red (16 bytes) g) A/D converter reference level for high value (3 bytes for green, blue, and red) h) A/D converter reference level for low value (3 bytes for green, blue, and red) i) Dark level offset data (3 bytes for green, blue, and red) j) Gain control data (3 bytes for green, blue, and red) (3) Upon completion of recording of the compensation data list, the machine returns to the initial stage of the maintenance mode. NOTE: If any data is abnormal, its code will be printed in inline style, as shown on the next page. V - 5