Brother International MFC 8890DW Service Manual - Page 487

• Selector 7: Standby position of the CCD unit This selector determines whether the standby position of the CCD unit should be the home position or the location of the white-level reference film (attached to the inside of the scanner top cover). If the location of the reference film is selected, the CCD unit will not return to the home position so as to shorten the travel time, decreasing the preparation time for copying. • Selector 8: Line polarity reverse detection function Line polarity will be reversed if the phone is hung up at the other end of the line. If this selector is set to "1," the machine will detect the reverse polarity during an answering machine operation and thereby determine that the phone has been hung up. Selector No. Function Setting and Specifications No. 1 2 1 Monitoring the PC ON/OFF 0 0: Disable 0 1: Monitor SELECT IN 2 state 1 0: Monitor STROBE 1 1: Monitor both SELECT IN and STROBE 3 Parallel port output pins kept at high level (Not used.) 0: Enable 1: Disable 4 Previous filtering parameters for white level compensation 0: Enable 1: Disable 5 I Not used. 8 Note: • Selector 4 is not applicable to models equipped with flat-bed scanners. • Selectors 1 and 2: Monitoring the PC ON/OFF state For the related functions, refer to WSW36, selectors 2 and 3. • Selector 4: Previous filtering parameters for white level compensation At the start of scanning operation, the machine usually initializes white and black level data stored in the EEPROM by scanning the while-level reference film attached to the inside of the scanner top cover. After long use of the machine, however, the film may be contaminated with dust or dirt. Accordingly, incorrect white level data will be set up so that white vertical streaks will be brought on the scanning result. Setting this selector to "0" (Enabled) will apply previously saved white level data instead of new incorrect compensation. App. 1-53 Confidential