41356901TH Rev.2 74 /4.1.3 Engine Maintenance ModeNote: This mode is used only by maintenance personnel, and it should not be released to the endusers.(1) To enter into the engine maintenance mode, turn the power on while holding ENTER and FORMFEED keys down.(2) Functions of this mode are selected by the menu.(3) The way to exit out of this mode varies depending on the settings.(4) There are following engine maintenance modes:a) Head drive time settingSets the drive time of the LED head.b) 600 x 1200 DPI strobetime relative value.c) Installed LED head indentification.d) Printing start position settingSets the starting position of printing.e) Drum count total displayThe total image drum rotation count of the printer, as counted by the engine section, is displayedon the LCD.f) Drum count displayThe total image drum rotation count, as counted by the engine section, is displayed on the LCD.g) Standard tray paper feeding quantity settingSets the amount of paper to be fed from the standard tray.h) High Capacity Second Paper Feeder paper feeding quantity settingSets the amount of paper to be fed from High Capacity Second Paper Feeder.i) High Capacity Second Paper Feeder downloading table selectionSelects the downloading table of High Capacity Second Paper Feeder.j) Power Envelope Feeder paper feeding quantity settingSets the amount of paper to be fed from Power Envelope Feeder.k) Power Envelope Feeder downloading table selectionSelects the downloading table of Power Envelope Feeder.l) Engine Testm) Engine ResetAll EEPROM areas used by the engine section are reset to factory default values.(See Table 4-1)After reset, the printer returns to normal operating mode.Note: "Printing start position setting" is for shipping. Do not change its default value.Detailed descriptions of these functions are porvided in Appendix E, DIAGNOSTICS TEST.