Page: 65Service Manual - OKIPAGE20Chapter 4 AdjustmentThe engine maintenance mode is activated when the power is turned ON while pressing to the FormFeed key and Enter key.This mode adopts the menu for function selection.The method for exit from this mode depends on the setting.The engine maintenance mode is provided with the following functions:(1) Head type setting select LED Head typeSets the select LED head type.(2) Head drive time settingSets the drive time of the LED head.(3) Head drive time setting at auto head typeThis function sets head drive time, when " HEADTYPE= AUTO" is selected.(4) Head strobe time at 600 x 1200 dpiThis function sets head strobe time at 600 x 1200 dpi.(5) Printing start position settingSets the printing start position.(6) Drum count total displayDisplays on the LCD the total number of drum revolutions in the unit counted at the engine.(7) Drum count displayDisplays on the LCD the total number of EP drum revolutions counted at the engine.(8) Setting of standard tray paper feed lengthThis function sets the paper feed length of standard tray paper.(9) Setting of front feeder paper feed lengthThis function sets the paper feed length of the front feeder.(10) Setting of High Capacity Second Paper Feeder paper feed lengthThis function sets the paper feed length of the High Capacity Second Paper Feeder.