Chapter 1010-4F-10-410.3.3 Sequence of Operation 0006-5390iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /1. Standby Mode, Sleep ModeIn standby mode or sleep mode, the heat discharge fan (front, rear; FM1/2) is at rest.2. PrintingWhile printing is under way, the fans are switched between full speed and half speed depending on whether the machine is in full speed mode or half speed modeand the reading of the environment sensor (HU1).- Double-Side PrintingT-10-4- Single-Sided PrintingT-10-5Note 1:While the machine is in continuous printing mode, the insertion of one or more double-sided prints will start the control used for double-sided printing.Note 2:The printing interval covers the interval up to when the fixing motor (M3) stops rotation.10.4 Power Supply System10.4.1 Power Supply10.4.1.1 Route of Power Inside the Printer Unit 0008-0541iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570NThe machine's DC power is controlled by the printer unit power supply PCB.The following shows the functions of the individual power supply PCBs used or accessories and the distribution of power:T-10-6Environment sensor (HU1) reading Full speed, half speed25 deg C or more Full speedLess than 25 deg C Half speedEnvironment sensor (HU1) reading Full speed, half speed30 deg C or ore Full speedLess hand 30 deg C Half speedName Description RemarksPrinter unit power supply PCB Generates DC power (24 V, 13 V); supplies DC power to thecontroller power supply PCB and cassette pedestal.Accessories power supply PCB Supplies power to the side paper deck, buffer path, and finisher.Main switch Turns on/off the power to the AC driver PCB.Door switch Turns on/off 24 VU1 to the DC controller PCB.Leakage breaker Cuts power in the event of an error.Environment heater switch PCB Turns on/off power to the cassette heater, printer unit heater, anddeck heater.OptionalHigh-voltage power supply PCB Generate various high voltage.AC driver PCB Supplies AC power to the printer unit power supply PCB,accessories power supply PCB, Supplies AC power to all-nightpower supply PCB; drives the fixing system.Controller power supply PCB Supplies DC power to the 3-way unit, fax board, controller, HVTand DC controller PCB; generates DC power (13V, 5V, 3.3V).Generates DC power (5V,3.3V).All-night power supply PCB Generates and supplies all-night power (3 VB).CPU24V or 13V24V 13VVoltageswitching circuitDC controller PCBFull-speedsignalHalf-speedsignalClock signalFan
