Chapter 99-3When the CPU on the engine controller outputs a fan half speed signal (FAN_HALF), the fan drive voltage switching circuit supplies a +16 V fan drive voltage toturn the heat exhaust fan at the half speed.Fan Control SequenceF-9-6E805-0000 (Main body fan error)When the cooling fan of the main body starts, the fan lock detection signal (FAN_LOCK) has been held at the "H" level for longer than the prescribed time.9.3 Power Supply System9.3.1 Power Supply9.3.1.1 Outline 0017-5483iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iWhen the main power switch (SW1) is turned on, AC power is supplied to the low-voltage power supply circuit in the power supply PCB.The low-voltage power supply circuit supplies +3.3 V, +5 V, and +24 V to operate the machine.+24 V is supplied to the motors, fan, electromagnetic clutch, solenoid, etc. +5 V and +3.3 V are supplied to the sensor, etc.There are two types of +24 V voltages: +24 V which is normaly supplied from the low voltage power supply and +24 VR which is cut off when the front cover orthe left door is opened. The +24 VR also plays the role of a door open detection signal (DOPEN). This signal allows the CPU to detect that the front cover or theleft door has opened.T-9-1Part Name FunctionPower supply PCB Generates DC power from AC power.Option power supply PCB (option) Generates DC power from AC power for the options.Main power switch (SW1) Supplies AC power to the power supply PCB.Front cover switch (SW2) Detects opening/closing of the front cover and cuts off +24 VR.Left door switch (SW3) Detects opening/closing of the left door and cuts off +24 VR.INTR STBY WMUPR: Half speed (+16V): Full speed (+24V)PRINT PRINT LSTR30secSTBYHeat Discharge Fan(FM1)Registration sensor(SR209)Fixing Drive Motor(M201)Power switch ON/Going out of sleep mode Copy start key ON Power switch OFF/Going into sleep mode
