Chapter 22-492.4.4 Motor Driver2.4.4.1 Roll feed unit PCB components 0013-4323F-2-48a) Driver IC (IC1)Roll motor drive functionThis function controls the roll motor based on the control signals from the main controller.Sensor relay functionThis function relays the input signals from the roll cam sensor and roll media sensor to the main controller PCB.2.4.5 Maintenance Cartridge Relay PCB2.4.5.1 Maintenance cartridge relay PCB components 0013-5143F-2-49a) EEPROM (IC1)The 128-KB EEPROM stores all information written to the EEPROM on the main controller PCB.2.4.6 Power Supply2.4.6.1 Power supply block diagram 0013-4333F-2-50The power supply converts AC voltages ranging from 100 V to 240 V from the AC inlet to DC voltages for driving the ICs, motor, and others.The voltage generator circuits include the +26 V generation circuit for driving motors, fans, and sensors and a +21.5 V generator circuit for driving sensors, heads,logic circuits, and others.When the power is turned off, +26 V and +21.5 V are reduced to about 12 V and 9 V respectively (power save mode).Power ON/OFF operation is controlled by the main controller PCB.IC 1IC 1Operation panelTransformerDC power supplycontrol circuit+21.5Vgeneration circuit+26Vgeneration circuitPOWER ONRectifying circuitNoize filter circuitAC inlet100V to 240VPower supplyMain controller PCB+5V/+3.3Vgeneration circuit
