Dell 5110cn Color Laser Printer Service Manual - Page 561

Chapter 6 Principles of Operation 3.10 Electrical 3.10.1 Major functions - REAR FAN/LV FAN Discharges heat out of the printer to prevent too high temperature in the printer. - SWITCH SWITCH operates the main switches LVPS. - LOW VOLTAGE POWER SUPPLY (LVPS) The LVPS is provided with two types, 100/120V and 230V. Supplies AC power from the power source to the FUSER heater and generates and supplies stable low voltage DC power used for the logic circuit, etc. LVPS contains control circuit for the heater of the FUSER, in addition to the power circuit. - MACHINE CONTROL UNIT (MCU) Controls printing operation based on the communication with the print controller and information from the sensor/switch. Major functions are as follows: - Communication with the printer controller. - Receive of information from the sensors or switches. - Control of Toner Motor in MAIN DRIVE ASSEMBLY, DEVELOPER DRIVE ASSEMBLY, DRIVE ASSY FUSER, MOTOR ASSY DUP, and TONER DISPENSER ASSEMBLY. - Distributing low voltage DC power outputted from LVPS to each component - Control of PRINT HEAD - HIGH VOLTAGE POWER SUPPLY (HVPS) Supplies high voltage to parts in the DEVELOPER FRAME and IMAGING DRUM to perform charging, development, primary transfer and secondary transfer of the print process to the following parts in the IMAGING DRUM. - RTC - Refresher - Developer - IDT 1 - IDT2 - IDT 1 Cleaner - IDT 2 Cleaner - PWBA EEPROM STD Information unique to the printer is stored. - CONTROLLER CARD The CONTROLLER CARD connected to the MCU controls the entire system. 6 - 42