Electrical - Minolta Magicolor 3100 Series Service Manual

5.11 Electrical

5.11.1 Major functions
M FAN
Discharges heat out of the printer to prevent too high temperature in the printer.
M HARNESS ASSY AC SW
Composed of the main switch and inlet. Controls supply of AC power from the power source to LVPS.
M LVPS STD
The LVP STD is provided with two types, 100/200V and 230V.
Supplies AC power from the power source to the FUSER ASSY 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 ASSY, in addition to the power circuit.
M PWBA HNB MCU
Controls printing operation based on the communication with the print controller and information from
the sensor/switch. Incorporates functions of HVPS.
Major functions are as follows:
• Communication with the printer controller.
• Receive of information from the sensors or switches.
• Control of ROS ASSY
Supplies high voltage to parts in the PHD ASSY (Imaging Unit) to perform charging, development,
primary transfer and secondary transfer of the print process to the following parts in the ASSY.
• RTC
• Refresher
• Developer
• IDT 1
• IDT2
• IDT 1 Cleaner
• IDT 2 Cleaner
M PWBA HNB DRV
Controls parts of motor and so on by the signal from the PWBA HNB MCU and sends information from
the sensors and switches to PWBA HNB MCU. The power from the LVPS STD is supplied to the PWBA
HNB MCU through this PWB. Also, the interlock switch is mounted on this PWB.
Major functions are as follows:
• Receive of information from the sensors or switches
• Control of Toner Motor in MAIN DRIVE ASSY, DEVE DRIVE ASSY, FUSER DRIVE ASSY,
MOTOR ASSY DUP, and HOLDER TDRU ASSY.
• Distributing low voltage DC power outputted from LVPS to each component
• Cutting off the 24VDC circuit by the interlock switch
M CONTROLLER BOARD
Receives data from high-order unit (host), prints and controls the whole printer.
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