Other Key Components - Konica Minolta Bizhub 4700P Service Manual

bizhub 4700P/bizhub 4000P Service Manual
the timing the patch image passes the sensor. Therefore, observing changes of intervals at which
pulses are output leads to toner density detection.
Pass through sensor (option tray)
Detects when the media from the option tray passes. This will trigger the pick roller to pick the next
media.
Capacitive Toner Level Sensor (CTLS)
Detects the amount of toner in the imaging unit. If the toner level is low, the cartridge auger motor is
triggered to add toner from the toner cartridge to the imaging unit.
Front door sensor
Is a safety switch that cuts off a 5 V DC supply from the controller board to the LSU to prevent the laser
from activating when the front door is opened.

12.5.2 Other key components

Cooling fan
Discharges air from the printer to prevent excessive temperature increase.
Power supply
The power supply has two main sections: the HVPS and LVPS. The HVPS card assembly generates
AC power and feeds it to the developer roll, the transfer roll assembly and the charge roll assembly.
The LVPS card assembly generates low voltages: 5 V DC for logic circuits, 5 V DC for laser diodes and
24 V DC for cooling fans.
Controller board
Controls the printing operation based on the communication with the RIP controller and optional
peripherals. It also controls the fuser, toner dispensing, sensor switch feedback, drive motors, clutches
and solenoids
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