Id Sensor - Ricoh MP 305 Plus Field Service Manual

ID Sensor

The ID sensor is used to keep image density constant by monitoring the density of a standard sensor
pattern. Based on the ID sensor readings, the machine adjusts the development bias, drum potential and
LD power.
The ID sensor does not check each page or each job. The ID sensor check is done at the following times:
• When the machine is warming-up at startup.
• When recovering from sleep mode or energy saving mode, and ID sensor control temperature
(measured by the internal temperature sensor) is below a certain value. (Initial setting: 30°C)
Cleaning the Charge Roller
Dirt can easily adhere to the charge roller [B] because the roller is always in contact with the drum with
the pressure spring. Therefore, the charge roller cleaning roller [A] is always in contact with the charge
roller [B] for cleaning.
Drum Cleaning
The cleaning blade [A] removes any toner remaining on the drum after the image is transferred to the
paper. This model uses a counter blade system.
The cleaning blade scrapes off toner remaining on the drum. When toner builds up in the cleaning unit,
toner at the top of the pile is removed by the toner collection coil [B].
PCU
531