Dell 3010CN Service Manual page 563

• Surface of Drum is made of a photoconductor (insulator where not exposed to light,
conductor where exposed) and inside it is made of a conductor (aluminum cylinder).
• Drum Cleaner consists of Cleaning Blade and toner collection box, and scrapes off toner
remaining on the surface of drum using Cleaning Blade touching the drum. Toner collection
box has an actuator of Full Toner Sensor, and along with increase in amount of collected
toner, toner enters in the actuator, light is shielded for Sensor and full toner is detected.
• 1st BTR is a conductive roll, and positive voltage is applied to it from HVPS. 1st BTR
contacts the surface of belt, and positive voltage is applied to the rear side of belt.
• Crum XERO keeps unique data related to XERO CRU.
IBT Brush Motor
IBT Brush Motor drives the Belt Cleaner brush.
IBT Cleaner Retract Motor
IBT Cleaner Retract Motor drives the cam used to advance (to contact Belt) Belt Cleaner to
IBT Belt. When the cam rotates, Belt Cleaner contacts Belt.
Sensor IBT Retract
Sensor IBT Retract detects the position of cam for retraction of Belt Cleaner.
P/R Motor
P/R Motor drives the drum, and Motor and drum are connected by a coupling.
Sensor TR0
Sensor TR0 reads the silver seal attached on the belt surface outside of the toner image
forming zone and detects the position of Belt.
Sensor ADC
Sensor ADC reads the toner patch on the belt just before the 2nd transfer, and converts it to
voltage value. Voltage value is used to control concentration of toner.
Sensor Environment
Sensor Environment reads temperature/humidity inside the device, and converts the value
to voltage value. Voltage value is used to control concentration of toner.
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Chapter 6 Principle s of O peration