Canon imageRUNNER 2520 Series, Руководство по обслуживанию, Страница: 63 / 402

Image Formation System
Overview
■ Specifications of Image Formation System
tem Specifications/Mechanism/Method
Photosensi-
tive drum Material OPC high durability drum (E-drum)
Drum diameter φ30
Cleaning method Cleaning blade
Process speed 230mm/sec (at cassette pickup) 137mm/sec (at manual feeder pickup)
Primary
charging Charging method Primary charging roller
AC bias constant voltage control: approx. 550 to 2600Vp-p
DC bias constant voltage control: approx. -400 to -800V
DC bias switch control (variable according to environment sensor detection)
roller diameter φ14
Charging method Brush roller (φ10)
Developing Developing method Dry one-component jumping development
AC bias constant voltage control: approx. 800Vp-p
DC bias control: approx. -300 to -700V
DC bias switch control (variable according to density setting, environment sensor detection)
Developing cylinder diam-
eter φ20
Toner Magnetic negative toner
Toner level detection Toner detection by toner level sensor (inside sub hopper and developing unit)
Transfer Transfer method Transfer roller
DC constant current control: approx. 20 µA
Cleaning bias control: -2700V (DC constant voltage control)
DC current level control (variable according to environment sensor detection, paper type,
paper width, source of paper)
Roller diameter Φ16
Charging method Cleaning bias application
Separation Separation method Static separation (Static eliminator) + Curvature separation DC constant voltage control:
-2800V (high bias), -2300 (low bias)
Waste toner Collected into waste toner box
Waste toner box capacity: approx. 750g
■ Major Components of Image Formation System
The major components of image formation system are described below.
2. Technical Explanation
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