Scanner

Light from the LED lamps [A] passes to the sensor on the SBU board through the following route:

1st Mirror [B] > 2nd Mirror > 3rd Mirror > Lens Block > Sensor

• LED Lamp
  LED lamps consume less power and provide better light at start-up so this machine employs LED lamps instead of xenon lamps. The power consumption is 30% of xenon lamps. To obtain the optimum light quantity, LED lamps are installed at an angle.
• Sensor
  The sensor collects the light that was reflected from the original and converts it to three color digital signals (R, G, B).
  The resolution of this CMOS sensor is 600dpi.
• Shading Adjustment
  A white plate for shading adjustment [A] is attached to the back of the scale [B]. Just after the power switch is turned on, the machine performs shading adjustment, during which the scanner unit moves to the white plate to emit LED light onto it in order to perform lamp modulation.
  For normal (book mode) scanning, the machine performs shading every page regardless of BW or color.
  For ADF scanning, the machine performs shading before the 1st sheet of the original is scanned regardless of BW or color, and then after that the machine performs shading for following sheets at regular intervals (one minute or more).