Scanner Mechanism - Epson Stylus CX4100 Service Manual
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EPSON Stylus CX4100/CX4200/CX4700/CX4800/DX4200/DX4800/DX4850
2.3 Scanner Mechanism
The Scanner Mechanism of Stylus CX4700/CX4800/DX4800/DX4850/CX4100/
CX4200/DX4200 is constructed of a Scanner Carriage Unit, Scanner Motor, Scanner
HP Sensor, etc., in the same way as previous A4 size scanners.
2.3.1 Scanner Carriage Mechanism
2.3.1.1 Scanner Carriage Unit Overview
The Scanner Carriage Unit is constructed of a CIS Board (including linear CCD), Rod
Lens Array, LED (light source), etc.
CIS Board
This takes the light information read from the document by the Rod Lens Array
and converts it to digital information using the linear CCD.
Rod Lens Array
Many rod-shaped lenses are arranged in parallel, and the upright multiple images
of each lens is overlapped to form a single continuous image. Compared to a
regular lens, this has the special ability to reduce the distances between images.
It can project at 1 to 1 size for imaging a linear CCD with a width identical to an
A4 size document.
LED
The unit uses an LED for an exposure light source. Using an LED eliminates the
need for an inverter board, and power consumption is reduced.
OPERATING PRINCIPLES
Scanner HP Sensor
Scanner Motor
Rod Lens Array
CCD
Scanner Carriage Unit
Scanner Mechanism
Scanner Carriage Shaft
Scanner Carriage Unit
Timing Belt
Figure 2-13. Scanner Mechanism
LED
CIS Board
Figure 2-14. Scanning image
Revision A
76
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