Epson PhotoPC 850Z, Service Manual, Page: 41 / 127

EPSON PhotoPC 850Z Revision A
Operating Principles Operating Principles of Circuit Boards 41
2.2.1 CA1 Circuit Description
CA1 Board consists of the following ICs.
IC Configuration
IC903 (ICX224AK): CCD Imager
IC902 (74ACTO4MTC): H Driver
IC904 (CXD3400N): V Driver
The figure below shows the block diagram of the CA1 Board.
Figure 2-3. CA1 Circuit Block Diagram
2.2.1.1 IC903 (CCD)
Specification of the CCD is shown below.
Structure
Interline Type CCD Image Sensor
Optical Size: 1/2 inch format
Effective Pixels: 636 (H) x 1236 (V)
Total Pixels: 688 (H) x 1248 (V)
Optical Black Sensing:
Horizontal (H) Direction:
Front 4 pixels, Rear 48 pixels
Vertical (V) Direction: Front 10 pixels, Rear 2 pixels
Figure 2-4. Optical Black Layout
Number of Dummy Bit:
Horizontal:
28
Vertial: 1
Pin 1
2
10
48
4
H
V
Pin 11