Epson PhotoPC 800 Service Manual page 36

EPSON PhotoPC 800
CCD block diagram and terminals are shown below. Ye is yellow detection cell,
Mg is Magenta detection cell, CY is Cyan detetion cell and G is green detection
cell.
20 19 15 16
Horizontal Register
1 5 2
Note)
Figure 2-5. CCD Block Diagram
Operating Principle
14 12 13 11
Note
3 10
4 8
Photosensor
Operating principles of the Circuit Boards
Table 2-2. CCD Pin Description
Terminal Terminal
Terminal
symbol function
Circuit power
1 0D
supply
2,19 GND GND
3 0FD Board Clock
Protection
4 PW
transistor bias
5 RS Rest gate clock
Horizontal register
8 H1
transfer clock
Horizontal register
10 H2
transfer clock
Vertical register
11 V4
transfer clock
Vertical register
12, 13 V3A, V3B
transfer clock
Vertical register
14 V2
transfer clock
Vertical register
15, 16 V1A, V1B
transfer clock
20 OS Signal output
NOTE: ---- When sensor read-out
Revision A
Waveform Voltage
DC 13V
GND 0V
Approx. 6.9V
(Different
DC
from every
CCD)
DC -7V
7V, 13V
0V, 5V
0V, 5V
-7V, 0V
-7V, 0V, 13V
-7V, 0V
-7V, 0V, 13V
Approx.6.5V
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