Epson GT-9000 Service Manual page 39

Transmission Section
This section receives the signal charge from the photosensitive section and transfers it to the output
The transmission section contains two capacitors for each photodiode in the
section.
photosensitive section.
There is only one output section, which means that signal charge for each pixel must be sent
separately to the output section. The operation is illustrated in the diagram and explained below.
Figure 2-5. Operations of the
Transmission Section
Output Section
The output section receives signal charges from the transmission section and sends them out of the
unit (i.e., to the main board). The section must receive a reset signal from the main board after
outputting the signal for each pixel.
Rev. A
The diagram at left is a simple illustration
of the transmission
transmission pulses. The photoelectrically
converted signal charges are stored in the
Section
n
When transmission pulse @2 goes ON,
signal charges move to the capacitor at their
right.
right-most capacitor is transmitted to the
output section and then to the main board.
When transmission pulse 4)2 goes OFF, the
condition of the section becomes stable.
When transmission pulse @ goes ON,
charges again move to the capaator at their
right.
When transmission pulse @ goes OFF, the
condition of the section again becomes
stable.
operations, signal charges for all pixels are
transmitted to the output section.
section. @l and @2 are
The charge that exists in the
By continual repetition of these