Sensor Unit; Sensor Data File; Sensor Cable; Pwb-Di Board - Canon CXDI-40G COMPACT Service Manual

1.4 Sensor Unit

The sensor unit consists mainly of the basic sensor unit (LANMIT sensor, AD board, Di
board, cover, etc.), the sensor cable and the ready lamp unit.
After the X-ray images are converted into visible light using a fluorescent screen, they are
electrically stored in the sensor.
The electrical signals (images) stored in the sensor are read out, A/D converted, and stored
in the frame memory for the time being.
At the same time as the images are stored, they are reduced in size, and transferred
through the power box to the control PC via the general-purpose interface (Ethernet
100Base-TX).
Upon completion of the reduced-size image capture, the images in the frame memory are
now transferred in the same way.

1.4.1 Sensor Data File

The "sensor data" refers to the sensitivity, deficiencies and other data unique to the sensor
unit.
The sensor data is recorded inside the sensor unit (PWB-Di), and automatically
downloaded to the control PC as sensor data files by the control software.

1.4.2 Sensor Cable

The cable is used to connect the basic sensor unit with the power box.
•Communication line connected via the power box between the basic sensor unit and
control PC
•Power line for supplying power from the power box to the basic sensor unit
•Communication line (7 meters long) between the basic sensor unit and power box

1.4.3 PWB-Di Board

This board has the functions described below.
(1) LANMIT-40E drive
The LANMIT-40E (henceforth "LANMIT") is driven through the PCB-40EAD and PCB-
D-EP boards connected to this board.
(2) X-ray exposure synchronization
Communication with the X-ray generator is conducted in synchronization with the
LANMIT operation and X-ray exposure in synchronization with the image capture
operation is provided.
(3) Image data capture, transfer and command communication
The data (14 bits/pixel, 2688 x 2688 pixels) resulting from the A/D conversion of the
LANMIT output signals performed on the PCB-40EAD boards are received, and stored in
the SDRAM.
The image data captured via Ethernet (100Base-TX) is output to the control PC. The
commands specifying the operation mode of the PWB board or LANMIT are also
communicated through Ethernet.
3. Function
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