Canon CXDI-31, Service Manual

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4 CXDI-31 E/O Box
2. Functions
2.1 E/O Mother Board
(1) The Board performs the multiplex processing on the image data transmitted from the Imaging
Unit through the E/O Box 31 IF Board. It then converts the image data to optical signals by
using the optical transmission module and sends them to the Multi-Box OE Board.
(2) Data conversion: Parallel communication data Æ Serial communication data
The Board converts the parallel communication data received from the Imaging Unit through
the E/O Box 31 IF Board to the serial data to allow the serial communication with the Isolation
Board of the Multi-Box.
(3) Data conversion: Serial communication data Æ Parallel communication data
The Board converts the serial communication data received from the Isolation Board of the
Multi-Box to the parallel data to allow the communication with the Imaging Unit through the
E/O Box 31 IF.
(4) Imaging unit connection check
The Board converts the connection check signal for the Imaging Unit received from the
Isolation Board of the Multi-Box to the signals recognized by the E/O Box 31 IF. It also
transmits the Imaging Unit data received from the E/O Box 31 IF to the Isolation Board.
(5) Driving power for the 31 E/O Box
The power for the Sensor for the CXDI-11, or the same for the CXDI-22 can drive the 31 E/O
Box. See [Table.1] for selection of the driving power.
Settings for SW3 Driving power Power supply
11 POW side (silk mark on the substrate) Not used Not used
22 POW side (silk mark on the substrate)
Power supply for CXDI-22
Sensor
14V(*1)
[Table 1]
*1) The 14V power for the CXDI-22 Sensor is regulated to the 5V power.
(6) Control Line Check mode
Each control line is checked if it properly works according to the commands by the Capture
Board.
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