Canon CXDI-50G, Service Manual

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2. Installation Manual
5.1.2 Connecting to the Power Box
(1) Removing the cover
Remove the 5 screws from the back of the power box and the 2 screws on each side at the
bottom of the power box.
Also remove screws on the
far side
(2) Check the jumper pin settings on the PCB-50XRAY board in the power box. The power
supplies for 7m and 3m are not compatible due to having different output voltages. This
short pin is for determining the power, not for changing the voltage.
50G power unit setting
50G Power
（ 7m ） : Short between JP1 6-8p
50G power （ 3m ） : Short between JP1 7-8p
This setting is done when shipping
With changing the jumper pin settings, the signal sent to PLD (IC1) of the PCB-50XRAY
board has either state High or Low. By using this state, the PBIF50XRAY PLD code which
written in the PLD can distinguish whether the power supply is for 3m or 7m.
When the echo signal for checking the cable connection and determining if the power box
is 3m or 7m is sent from PCB-50Di board on the Imaging unit, the PBIF50XRAY PLD
code echoes back with a noninverted if the signal is for 3m and an inverted signal if the
signal is for 7m.
The Imaging unit determines the cable length based on the dip switch setting (SW1-7:
OFF) on the PCB-50Di board. If cable connector P4 #1-#2 is open, cable length is 7m. If
#1-#2 is connected, cable length is 3m. Based on the signal echoed back from the PCB-
50XRAY board and the dip switch setting, the imaging unit checks if the communication
system is working properly, while also checking if the power box information (3m/7m) and
cable length information are consistent.
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