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3.
Rear Display USB Connection
This LED indicates that the USB hub on the
control board is connected to a USB host (in this
case, the rear display).
Normal Operation
•
The LED is on solid when a rear display is connected (power and USB).
Faulty Operation Symptoms
•
The icon in the top left-hand corner of the rear display screen is red.
•
The rear display is not responding.
•
On boot-up, the values in Manual speed or Regulated SPI are zero on the rear display.
Corrective Measures
•
Be sure the rear USB cable is connected
between the rear display and the top USB
connection on the rear panel.
•
Make sure the internal USB cable from
the rear panel is connected to the J6 USB
connector on the main control board.
4.
Rear Display RS232 Connection
Communication between the USB hub and
the processor runs through a USB to Serial
converter. These two LEDs indicate the
transmitted and received data on that serial
link.
Normal Operation
•
When the rear display has booted up and established communication with the main control
board, these LEDs will flash rapidly.