28 Service manual
3. Circuit Boards - L900, CCD display adapter CRANEX
®
Novus e
L900 - Field replaceable parts
None
L900 - Description
L900 is a display adapter/interface board that controls
the display (touch screen interface). L900 reads touch
screen data and sends it to L1200 CPU board via the
SPI interface. L1200 CPU board drives the display data
throught the L900 board.
L900 board produces supply voltages +3.3V for the
display and +15.8V for the display backlight.
L900 - Indicator LEDs
LED Colour Indicates
H1 green 3.3V OK
H2 green +15.8V OK
H3 green +5V OK
L900 - Test Points
None
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