
9. TROUBLESHOOTING
B--63005EN/02
592
This situation can occur only with the stand--alone type.
If a break is detected in the optical cable (HSSB) that connects the LCD
unit to the main CPU board, the display on the LCD unit flashes.
The same situation occurs if the main CPU board is turned off while the
power is on.
The display on the LCD unit flashes if the main CPU board is turned off,
with the LCD kept on, while the power is on.
Check that the optical cable is free from excessive force and that it is not
excessively bent.
If no problems are found with the connection of the cable, replace the
optical cable.
Replace the display control card installed on the main CPU board.
Replace the LCD unit or the control printed circuit board located at the
rear of the LCD unit
CPU card
Display control
card
Axis control
card
Main CPU board
9.8
THE DISPLAY ON
THE LCD UNIT
FLASHES
Causes and actions
D Power supply of the
main CPU board
D Break of the optical
cable
D Display control card
D LCD unit
D Installation position of
the display control card