
7. TROUBLESHOOTING
B–63445EN/01
150
Check whether it is a trouble of display or a trouble of the system.
Check the STATUS LED on the controller shows the following state.
EW (green) ON
WD (red) OFF
S0.SI ON or OFF
If the status shows the above state, the system is normal.
Therefore, display system may be faulty.
If the status shows other state, a hardware other than the display system
may be troublesome.
If the message ”WAITING FOR CRT DATA” appears on the CRT/MDI,
it indicates that the CRT/MDI has started normally.
(1) Confirmation item
Determine which of the following problems are evident.
1. Nothing is displayed on the CRT/MDI.
2. Only the message ”WAITING FOR CRT DATA” appears on the
CRT/MDI.
3. A position display appears on the CRT/MDI, and the keys are
ineffective.
(2) Causes and remedies
1. If nothing is displayed on the CRT/MDI.
D The power being supplied to the CRT/MDI is abnormal
(check the power supply).
D The CRT/MDI is defective (replace the CRT/MDI).
2. If only the message ”WAITING FOR CRT DATA” appears on the
CRT/MDI.
D Incorrect cable connection (correct)
D Defective cable (repair or replace)
D Defective CRT control module (replace)
D No CRT control module installed (install)
D Incorrect setting of rotary switches RSW and MTSW (correct
the setting)
3. A position display appears on the CRT/MDI, and the keys are
ineffective.
D DPL/MDI left connected (remove)
D Defective cable (repair or replace)
7.8
WHEN
MANIPULATION IS
NOT POSSIBLE WITH
THE CRT/MDI
Points
Judgement of the point
Causes and remedies
1. When the display system
is in toruble