
8. TROUBLESHOOTING
B–62835EN/01
276
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 –
If the status shows the above state, the system is normal.
Therefore, display system may be faulty.
If you have a DPL/MDI, check whether it can be used to manipulate the
system.
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
unit, it indicates that the CRT/MDI unit has started normally.
(1) Confirmation item
Determine which of the following problems are evident.
1. Nothing is displayed on the CRT/MDI unit.
2. Only the message ”WAITING FOR CRT DATA” appears on the
CRT/MDI unit.
3. A position display appears on the CRT/MDI unit, and the keys
are ineffective.
(2) Causes and remedies
1. If nothing is displayed on the CRT/MDI unit.
D The power being supplied to the CRT/MDI unit is abnormal
(check the power supply).
D The CRT/MDI unit is defective (replace the CRT/MDI unit).
2. If only the message ”WAITING FOR CRT DATA” appears on the
CRT/MDI unit.
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 Touch panel connection module or HSSB connection
module installed in place of the CRT control module (install
the CRT control module)
D Incorrect setting of rotary switches RSW and MTSW (correct
the setting)
3. A position display appears on the CRT/MDI unit, and the keys
are ineffective.
D DPL/MDI left connected (remove)
D Defective cable (repair or replace)
8.8
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