Testing The Control Panel Keys And Home Sensors - GRAPHTEC FC2250 Service Manual

8.17 Testing the Control Panel Keys and Home Sensors

Run this test if a control panel key or home sensor has malfunctioned.
(1) Set the SW1 DIP switch as shown below and then turn on the plotter.
Set bits 1, 2, and 8 to OFF
1 2 3 4 5 6 7 8
(2) The menu below appears, so press the panel key corresponding to each character and check that its
character properly display to the upper section.
OPCERLUD00TN4321XY
Press each key on the control panel; the below characters will move to upper section.
Key
RIGHT ARROW
DOWN ARROW
UP ARROW
LEFT ARROW
F1
F2
F3
F4
NEXT
TEST
ENTER
CONDITIONS
COPY
ORIGIN
X home sensor
Y home sensor
Normal status : All characters are shown in the lower section.
Key Test
While the key is pressed : corresponding character is moved to upper section.
The PAUSE key can be checked by observing its lamp.
Sensor Test
The status of each sensor is displayed on the LCD panel.
OPCERLUD00TN4321XY
Display Sensor name
2nd bit X home sensor
1st bit Y home sensor
If a sensor is not operating properly, check its wiring, its connector contact, and the position of the sensor
dog. If everything checks out all right, either the sensor or main board may be defective.
In this case, initialize the NOV-RAM and then run the sensor test again.
As a temporary measure for dealing with a defective sensor, turn off the plotter, set Bit 6 of the DIP
switch to OFF, and then turn the plotter back on.
FC2250-UM-251-9370
ON
OFF
--->
Status of LCD
18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
R
D
U
L
E
C
P
O
--->
Operation when the High/Low level changes
When the dog blocks the sensor
Same as the above
P
O CERLUD00TN4321XY
2
3
4
N
T
OPCERLUD00TN4321 Y
8-28
8. ELECTRICAL ADJUSTMENTS
1
X
Y
X
X
Y