GRAPHTEC FCX4000 - When It Does Not Work Rightly

FCX4000-UM-251-9370 9-2
9 TROUBLESHOOTING
9.2 When it does not work rightly
Symptom Possible Cause Conrmation item Solution
The "X POSITION
ALARM" is displayed.
The Y bar moves to the
right side slowly after the
power was turned on,
and then it hit to the right
side.
The X home sensor
cable is broken.
Conrm the X home
sensor cable is not
broken.
(Yes) Replace the X home
sensor cable.
(No) Replace the X home
sensor.
The X home sensor is
defective.
Is the X home sensor
working?
(No) Replace the X home
sensor.
(Yes) Conrm the X motor is
turning.
The Y bar moves quickly
after the power was
turned on, then the “X
POSITION ALARM” is
displayed.
The X motor is defective. Is the X motor turning? (No) Replace the X motor.
The “Y POSITION
ALARM” is displayed.
The Pen Block moves to
the top side slowly after
the power was turned
on, and then it hit to the
top side.
The Y home sensor
cable is broken.
Conrm the Y home
sensor cable is not
broken.
(Yes) Replace the Y home
sensor cable.
(No) Conrm the X exible
cable is not broken.
The X exible cable is
broken.
Conrm the X exible
cable is not broken.
(Yes) Replace the X exible
cable.
(No) Conrm the Y home
sensor is working.
The Y home sensor is
defective.
Is the X home sensor
working?
(No) Replace the X home
sensor.
(Yes) Conrm the Y motor is
turning.
The “Y POSITION
ALARM” is displayed.
And the Y motor does
not rotate.
The Y motor driver IC
on main board was
broken by the defective
X exible cable.
Conrm the U32 (E-
L6203) is not broken.
Conrm the X exible
cable is not broken.
(Yes) Replase the main
board and the X exible
cable.
The Y bar moves quickly
after the power was
turned on, then the “Y
POSITION ALARM” is
displayed.
The Y motor is defective. Is the Y motor turning? (No) Replace the X motor.