When It Does Not Work Rightly - GRAPHTEC FCX4000 Service Manual

9.2

When it does not work rightly

Symptom
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 Y bar moves quickly
after the power was
turned on, then the "X
POSITION ALARM" is
displayed.
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 POSITION
ALARM" is displayed.
And the Y motor does
not rotate.
The Y bar moves quickly
after the power was
turned on, then the "Y
POSITION ALARM" is
displayed.
FCX4000-UM-251-9370
Possible Cause
The X home sensor
cable is broken.
The X home sensor is
defective.
The X motor is defective. Is the X motor turning?
The Y home sensor
cable is broken.
The X flexible cable is
broken.
The Y home sensor is
defective.
The Y motor driver IC
on main board was
broken by the defective
X flexible cable.
The Y motor is defective. Is the Y motor turning?
Confirmation item
Confirm the X home
sensor cable is not
broken.
Is the X home sensor
working?
Confirm the Y home
sensor cable is not
broken.
Confirm the X flexible
cable is not broken.
Is the X home sensor
working?
Confirm the U32 (E-
L6203) is not broken.
Confirm the X flexible
cable is not broken.
9-2
9 TROUBLESHOOTING
Solution
(Yes) Replace the X home
sensor cable.
(No) Replace the X home
sensor.
(No) Replace the X home
sensor.
(Yes) Confirm the X motor is
turning.
(No) Replace the X motor.
(Yes) Replace the Y home
sensor cable.
(No) Confirm the X flexible
cable is not broken.
(Yes) Replace the X flexible
cable.
(No) Confirm the Y home
sensor is working.
(No) Replace the X home
sensor.
(Yes) Confirm the Y motor is
turning.
(Yes) Replase the main
board and the X flexible
cable.
(No) Replace the X motor.