Testing The X-Axis Servo Motor; Logic Board Assembly Troubleshooting - Ioline FJ Printer Service Manual

60 Ioline FJ Printer & StudioJet Service Manual
4. Unplug the yellow and black wires from the motor.
5. Using a piece of metal (like a paperclip) touch the two connec-
tor lugs on the motor. (Putting the paperclip through the holes
in the lugs works well.)
6. Move the carriage back and forth slowly by hand.
7. While moving the carriage back and forth, remove the paper-
clip from the lugs on the motor.
8. You should notice a huge difference in resistance when touch-
ing the lugs together and not. If this is the case, the servo motor
is good and does not need replacing.
9. If you notice NO difference when touching the two lugs to-
gether and and not, the motor is most likely bad and needs to
be replaced.

Testing the X-axis servo motor

1. Follow the procedure for removing the bottom cover.
2. Locate the X axis motor behind the main PCB inside the plotter
body.
3. Unplug the red and black wires from the motor.
4. Using a piece of metal (like a paperclip) touch the two connec-
tor lugs on the motor. (Putting the paperclip through the holes
in the lugs works well.)
5. Rotate the main drive shaft by hand.
6. While rotating the shaft, remove the paperclip from the lugs on
the motor.
7. You should notice a huge difference in resistance when touch-
ing the terminal lugs together and not. If this is the case, the
servo motor is good and does not need replacing.
9. If you notice NO difference when touching the two terminal
lugs together, the motor is most likely bad and needs to be
replaced.

Logic board assembly troubleshooting

The electronic logic board is constructed of many advanced electron-
ic components with fi ne pitch connections. Very few of the compo-
nents are user serviceable.
The table below explains indicator lights and test points on the logic
board and some troubleshooting steps to resolve user serviceable
issues.