GRAPHTEC SignJet JS310-25ES, Service Manual, Page: 103 / 141

11. Troubleshooting
96 JS310-UM-251-9370
Symptom Cause Solution
The images overlap. The bi-directional band adjustment is
incorrect. Perform the bi-directional band
adjustment procedure (see Section 8.9 Bi-
directional Printing Band Adjustment).
If you replace the media with a different
type, adjust the height of the print heads
or change the printhead carriage speed,
this adjustment procedure must be
performed.
There is a lot of blurring on the
image. The heater setting value is too low. Blurring will occur if the heater setting
value is too low for the media being used.
Raise the setting value.
If phenomena such as the media shifting
occur and the heater setting value cannot
be increased, lower the printhead carriage
speed.
The media cannot be fed at all. The media feed motor is not operating. Check the selector switch on the media
feeding system and the direction selector
switch setting (see Section 7.1 Loading
the Media).
The press rollers are raised. Lower the press roller control pole.
11.3 Cleaning cannot be performed
Symptom Cause Solution
The cleaning solution is not being
fed. Insufficient cleaning solution in the
solution tank. Check the level of the cleaning solution
in the solution tank. If it is low, add some
more cleaning solution.
The 3-way valve for the cleaning
solution tank is shut off. Move the lever on the 3-way valve to the
supply position.
There is a bend somewhere in the ink
supply tube. Straighten out the bend.
Ink is being fed instead of
cleaning solution. The tubes have been connected
incorrectly. Check whether the ink tank and solution
tank tubes have been connected correctly.
If they have been connected incorrectly,
clean all the solution tank tubing and the
incorrectly connected ink tank tubing,
and then feed cleaning solution and ink
through them once again as appropriate.
Do not mix contaminated cleaning
solution with fresh cleaning solution.