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User Manual Model 676 LOKPRINT® Electrical Trouble Shooting •
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• 43
Print
Problem Probable Cause Corrective Action
Machine advances stock
but does not print.
1) Print head cable unconnected or
faulty.
1) Power off the machine and reinsert the
offending connector or replace cable.
2) Print head faulty. 2) Replace print head.
3) Head Driver Board unplugged or
faulty.
3) Check Head Driver Board / AT board
connection and or replace Head Driver Board.
Print registration is off in
the feed direction.
1) Print position is incorrect. 1) Enter the setup menu and readjust the print
setting as needed.
2) Field(s) position incorrect in the
format.
2) Using formatter - check and readjust the field(s)
position(s) as needed.
3) Bound platen roller. 3) Check that the platen roller turns freely on it's
shaft. If it does not replace it.
Print registration is off in
the web direction.
1) Machine incorrectly threaded. 1) Check and rethread the media as needed. Refer
to "Loading Stock".
2) Web guides incorrectly adjusted. 2) Check and adjust as needed. Refer to "Web
Guide Adjustment".
3) Unwind incorrectly adjusted. 3) Check and adjust as needed. Refer to "Web
Guide Adjustment".
4) Incorrect DIP switch settings on
the Thermal Control Board.
4) Check and reset DIP switches as needed. Refer
to "TCB Dip Switch S2 Settings".
Print contrast is too light or
dark.
1) Incorrect strobe setting selected
in the format.
1) Using Formatter - check and adjust the strobe
setting according to the media and ink being
used.
2) Incorrect strobe setting in the
machine setup.
2) Enter the setup menu and readjust the strobe as
needed.
Voids in print image in the
feed direction.
1) Ink misaligned with format. 1) Adjust ink position on the arbors to achieve full
ink coverage over all fields on the format.
2) Print head dirty. 2) Power off the machine clean the print head and
platen. Refer to "Print Head Cleaning".
3) Faulty print head. 3) After cleaning head and running the test pattern
to confirm that a void still exists. Replace the
print head.
4) Worn platen roller. 6) Replace platen roller.
Machine continually stops
with an erroneous
interlock condition.
1) Ink Sensor uncalibrated. 1) Recalibrate the sensor from the front panel using
the “Calibrate Sensors” mode. Refer to "Optical
Sensor Electrical Calibration".
2) Ink Sensor position misadjusted. 2) Relocate correctly.
3) Ink sensor type (light / dark)
incorrect in the format for the ink
type being used.
3) Either change the ink or the ink type in the
format.