Paxar 676 User Manual page 52

Problem
Print registration is off in
the web direction.
Print contrast is too light or
dark.
Voids in print image in the
feed direction.
Machine continually stops
with an erroneous
interlock condition.
52 • Electrical Trouble Shooting
Probable Cause
1) Machine incorrectly threaded.
2) Web guides incorrectly adjusted.
3) Unwind incorrectly adjusted.
4) Incorrect DIP switch settings on
the Thermal Control Board.
1) Incorrect strobe setting selected
in the format.
2) Incorrect strobe setting in the
machine setup.
3) Misadjusted print head position.
4) Misadjusted print head pressure.
1) Ink misaligned with format.
2) Print head dirty.
3) Faulty print head.
4) Misadjusted print head position.
5) Misadjusted print head pressure.
6) Worn platen roller.
1) Sensor uncalibrated.
2) Sensor position misadjusted.
3) Ink sensor type (light / dark)
incorrect in the format for the
ink type being used.
Corrective Action
1) Check and rethread the media as needed. Refer
to "Loading Stock".
2) Check and adjust as needed. Refer to "Web
Guide Adjustment".
3) Check and adjust as needed. Refer to "Web
Guide Adjustment".
4) Check and reset DIP switches as needed. Refer
to "TCB Dip Switch S2 Settings".
1) Using Formatter check and adjust the strobe
setting according to the media and ink being
used.
2) Enter the setup menu and readjust the strobe as
needed.
3) Set print head position. Refer to "Print Head
Tangent Point".
4) Set print head pressure. Refer to "Print Head
Pressure Setting".
1) Adjust ink position on the arbors to achieve full
ink coverage over all fields on the format.
2) Power off the machine clean the print head and
platen. Refer to "Print Head Cleaning".
3) After cleaning head and running the test pattern
to confirm that a void still exists, replace the
print head.
4) Set print head position. Refer to "Print Head
Tangent Point".
5) Set print head pressure. Refer to "Print Head
Pressure Setting".
6) Replace platen roller.
1) Recalibrate the sensor from the front panel
using the "Calibrate Sensors" mode. Refer to
"Optical Sensor Electrical Calibration".
2) Determine which sensor and relocate
accordingly.
3) Either change the ink or the ink type in the
format.