Memjet MACH 5 - The Printer; Dots or Lines Printed on Media

SECTION 3
TROUBLESHOOTING
17
The Printer
Troubleshooting Tip: If you recently replaced the Main Board and you are experiencing problems; please
see “Replacing the Main PC Board (MPCA)” and “MPCA (Main Printed Circuit Assembly) Connections”;
to verify your connections. Also check for damaged wires and loose connections.
NOTE: The printer will not print if any of the five ink tanks are empty or missing.
Dots or Lines Printed on Media
CONDITION PROBLEM SOLUTION
Multiple horizontal black
lines are printed down the
length of the media.
You have exceeded
the maximum print
width of 8.5”.
Reduce paper width to 8.5” to avoid exceeding
the max print width of printer.
NOTE: This symptom only occurs with older
firmware. Contact Tier 2 Support to update the
printer’s firmware.
A thick horizontal black line
is printed at or near the
trailing edge of the media.
Purge Bar (intrapage
spitting) is hitting
trailing edge of
media.
Media is hesitating
or skewing during
transport.
Hole in media is
passing over the
Paperpath Entry
sensor.
Media is oddly
shaped (running
media with open
flap at trailing edge).
To help keep nozzles from drying (clogging); all
nozzles of the printhead are purged, between
each page (intrapage spitting).
Check/adjust media feed setup.
Check for proper install of Forwarding Roller
Guide Assembly.
Check for obstruction within the Print Engine.
Rotate media and image so hole in media does
not travel over the Paperpath Sensors.
Adjust the “Purge Bar Position” value; located
in the User Interface Menu of the Toolbox.
Default = 3000. If you don’t see this feature in
the User Interface Menu; please contact Tier 2
support to update the printer’s firmware.
Use compatible media.
Very small dots (gray
overspray) are being printed
down length of media.
These dots are
formed by interpage
nozzle spitting.
Controlled by the
KWS (Keep Wet
Spitting) setting.
Interpage (on the page) nozzle spitting is
normal. This feature is used to help keep nozzles
from drying (clogging).
With firmware version 110928_u and higher the
Toolbox provides a “KWS Setting” that can be
used to adjust the Level of spitting.