4 • Troubleshooting/Diagnostics
the Print Head
You can perform this procedure when you suspect, or have seen:
bad printing, even after changing the ink cartirdge
1. Remove print head and place the print head on its back side on the ab-
2. Locate a bottle of clear ink (PN# 4Y1-9107, it can be ordered as a Service
part). Pour a small amount of clear ink in the ink cap. Lightly moisten the
cleaning swab with clear ink.
3. Clean the print head surface (on the print head removed from machine)
with the cleaning swab.
Always use a new cleaning swab to avoid permanent damage on the
print head surface (discard after use). Also, the cleaning swab should
be used to wipe in one direction only.
Print Head Removed and
Placed on its Back Side
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
Clear Ink in Ink Cap