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Troubleshooting
1-11
HP DesignJet CP Series Printers
3 Is the client using Best Mode on Coated Media in high humidity?
D In this particular case, head crashes could occur due to worst casing.
Recommend a change of media, print mode, or humidity conditions.
4 What is the Firmware Revision? (Only applicable to HP DesignJets
2500CP and 2000CP)
D Must be A02.01 or more recent. If not, upgrade.
D Explanation - In earlier releases of firmware a media jam/head
crash can be caused at the start of a plot. This can occur in the
“POME” pen alignment or closed loop color calibration, because
the leading edge of the media is brought back very close to the
Media Separator edge. If the edges cross, the media can lift up
when it is advanced, causing a media jam or head crash. It is more
likely to occur the more curled the media is.
5 Check the Media Separator (Only applicable to HP DesignJets
2500CP and 2000CP)
D For units fabricated before Serial Numbers C4703A ESA7C04586 and
C4704A ESA7C10343. If the Media Separator is detaching do not
stick it down again, as it will detach again. Also, never reposition a
Media Separator, because it has an extremely tight positioning
tolerance. For Media Separators that are lifting off the Overdrive
Assembly, replace the entire Overdrive Assembly.
D Explanation - The previous adhesive used under the Media
Separator can detach from the Overdrive Assembly. New
Overdrive Assemblies use a much better adhesive – it can be
easily differentiated from the old adhesive because it is white
instead of transparent. The Media Separator should never be
repositioned; it has an extremely tight tolerance. If it is too far
from the linear blade it can cause media crashes against the
Linear Blade. If it is too close it can cause media jams between the
leading edges of the media and the Media Separator.
6 Did the failure occur at the end of the media roll?
D There are two known failure modes in this case. One is with Vinyl
media, in which case the end of the media was glued too strongly to the
roll, which can cause a head crash. The other is with Coated Media,
where some rolls have the final edge of the media bent in a “C” shape
which could cause a head crash when passing under the carriage. In
both cases the problem has been fixed and a new roll of media should
solve it.