2 Quick Reference Service Manual
HP DesignJet 430, 450C and 455CA Printers
What can I do if the Printer continuously rejects Cartridges?
If you are in Service Mode 1, the cover sensor is disabled. In order to test a
new Cartridge set, the Printer must be powered OF and and ON again.
Remove tape and align cartridges. When nozzle failures occur, clean the flex contacts on the
cartridge and in the Carriage. Remove all cartridges from the Carriage and try installing just
the rejected cartridge. If the cartridge is still rejected then replace the cartridge with a new
one. If the new cartridge is not rejected then check, one by one, if the other cartridges are
rejected or not. Replace the black cartridge with one with USE BEFORE date of May '96 or
later. Make sure that the springs that hold the Cartridges in the Carriage are not broken or
misplaced. Perform Carriage Test. Replace Trailing Cable or Carriage Assembly.
What can I do if the Media continuously crashes?
Check if the media loaded is HP approved. If not, advise the customer to use HP media and
check to see if the problem is now solved. If the antiĆstatic brush (located under the entry
platen) is damaged or removed, static charge can build up on the media. A charge can cause
the media to stick to itself and jam the Printer. Check and if necessary adjust the
carriageĆtoĆmedia distance and try to load the media again. The Drive Roller is installed
incorrectly. The overdrive wheels turn free in both directions, creating bubbles in the media.
Make sure that the Clutch assembly is installed correctly and is not faulty. Make sure that all
the starwheels on the bail assembly are correctly installed and turn properly. Make sure that
all the Media deflectors are installed.
What can I do if the Printer does not Power ON?
Check that the power cord is connected correctly. Check that the ROM SIMM (firmware) is
installed correctly in the correct slot (the slot furthest from you) at the back of the Printer.
Try to disconnect all the cables, apart from the Front Panel Cable, from the Electronics Module
and then try to power ON the Printer again. If nothing appears on the frontĆpanel display,
then replace the Electronics Module. If the Printer does Power On with the cables
disconnected, then the problem must be with another component of the Printer. To find the
faulty component, power OFF the Printer and connect one of the cables and power ON again.
Once the faulty component is connected, it will not allow the Printer to power ON. This
component should then be replaced.
What can I do if the Printer has problems with the Cutter?
If the Carriage Assembly has problems picking up the Cutter:
D Check that the cable for the FrontĆPanel Assembly is is not loose and is routed correctly
in the cover clips. A loose cable can be trapped by the Cutter, preventing the Cutter from
moving.
D Make sure that the Spittoon Assembly is correctly installed and is aligned with the
Overdrive Assembly. If the Spittoon is loose or mispositioned, the cutter will have
problems parking in the right cover.
If the media crashes when moving the Cutter:
D Make sure that there is no media trapped inside the Cutter mechanism. Remove the
Cutter to inspect it correctly.
D Remove the Cutter and make sure that both rotary blades are touching each other by the
flat sides and not the sloping sides. If the rotary blades are touching each other by the
sloping sides, you must reseat them.
D The Printer must be placed as close to the edge as possible to make sure that the media
that is coming out falls correctly, or else the cutter will crash into it.
