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Troubleshooting
1-5
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.
1 Remove tape and align cartridges: One frequent cause of cartridge
problems is that the user has forgotten to remove the tape from new
cartridges. Remove the tape.
2 Dirty pads: The connection between the carriage PCA and the cartridge
flex connector is made by means of a gold bubble on the flex connector
that touches a gold pad on the PCA. The Carriage Test (details ' page
4Ć12) includes a test of this connection. When nozzle failures occur, clean
the flex contacts on the cartridge and in the Carriage.
3 Continuity Problem: Remove all the 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.
4 Faulty cartridge: Some black cartridges (51640A) with USE BEFORE
dates of April '96 and earlier may have thinĆfilm damage. This means
that the material used for channeling ink behind the nozzles can crack
with aging. When this happens, ink seepage may cause many nozzles to
fail (eight or more). Replace the black cartridge with one with USE
BEFORE date of May '96 or later.
5 If the Cartridges are not inserted correctly into the Carriage, the
Cartridges will be rejected. Make sure that the springs that hold the
Cartridges in the Carriage are not broken or misplaced.
6 Perform the Carriage Test ' page 4Ć12.
7 Replace the Trailing Cable ' page 8Ć8.
8 Replace the Carriage Assembly ' page 8Ć37.