Quick Reference Service Manual
5
HP DesignJet 430, 450C and 455CA Printers
System Error: Steady EKL Ć After replacing a new electronics module, it must be
configured either as a DesignJet 430, 450C or 455CA. If a new module does not show this
error, it means that it has been installed previously and was probably calibrated with other
parameters. After configuring the module, Error code Steady DLM will appear which means
the accuracy calibration must be done. After the accuracy calibration is done, all other
calibrations must be done. If configuring the module does not remove the error, even after
switching the Printer OFF and ON, then the EEROM in the main PCA is probably defective.
Before trying to replace the electronics module try clearing the EEROM and perform all the
calibrations again and see if that solves the problem.
System Error: Steady EK Ć Switch the Printer OFF and ON again and see if the error
remains. If the error appears continuously, replace the Electronics Module. The Calibrations
in the EEROM have been lost. Perform the Accuracy Calibration.
System Error: Steady FK Ć Fan faulty or badly connected. Faulty ROM SIMM. Faulty
RAM SIMM. Faulty Electronics Module.
System Error: Steady EM Ć Problems with the Cutter Assembly. Clear any binding due
to a media jam. Turn the Printer off. Manually move the carriage along the carriage axis.
Check for any areas where the carriage may be binding. Ensure that the belt and belt pulley
are in correct working order. Remove dirt from the pulley that could cause the belt to slip.
Perform the carriageĆaxis test and the servo/encoder test to check for problems with the
carriage motor, encoder strip, and electronics module. Remove dirt from the slider rod and
chassis beam. Apply oil (Anderol 4068, HP part number: 6040Ć0858) to the carriage bushings.
At high temperatures, and if the fan is not working correctly, the internal resistance of the
motor driver may increase, causing a decrease in the voltage between the motor contacts,
and a shutdown of the motor. Ensure that the encoder strip is not inverted, damaged or
absent. Reconnect or replace the trailing cable. Replace the carriage assembly.
System Error: Steady DEM Ć Something is causing excessive friction in the YĆaxis
(carriage axis). The carriage touches the bail as it moves.
System Error: Steady DFM Ć Incorrect routing of the motor cables. Electrical noise in
motors. Faulty motor encoder. Motor received an electrostatic discharge while operating.
System Error: Steady EFM Ć Damaged or broken encoder strip. Faulty or badly
connected trailing cable. Incorrect routing of the motor cables. Electrical noise in motors.
Faulty motor encoder. Trailing Cable received an electrostatic discharge while the Printer
was operating. Replace the Trailing Cable.
System Error: Steady EL Ć Faulty Cartridges. Dirty or incorrect media. Faulty Line
Sensor. Faulty Carriage Assembly. Faulty Electronics Module.
