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Service Tests
4-11
HP DesignJet 430, 450C and 455CA Printers
If the test fails, to resolve the problem, try one of the following:
1 Clear any binding due to a media jam.
2 Turn the Printer off. Manually move the carriage along the carriage axis.
Check for any areas where the carriage may be binding.
3 Ensure that the belt and belt pulley are in correct working order. Remove
dirt from the pulley that could cause the belt to slip.
4 Remove dirt from the slider rod and chassis beam. Apply oil (Anderol
4068, HP part number: 6040Ć0858) to the carriage bushings.
5 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.
6 Ensure that the encoder strip is not inverted, damaged or absent.
7 Reconnect or replace the trailing cable ' page 8Ć8.
8 Replace the carriage assembly ' page 8Ć37.
Only replace one component at a time and perform the test
again before replacing another component. Using this procedure
you will be able to determine exactly which component failed.