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Service Tests
4-17
HP DesignJet 430, 450C and 455CA Printers
If the test fails, to resolve the problem, try one of the following:
1 Switch OFF the Printer and manually moving the carriage along the
slider rod, check for obstacle or friction in the XĆaxis.
2 Check for a faulty or badly connected XĆaxis Encoder Cable.
3 Replace media motor ' page 8Ć23.
4 Replace electronics module ' page 8Ć13.
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.