HP 450c Service Manual - Page 53

Modular Test This test has been created to check the interaction between various components of the Printer. It combines the following tests: D CarriageĆaxis test. D Carriage test. D MediaĆaxis test. D FrontĆpanel test. D Sensors test. This Service Mode does not include carriageĆaxis initialization. If the carriage starts somewhere out of the Service Station, it will hit the rightĆhand side of the Printer when the test begins, and the test will fail. Always make sure that the carriage is parked in the service station before starting this test. If one part of the test fails, the other parts continue regardless. Perform the Modular test as follows: 1 Make sure that the carriage is parked in the service station. 2 In service mode 1, press Modular Test (Media Source Key). 3 The printer first performs the FrontĆpanel Test and once it is fully completed (once all the keys are pressed) then continues with the rest of the above tests in parallel. 4 Refer to the following figure to check which LED is associated with which test. If the test passes, the following LEDs will be lit (ON). If the test fails, the following LEDs will be flashing: The test is continued on the next page. Service Tests HP DesignJet 430, 450C and 455CA Printers 4-19