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4-4 Service Tests
HP DesignJet 430, 450C and 455CA Printers
Service Tests (Diagnostics)
The following is a list of all internal service tests available in the Printers.
Instructions for entering service mode 1 are given on page 4Ć6. Instructions
for entering service mode 2 are given on page 4Ć22.
1 Bail Cycle Test ' page 4Ć8
This tests the operation of the bail system, Service Station and the YĆaxis
by engaging and disengaging the bailĆlift mechanism and
capping/uncapping the cartridges to ensure a correct lifting action.
2 Front Panel Test ' page 4Ć9
The purpose of this test is to verify the operation of the frontĆpanel keys
and LEDs.
3 Carriage Axis (YĆaxis) Test ' page 4Ć10
The purpose of this test is to verify the operation of the components of the
Carriage Axis.
4 Carriage Test ' page 4Ć12
The purpose of this test is to verify the operation of the Carriage
subsystems, like the Line Sensor and analog multiplexer. This test also
checks the connection between the carriage flex circuit and the cartridges.
5 Sensors Test ' page 4Ć15
This tests the operation of the cover sensor, pincharm sensor and media
sensor.
6 MediaĆAxis (XĆAxis) Test ' page 4Ć16
The purpose of this test is to verify the operation of the components of the
Media Axis.
7 Bench Run ' page 4Ć18
This test has been designed to be used during the manufacturing stage and
not in the field. do not at anytime enter this test when troubleshooting the
Printer.
8 Modular Test ' page 4Ć19
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.