4-28
Diagnostic Tests and Utilities
HP Designjet 4000/4020 Printer Series Service Manual
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5. Sensors Test
The purpose of this test is to verify the operation of the following Sensors:
îš„ Window Sensor.
îš„ Printhead Cleaner (PHC) Access Door Sensor.
îš„ Media Lever Sensor.
îš„ Media Sensor.
IF POSSIBLE ALWAYS PERFORM THIS TEST BEFORE REPLACING A
RELEVANT SENSOR. IF THIS TEST PASSES, DO NOT REPLACE THE
RELEVANT SENSOR.
Perform the Sensors test as follows:
1 Before starting, first make sure that:
îš„ The Window is closed.
îš„ The Printhead Cleaner Access Door is closed.
îš„ The Media Lever is in the lowered position.
îš„ Media is loaded.
2 In the Diagnostics Tests submenu, scroll to "5. Sensors Test" and press Enter.
3 The Printer will start to initialize and the Front Panel will display the following
messages:
îš„ Starting Gamut.
îš„ Starting Tests GPIO.
If there is a failure at this point, the Front Panel will display System Error
Code 01.0:10. For more information on troubleshooting this error code,
refer to Page 2-3.
4 Before starting to test the sensors, the following message will be displayed.
Press any key to continue:
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