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Diagnostic Tests and Utilities
HP Designjet 4000/4020 Printer Series Service Manual
10 When the PWM check is being performed, the following message will be
displayed on the Front Panel:
îš„ PWM test with paper.
11 Once the PWM check is done, the results will be displayed on the Front
Panel. Press any key to finish the test:
If there is a failure at this point, the Front Panel will display:
12 Once the test is completed, OK will be displayed on the Front Panel.
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