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Service Tests and Utilities
HP Designjet 4500 Printer Series Service Manual
9 The following message will appear on the Front Panel. Remove the media if
it is still loaded and make sure you stay out of the Print Platen area if the
Window is open.
10 The Printer will now test the Media Drive moving in an open loop in one
direction and the following message will be displayed on the Front Panel.
Press any key to continue the test:
Check that the movement done is more than 100 encoder units (in absolute
value), if it is press any key to continue. If the movement done is less than
100 encoder units then open the Window and check for any visible
obstacles restricting the movement of the Drive Roller or the Overdrive
Assembly. In this case, press any key to finish the test.
11 The Printer will now test the Media Drive moving in an open loop in the
opposite direction and the following message will be displayed on the Front
Panel. Press any key to continue the test:
Check that the movement done is more than 100 encoder units (in absolute
value). If the movement done is less than 100 encoder units then open the
Window and check for any visible obstacles restricting the movement of the
Drive Roller or the Overdrive Assembly.
If the Encoder Units is less than 100, the front panel will display a warning
message. The Printer will request that you follow these instructions:
a Manually load a sheet of paper in to the Printer (an A4 sheet).
b The Printer will test the Media Drive moving in an open loop.
c Perform a visual check during the test. The Front Panel will ask you if
the paper moved or not:
– If the paper moved, the Front Panel will display System Error
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