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Diagnostic Tests and Utilities
HP Designjet 4000/4020 Printer Series Service Manual
9. PHC Maintenance
The purpose of this Service Utility is to reset the black printhead cleaner
once it has been replaced.
Perform the Black Printhead Cleaner reset utility as follows:
1 In the Service Utilities submenu, scroll to "PHC Maintenance" and press
Enter.
Use UP and
DOWN keys
to go through
the digits
Press Enter to
enter PHC
Maintenance
PH
O
N
E
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