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Using this manual
This service manual contains information necessary to test, maintain, and service the following:
HP Designjet T120 Basic Printer 24 inch CQ891A
HP Designjet T520 Pro Printer 24 inch CQ890A
HP Designjet T520 Pro Printer 36 inch CQ893A
For information about using these printers, see the user's guide.
Readership
The procedures described in this service manual are to be performed by HP Certified service personnel
only.
Part numbers
Part numbers for printer service parts are located in
Parts and diagrams on page 126.
ENWW v