IIRC this printer should have something called JetDirect card which is the usual way of printing to it from
AIX. All you need to do is define the IP address of the printer, either in DNS or /etc/hosts, then go to smitty to define a print queue. Use "smitty spooler" then select "Add a Print Queue", select hpJetDirect from the pop-up, then "Hewlitt-Packard" as the printer type, then select the device type. Depending on the filesets you installed with
AIX there will be a long or short list of HP models to choose from. If you don't see exactly the one you have you could try an 8100. I've found that most HP laserjet printers will work OK if defined that way.
HTH
Jim Lane