HP 98568A Installation Instruction page 365

Note
HP 25638, 25648 and 25668 Printers
If the interface already has several cables connected to it,
connect the printer's cable to one of the other devices on the
interface.
4. Connect the Power Cord.
Connect the female end of the power cord to the power socket on the back
of the printer, and connect the other end to your power outlet.
5. Set the Address.
a. Turn your printer on.
b. Press the ON LINE key until the ON LINE indicator light turns off.
c. Press the CONFIG key and the FINE ADJ. keys simultaneously until the
number 20 appears in the display, then release them.
d. The current address will appear in the display. Set the address as follows:
• If this is the first (or only) printer you are connecting to the interface,
press the FINE ADJ. key until the number 1 appears in the display,
unless address 1 has been used elsewhere.
• If this is the second printer you are connecting to the interface, press
the FINE ADJ. key until the number 4 appears in the display, unless
address 4 has been used elsewhere. If it has, select any unused address.
e. Press the ENTER key to enter the new address and return the printer to
normal operation.
6. Record the Address.
Make a note that address 1 (or the alternate address you chose in step 5)
has been used and is no longer available on the interface you selected. Use
the "Address Record" form on the Chapter 6, "Mass Storage" tab for this
purpose.
Adding Printers 7 -17