HP QMS 1660E - Manual (Page 171)

Optional
Interfaces
6-37 Printer Options
c Snap the daughterboard onto the two support posts and the
80-pin connector.
4 Replace the controller board and printer covers.
Use the instructions in the “Replacing the Printer and Controller
Board Covers” section of this chapter.
5 Reconnect all interface cables and the power cord, and then
turn on the printer.
6 Download the new print system software.
Use the instructions in “Updating System Software,” later in this
chapter.
Both the start-up page and the status page indicate that the
1200x1200 dpi daughterboard is installed.
Optional Interfaces
In addition to the three standard interfaces—parallel, serial, and
Ethernet—the QMS 1660E Print System has the option of using a