Operation Manual

Message Display
The message display gives information in the form of short messages. The six messages listed
below are displayed during normal warm-up and printing.
Message Meaning
The printer is self-testing after power-up.
The printer is warming up and is not ready.
The printer is ready to print.
The printer is receiving data, generating graphics, reading an memory card, or
printing.
The printer is waiting for a command that says the job is over before printing the
last page. Pressing the
FORM FEED
key allows you to obtain the last page
immediately.
The printer prints the last page after a waiting period.
Other messages appear when the printer needs the operator’s attention as explained in
Chap-
ter 5
.
Interface Indicator
The interface indicator shows which of the printer’s interfaces is currently active. It uses the
following abbreviations:
Standard bi-directional parallel interface
Serial interface (RS-232C/RS-422A)
Optional interface
The , , or indicator flashes when the printer is receiving and has received all
the data, and then remains on.
Resolution Indicator
This shows the current printing resolution. The default is 600 dpi (dots-per-inch) in the HP
LaserJet 4 Plus emulation mode and 300 dpi in other emulation modes. The printer’s resolu-
tion can be selected using the printer’s control panel (See the last page in this manual.).
2.1. Control Panel
2-2