HP 4 Plus Manual

							Serial Cable Pin-outs 
The following cable diagrams show the cable pinouts for the most
common serial configurations.
DB-9 RS-232 Serial Connection — HP LaserJet 4 
If the computer has a serial port with 9 pins, use the cable or
equivalent for the HP LaserJet 4.
Figure 3-7 24542G Cable Pinout for 25 to 9 Pin Connector
Configuration 3-35 
						

							DB-25 RS-232 Serial Connection — HP LaserJet 4 Plus/5
If the computer has a serial port with 9 pins, use the C2932A or
equivalent cable for the HP LaserJet 4 Plus.
Figure 3-8 C2932A Cable Pinout for 9 to 9 Pin Connector
3-36 Configuration 
						

							DB-25 Serial Connection — HP LaserJet 4  
If the computer has a serial port with 25 pins, use the 17255D
cable or equivalent for the HP LaserJet 4.
Figure 3-9 17255D Cable Pinout for 25 to 25 Pin Connector
Configuration 3-37 
						

							DB-25 RS-232 Serial Connection — HP LaserJet 4 Plus/5
If the computer has a serial port with 25 pins, use the C2933A or
equivalent cable for the HP LaserJet 4 Plus.
Figure 3-10 C2933A Cable Pinout for 9 to 25 Pin Connector
3-38 Configuration 
						

							RS-422A Serial Connection (Not available on the HP
LaserJet 4 Plus or 5 printers)
If you are configuring the computer to use an RS-422A serial port,
you need a special cable. Contact the computer or printer network
manufacturer to see if an RS-422A cable is available. If no cable
is available, contact your computer manufacturer for your
computer pin assignments and have a cable constructed.  
RS-422A Serial Configuration (LaserJet 4 only)
The default configuration for the serial port on the printer is for
RS-232C serial communication. To set the printer to use RS-422A
serial communication, change the control panel Serial Menu’s
SERIAL  setting to  SERIAL=RS-422.  
Note Hardware pacing for RS-422 serial
communication is not available on the printer.
Figure 3-11 RS-422A Cable Pinout
Configuration 3-39 
						

							Modular I/O Configuration
The printers are equipped with a modular I/O slot. A modular I/O
interface card can be plugged into that slot to increase the
number of interfaces available.
A modular I/O card can provide increased printer performance
when printing from a network. In addition, a modular I/O card
provides the ability to place the printer anywhere on the network.
This eliminates the need to attach the printer directly to a server
or a workstation, and enables you to place your HP LaserJet
printer closer to your network users.
NoteWhen you install a MIO card, you may need to
perform a Cold Reset to reinitialize the printer
’s
control panel.  
The HP JetDirect Card allows these printers to operate in
multiple operating system networks.
To determine the appropriate MIO solution for a specific host
system/application environment, refer to the latest edition of the
“HP Peripherals Connectivity Solutions Guide. ”
3-40 Configuration 
						

							Printer Drivers
Install Printer Drivers and Utilities 
Printer drivers are specialized programs designed to allow
specific software applications to function with the HP LaserJet
printers. Printer utilities include such things as the HP Explorer
program modules, which enhance the usability of the printer and
provide convenient access to printer features outside of specific
software applications.
How to Obtain Printer Drivers
First, check the software’s printer selection feature to see if the
printer is listed among the available printers. If it is not, run the
software ’s SETUP or INSTALL program to install a  “printer
driver ” or  “printer file ” for the printer.
Here are some ways to obtain printer drivers and Software
Application Notes for HP LaserJet printers: 
•Check the Printing Software package to see if it includes a
driver for your software. 
•Order an updated driver from the software vendor.
•Call Hewlett-Packard at 970-339-7009.
•Obtain a driver request form by fax through HP FIRST 
(call 1-800-333-1917) U.S. only.
•Download a driver through CompuServe’ s HP Forum. To sign
up for CompuServe, call 1-800-524-3388.
Note  While waiting for a specific HP LaserJet printer
driver, you can substitute a similar printer driver
(such as a driver for the HP LaserJet III, IIIP, or
4 printer). These substitute drivers will allow you
to use the printer, but they do not support all of
the printer’
s features. 
Configuration 3-41 
						

							DOS Utilities
Use the DOS Utilities to install printer drivers for MS-DOS
applications. Printer driver software for some common software
applications are included the DOS Utilities. See the Doing
Business With HP  section of Chapter 1 for information on
software drivers not included with the LaserJet DOS Utilities.
A DOS Utilities disk is shipped with every printer. If the DOS
Utilities is not installed on the host computer, look for the DOS
Utilities software disks in the documentation package that came
with the printer and install the software.
3-42 Configuration 
						

							Packing the Printer  
Repackaging Instructions   
The printer warranty is for one-year and must be returned to an
Authorized HP service center for service. If the original packaging
material is no longer available, replacement packing and
shipping material is available from HP’s Support Material
Organization (SMO) for a charge. To order replacement packing
and shipping material, call: 
1-800-227-8164 (U.S.)
416-678-9430 (Canada)
To order the shipping box and packing inserts for the printers,
ask for part number C2001-00906.
In other countries, return the printer to the selling dealer or the
HP-authorized service center for your service area.
Packing Checklist •
Remove and retain any accessories that were installed in the
printer. This includes:
•Toner Cartridge
•Optional Lower Cassette
•Envelope Feeder
•Accessory Cartridge
•Duplex Assembly (LaserJet 4 Plus/5)
•Optional Memory, Personality SIMMs, or Flash
•Include print samples that indicate the problem.
•If the problem is associated with media, include 50-100 sheets
of the media causing the problem.  
Configuration 3-43 
						

							Installing The Optional Lower
Cassette   
NotePlease see also the Service Notes section for
proper use and adjustment of the lower cassette.
These printers have an optional 500-sheet Lower Cassette which
is installed in the field. Follow these instructions to install the
Lower Cassette.
1Disconnect the cables from the printer.
2Unpack the 500-sheet Lower Cassette Assembly.
3Place the Lower Cassette base (without its paper tray) in the
selected location.
4Place the printer on top of the Lower Cassette Assembly, as
shown in Figure 3-12.
NoteInstall the printer onto the Lower Cassette Base
so that the alignment pins on the cassette base
mate with the holes in the bottom of the printer.
5Reconnect the printer cables and run a self test to ensure the
lower cassette is recognized by the printer.
Figure 3-12 Installing the Printer on the Lower Cassette
3-44 Configuration