HP 4 Plus Manual

							Setting the Cold Reset Default
A Cold Reset procedure returns most user-selectable Control
Panel Menu selections to their factory defaults, including Paper
Size and Tray 1 Size settings.  All 220/240 printers are set from
the factory to default to A4 paper size settings when the user
performs either a Cold Reset or Factory Default Reset procedure.
However, when a Formatter is replaced after leaving the factory
(due to a need for service), a Cold Reset or Factory Default Reset
will result in apaper size of Letter for the default paper size.
To reset the default Cold Reset (and Factory Default Reset) paper
size value to A4:
1Enter the Service Mode as described previously.
2Press the [Menu] key to display SE\bVI\fE MENU.
3Press the [Item]  key to display \f\b PAPE\b=LETTE\b
4Press the [Value+/-]  key to toggle between Letter and A4 paper. 
5Press the [Select] key to save your selection.
6Press [Go] to exit the Service Mode.
For more information regarding the Cold Reset procedure, refer
to Chapter 3 of this manual.
LaserJet 5/5M/5N Printer  B-27 
						

							Skip Demo
If set to TRUE, will disable any test and demo pages containing
the HP logo.  This setting should only be used by OEMs not
wishing to give user-access to these pages.
Big Data
This item will allow a user to increase the amount of status
readback buffer if the item is set to ON.  The default for this item
is OFF.  The printer must be power-cycled after changing this
value in order for the new buffer size to take effect.
Diagnostics
Allows a diagnostic mode for firmware developers.  Should always
be set to OFF (default value).
B-28 LaserJet 5/5M/5N Printer 
						

							Programming a Flash SIMM
A flash SIMM may be programmed while installed in the printer.
To program a flash SIMM.
1Hold down the Menu> , Item< ,  Value+ , and Select keys while
powering on the printer.  
2The printer will display  “P\bOG\bAM SLOT 4 ”.  To change the slot
number, press  Value+/-.
3Once the desired slot number is displayed, press  Select.
4The printer will display  “OK ”, followed by  “E\bASING SIMM .”   If
the SIMM is correcly earased, the printer will display  “STA\bT
DOWNLOAD .”   At this point, you may send the binary file to be
flashed to the printer.  
5The 16 characters on the VFD will flash until the download is
completed.  When the download is completed, power cycle the
printer.
LaserJet 5/5M/5N Printer  B-29 
						

							Changing the Control Panel Display Language
The default control panel display language is set for English.
Supported languages are: English, French, German, Italian,
Spanish, Finnish, Danish, Dutch, Swedish, Norwegian, Turkish,
Polish, and Portuguese.  Follow these instructions to change the
display language.  
1Switch OFF the printer.
2Press and hold Select while switching the printer ON until
SELE\fT LANGUAGE  appears in the display.
3After the power-on self test,  LANG=ENGLISH appears.  Press
[Value+/-]  until the desired language appears in the display.
4Press [Select]  to save your choice.  An asterisk ( *)appears next
to the language to indicate it is now the default.
5Press  [Go].  The On Line indicator is lit, and display messages
are now in the language you selected.
Note If the display language is changed, replace or
install the Control Panel Overlay to match the
selected language. See the index to Chapter 6 for
instructions on changing or installing the Control
Panel Overlay and Chapter 8 for applicable part
numbers.
B-30 LaserJet 5/5M/5N Printer 
						

							NVRAM Init
NVRAM Init clears the NVRAM to its initial state.  This reset is
used when the NVRAM becomes full and the user would like to
add additional personalities.  It is possible to reconfigure the
NVRAM so the new personalities have higher priority and the
older personalities, while they can still be run with factory
defaults, run without NVRAM.  This is done by clearing the
NVRAM and then adding the new personalities before adding the
older personalities.
To perform a NVRAM init, hold down the JOB CANCEL key
while power cycling the printer.  The English message, “NVRAM
INIT ” will be displayed briefly and the NVRAM will be initialized
before the rest of the system comes up.  Once the power-on self
test is finished, the message  “RESTORING FACTORY
SETTINGS ” will scroll.
Note The NVRAM init set the page count back to zero
and all other SERVICE MODE settings to
defaults, so it is necessary to reconfigure after
performing this initialization.  It also sets the
Tray 1 size to Letter, the envelope feeder to
COM10, and  the display language to English.
LaserJet 5/5M/5N Printer  B-31 
						

							Understanding the PCL Self Test
Printout
ReferenceExplanation (Refer to Figure B-4)
1 Printer Information lists printer specific statistics.  
Formatter Number shows the unique number assigned to
the formatter board. 
Firmware Datecode is the eight-digit date (YYYYMMDD)
code of the Formatter ROM. 
Page Count shows the number of pages the printer has
printed.
2 Installed Personalities and Options lists printer languages and all SIMM accessories that are installed.
3 Security lists whether the control panel is locked and whether the control panel has a security password.
4 Memory shows the total amount of installed memory, and indicates the amount of available memory for PCL
applications (such as font downloading software).
Information about the current I/O Buffering and Resource
Saving configuration appears here.  If the printer does not
have enough memory installed to enable these two
features, the amount of additional memory needed
appears.
5 Paper Handling Options list the installed paper handling
accessories.  These accessories may include the Duplex
Unit, Envelope Feeder, and the 500 sheet Lower
Cassette (Tray 3).
6 HP MIO information is reserved for the HP MIO and network statistics.  For some installed MIO options, this
block of information can be as long as 20 lines and three
columns.
Table B-20 Self Test Printout Items for the HP LaserJet 5
B-32 LaserJet 5/5M/5N Printer 
						

							Figure B-4 HP LaserJet 5 PCL Self Test Printout
LaserJet 5/5M/5N Printer  B-33 
						

							Infrared Communication
The HP LaserJet 5, 5M, and 5N printers are equipped with an
Infrared Datalink Association (IrDA) compliant port. The IrDA
specification allows “wireless ” transmission of print data between
a wide variety of hosts (primary) and peripheral (secondary)
devices. A primary device  — such as a PC or laptop computer  —
is capable of reading and writing data to another primary device
or writing to a secondary device, such as a printer. Secondary
devices are read-only; they cannot initiate their own
communication, and can only respond to a host command when
properly addressed.
The IrDA protocol uses a transceiver chip in both devices to send
and receive data packets. The packets are checked for validity,
and a response is sent by the secondary device indicating whether
the packets were complete or in error.
The IrDA protocol is contained in three layers:
•The physical electronics are the hardware elements in each
device for sending and receiving the data.
•The Link Access Protocol (LAP) layer controls the physical
layer, packetizes/unpacketizes data, and sets transmission
rates. 
•The Link Management Protocol (LMP) layer routes data to
and from the host operating system (DOS/Windows).
The data flow is shown in Figure B-5.
The LAP and LMP layers can reside in either firmware, software,
or a combination of both. There are different LAP and LMP
protocols for primary and secondary devices.
The HP LaserJet 5 printer has the complete secondary protocol,
and any host trying to communicate via the infrared (IR) port
must have the complete primary protocol installed. The primary
protocol software is the responsibility of the host supplier. It is
not provided by Hewlett-Packard with the printer.
IrDA host (or primary device) communications can be obtained
either via an internal IR port or an external IR accessory. Several
manufacturers offer complete accessory upgrades for both host
and peripheral devices.
B-34 LaserJet 5/5M/5N Printer 
						

							System Requirements
•Hardware
•Both the primary and secondary devices must be equipped
with an IrDA-compliant IR component. Older,
non-IrDA-compliant devices may not be compatible with the
HP LaserJet 5/5M/5N printers.
•Software
•The primary device must be loaded during boot-up with
software provided by the manufacturer for infrared operation.
•The primary device must be properly configured with an
infrared COM port, IRQ level, and base address value.
•The infrared port must be installed and selected in the
Printers section of the Windows Control Panel.
•The SIR transceiver pod (C2929A) accessory must be
purchased for the LaserJet 5, 5M, or 5N printer.
Protocol Serializer
IR Chip
Application
GDI DDI
Ptr DVR
IRLMP
IRLAP
IR Physical
Transmitter
Receiver Receiver
Transmitter
IR Physical
IRLAP IRLMP I/O Buffer Formatter
Data Packets & Queries Responsessecondarysecondarydevicedevice
primarydevice
ASCII Data
Windows
System
Standard Windows
LJ Printer Driver (SW)
IR Redirector
(Software)
IR Driver Packetizes 
Data (SW or FW) ASCII to 
Raster Data
ASCII 
Data Buffer
Unpacks Data
Checks Packets
Protocol
Deserializer
IR Chip
Figure B-5 IR Data Flow
LaserJet 5/5M/5N Printer  B-35 
						

							To Print Using the Infrared Port
The C2929A Infrared Transceiver must be plugged into the
infrared (IR) port on your HP LaserJet 5, 5M, or 5N printer,
located at the rear of the printer (Figure B-6). This port is
compliant with the specifications determined by the Infrared
Data Association (IrDA). On top of the transceiver pod is a status
light that indicates when the port is activated. To use the IR port,
you need to use a portable device that also includes an
IrDA-compliant IR port and be within the range of operation (see
Figure B-7). 
The IR port is compatible with a wide variety of IrDA-compliant
portable devices; however, the method for printing will vary
depending on the type of device and the operating system in use.
Refer to the instruction manual for your portable equipment for
specific instructions on printing from that device.
The IR port works by receiving data similarly to a serial port,
however, without a cable and operates at speeds of up to 115 k
bits per second. When the IR connection is established, the status
light comes on. If the connection is broken or when the print job is
complete, the status light goes off. 
1Make sure the printer is in Ready Mode.
2Align your laptop computer (or other portable equipment) that
is equipped with an IrDA-compliant IR port within 3 feet (1 m)
of the IR pod and at an angle of plus or minus 15 degrees to
ensure printing (Figure B-5).
Figure B-6 IrDA Port Location
B-36 LaserJet 5/5M/5N Printer