HP Laserjet 4 Manual

Reset Menu 
Use Reset Menu function with caution. It can result in loss of
buffered page data or printer configuration data. Reset Menu is
activated by holding down both [Shift] and [Menu] for up to 10
seconds until RESET=MENU* appears. Use [+] or [-] to cycle through
items and [Enter] to select the item. The reset is executed by
pressing [On Line].
[Reset]
(and Menu
of Resets)A reset ([Shift] + [Menu]) displays a 07 RESET, clears the printer’s
page buffer, removes all temporary typefaces and macros, and...

Control Panel Menus
Figure 3-2 shows the menus and menu items available with the
basic printer configuration. Not all menu items are discussed in
this section. Only those items of specific interest from a service
standpoint, or items new to the printers are discussed in this
section. If options such as PostScript or a different I/O are
installed, new menu items automatically are added at the
appropriate location. For example, a PostScript Menu appears
following the PCL Menu.  
3-6 Configuration 

Figure 3-2 Control Panel Map
Configuration 3-7 

Item Options Explanation
COPIES 1* to 999Select any number from 1 to
999. 
PAPER
ENVELOPESLETTER* (110V printers),
LEGAL, A4* (220V printers)
EXEC
COM10* (110V printers),
MONARCH, DL* (220V printers),
C5, B5Sets default image size,
unless software setting
overrides it. 
ORIENTATION P*, LP means portrait (vertical)
and L means landscape
(horizontal) orientation.
FORM
(5 to 128 lines)60* (110V printers)
64* (220V printers)Sets vertical spacing from 5
to 28 lines.
MANUAL FEED OFF*, ONOnly for MP Tray. 
RET...

Item Options Explanation
FONT SOURCE I*
C
S
Mn (1-4)Internal fonts*
Cartridge fonts
Permanent soft fonts
SIMM Module: n=slot
number. Typefaces stored in
one of the four ROM SIMM
slots (M1=slot 1, for
example).
FONT NUMBER 0* to 999Number assigned to each
typeface.
PITCH 
or 
PT. SIZEPitch:
10.00*
Point:
12.00*Depends on the FONT
SOURCE and FONT NUMBER
selected.
SYM SET ROMAN-8
Many othersA unique grouping of all
characters in a font.
*indicates factory default.
Table 3-3PCL Menu Items
Item Options...

Item Options Explanation
MP TRAY FIRST*
CASS
MANUALPaper is selected first.
Operates as a PC tray.
Operates as a manual feed tray.
LOCK NONE*
MP
PC
LC
and combinationsNo trays are locked out.
The MP tray is locked out.
The PC tray is locked out.
The optional Lower Cassette is locked
out.
CLR WARN ON*, JOBIndicates a transient condition.
AUTO CONT OFF*
 ONWhen an error is encountered, printer
goes off line until [SHIFT] + [CONTINUE]
are pressed.
When an error is encountered, printer
goes off line for 10...

Item Options Explanation
IO BUFFER AUTO*
OFF
ONMemory is automatically determined
by the printer.
No memory is set aside.
Size can be manually adjusted
IO SIZE 10K and up With IO BUFER ON, adjust size in
increments of 10.
RESRCSAVE
AUTO*
OFF
ONSaves resources and extra memory
and personality SIMM are installed in
printer.
Printer automatically determines the
amount of memory to allocate to
personality.
No memory is allocated.
Additional memory management
selections appear.
PCL MEM
PS MENU0K and up...

Item Options Explanation
SERIAL RS-232*
RS-422 (HP LJ 4 only)Use the RS-422 when a longer cable
is needed.
PACING DTR/DSR*
XON/XOFFUse if the computer requires
hardware flow control.
Use if the computer requires software
flow control.
BAUD RATE 9600*
300 to 57600Tells how fast information will be
transferred from the computer to the
printer.
ROBUST XON
ON*
OFFAppears when pacing is set to
XON/XOFF. 
Printer sends XON when printer is put
on line or when sufficient buffer space
is available.
Printer sends...

Printer Features
Some of the important features of the HP LaserJet 4, 4 Plus, and
LaserJet 5 printers are described below.
Page Protection (HP LaserJet 4 only)
NoteThe default is PAGE PROTECT=OFF*.  Unless you
frequently get 21 PRINT OVERRUN messages, you
may not need to set a value for page protection.
Page protection reserves additional memory for the page image
process, allowing the printer to create an entire page image in
memory before paper starts through the printer. The memory
required for page...

Resource Saving (HP LaserJet 4 Plus and 5 only)
Resource Saving gives the printer the ability to save certain
entities such as permanent soft fonts, macros, symbol sets and
user-defined graphics patterns when the printer changes
personalities, resolutions or page protect modes. For example, if a
user switches the LaserJet 4 printer from PCL mode to
PostScript mode, all PCL soft fonts macros are lost. The HP
LaserJet 4 Plus/4M Plus printer would not clear these entities
from memory. When the user switches...