HP 4 Plus Manual

Loading Paper into the Optional Lower Cassette 
Figure 3-13 Pull the cassette tray straight out of the printer.
Figure 3-14 Adjust the cassette for the paper size you wantto load.
Configuration 3-45 

Figure 3-15 Slide about 450 sheets of paper into the tray, upagainst the adjustable bracket that sets the
paper length.
Figure 3-16 Press down on the stack of paper until the top ofthe stack fits under the top edge of the back
green bracket.
3-46 Configuration 

Figure 3-17 Push down the left corner of the stack until thepaper is secured undered the metal clip.
LETTER
EXEC
A4 LEGAL
Figure 3-18 Set the knob on the top right of the cassette to
the paper size you have loaded. 
Configuration 3-47 

Figure 3-19 Note: cassette MUST be full before adjusting  thetension. 
To adjust the tension, tap the stack of paper
several times and turn the leftmost knob on the
cassette until the arrows on the indicator align.
Tap the stack again and verify the arrows are
still aligned.
Figure 3-20 Slide the cassette back into the Lower Cassetteassembly.
3-48 Configuration 

Envelope Feeder Installation
For complete information about installing the Envelope Feeder,
see Envelope Feeder User’s Guide . This guide is provided with the
envelope feeder. The instructions below are not intended to
replace the information of the  Envelope Feeder User’s Guide.  
NoteThe LaserJet 4, 4 Plus, and 5 printers all use
different envelope feeder products.
To install the Envelope Feeder:
1Turn OFF the printer.
2Open the MP tray.
3Remove the black plastic cover from inside the printer (see...

4Insert the Envelope Feeder firmly into the printer (see Figure
3-22).
5Turn ON the printer.
LaserJet 4 and 4 Plus
The envelope size (EE \fRAY=) appears on the display when the
envelope feeder is installed and loaded with envelopes.  The
envelope size can be selected through the Control Panel.   Paper
jams can result if the envelope size selected does not match the
envelopes loaded into the envelope feeder.
LaserJet 5
The envelope size ( ENV FEED=) appears in the  CONFIG MENU when
the envelope feeder is...

SIMM Installation
SIMM installation is covered in detail in the the printer’s  User ’s
Manual  and in the kit that accompanies the SIMM.  The
instructions shown here are not intended to replace these sources.
Follow these instructions to install memory, language, and flash
SIMM boards. Install all types of SIMM boards in the same
manner.
Protecting the SIMM Board 
SIMM boards can be damaged easily by small amounts of static
electricity. To prevent damage from static electricity:
•Touch the surface of the...

Any SIMM board can be installed in any of the four SIMM slots.
Because the slots are close together, we recommend installing
them from right to left, starting with slot 1 and ending with slot 4.
Figure 3-23 Identifying the Four SIMM Slots
3-52 Configuration 

Memory Requirements
A page’s complexity (rules, graphics, or dense text) may exceed
the printer ’s ability to create the image rapidly enough to keep
pace with the printing process. If a page is too complex, only part
of the page prints, and some print data loss is likely.  In such
cases, a  21 PRINT OVERRUN  message (signifying possible loss of
print data) or a Clearable Warning message appears in the
display.  
PCL Only PostScript Only
Resolution 300 dpi 600 dpi 300 dpi 600 dpi
Letter/A4 Pages
1
Page...

CautionWhen removing a board from the antistatic
package, avoid touching the metal traces on the
SIMM board.
For memory boards, compare the part number on the outside of
the package to the part number in the table below. If you have
not received the correct board, notify your authorized
Hewlett-Packard dealer immediately.  
The LaserJet 4 Plus Optional Memory (C3130A, C3131A,
C3132A, C3133A, or C3146A) is not compatible with the HP
LaserJet 4. If the LaserJet 4 Plus Optional Memory  is installed
in the...