HP 4 Plus Manual

3Send the print job. The status light on top of the IR pod turns
on. (Printing a complex document or using a software print
spooler on your PC may delay the time it takes for the IR
status light to turn on.) If the status light does not turn on,
realign the port on your portable equipment with the pod,
resend the print job and stay within the range of operation
during printing.
4If you have to move the device, for example, to add paper,
make sure you stay within the range of operation to maintain
the...

If you still have problems printing, make sure you are using an
IrDA-compliant device and proper software and have selected the
proper port for printing.  
NoteThe IrDA standard for infrared communications
represents an emerging technology. Older
non-IrDA-compliant portable devices may not be
compatible with your HP LaserJet 5/5M/5N
printer. If you continue to have problems printing
using the IR port, contact the manufacturer or
dealer where you purchased your portable device
to verify compatibility with...

If all these elements are properly installed and configured, use
the IR test tool to test the IrDA protocol transmission and device
operation. This tool for troubleshooting IR communication
problems, shown in Figure 10, has been developed by Genoa
Technology, Inc., in cooperation with Hewlett-Packard. The part
number is 5062-4661 and can be ordered through HP Parts Direct
Ordering.
The IR test tool can be used with any IrDA-compliant primary or
secondary device, regardless of manufacturer.
To test the...

On HP Laser-Jet printers, a self-test page will be initiated by the
test.
If the “TEST ” LED goes out and the “ PASS” LED  fails to light,
the printer ’s IR port is not functioning correctly; check the
operator ’s instructions included with the IR test tool.
To test the host computer:
1Place the test tool on a table in front of the PC ’s IR port.
2Press the  “computer Test button.  The test tool will sequence
the LEDs.
If the  “PASS”  LED  light, the test was successful, indicating that
communication...

Infrared Port Not Responding
SituationSolution
The connection cannot be
established or the transmission
seems to be taking longer than
usual. Make sure the device you are
using is IrDA-compliant; look for
an IrDA symbol on the device or
refer to the manual for the device
for IrDA specifications.
Make sure  that the operating
system on your computer
includes an IR driver and your
application uses a HP LaserJet
5/5M/5N compatible printer
driver.
Make sure you have positioned
the device within the range of...

SituationSolution
The printer prints only part of a
page or document. The connection has been broken
during transmission. If you move
the portable device during
transmission, the connection can
be broken.  IrDA-compliant
devices are designed to recover
from temporary connection
interruptions.  Re-establish the
connection (depending on the
device you are using, you can
have anywhere from 3 to 20
seconds to re-establish the
connection)
The print job has been properly
sent to the printer, but the printer...

Index
!
12 PRINTER OPEN 7-18 
13 PAPER JAM 7-20
14 NO EP CART 7-25 
16 TONER LOW 4-10, 7-25 
21 PRINT OVERRUN 3-53 
41.1 ERROR 7-28 
41.2 ERROR 7-28, 7-31 
41.3 ERROR 7-28 
41.4 ERROR 7-28 
41.5 ERROR 7-28 
50 service error 7-29 
51 ERROR Message 7-31 
52 ERROR 7-32 
57 SERVICE 7-33 
58 SERVICE fan failure 7-34 
A
Accessory Parts 8-33 
adjustmentleading edge registration 1-35 
advanced functions 3-33 
ASAP (Automated Support Access
Program) 1-12 
ASCII PJL Escape Sequence 3-19 
assemblies removal 6-15...

defect Ruler 7-67 
defect template 7-67 
developing station, drum 5-22 
DHHS laser safety 1-8 
Diagnostics B-28 
diagrams, timing 5-34
disassembly, fuser 6-47 
display language, changing 3-28, B-30 
distorted print 7-35, 7-42 
documentation, related 1-7, B-8 
DOS commandsserial 7-53 
DOS Utilities 3-42 
Drum cleaning station 5-18 
conditioning station 5-19 
developing station 5-22 
photosensitive 5-17
Rotation Check 7-50 
sensitivity 5-17 
transferring station 5-24 
writing station 5-20 
dtr polarity...

high voltagecontact assembly 6-68 
contact plate 6-62 
contactor removal 6-62 
contactor/paper guide removal 6-62 
High Voltage Power Supply
assembly 7-51 
checks 7-51 
removal 6-21 
troubleshooting 7-51 
high voltage system 5-2 
HP ASAP (Automated Support Access Program) 1-12 
HP AUDIO TIPS 1-13 
HP FIRST (Fax Information Retrieval
Support Technology) 1-12 
I
I/O buffering 3-15 
information 3-26 
image defect summary 7-35 
formation system 5-1, 5-16 
formation troubleshooting 7-49 
skew 7-35 
image skew...

lower cassetteassemblies removal 6-44 
assembly 5-4 
drive motor (M3) 5-10 
functional check 7-24 
installing 3-44 
paper loading 3-45 
pickup motor 7-24 
pickup motor removal 6-45 
sensor board removal 6-44
tray switches 5-9 
LPT1 3-31 
M
M1, main motor 5-10 
M2 functional test 7-23 
M2, paper feed motor 5-10 
m3 lower cassette drive motor 5-10 
lower cassette pickup motor 7-24 
M4, envelope feeder drive motor 5-10
M5, scanner motor 5-11 
machine status 5-2 
Macintosh 3-18 
main motor
(M1) 5-10...