HP 4 Plus Manual

							Removing the High Voltage Contact Assembly
and Feed Guide Assembly
NoteThe following procedures are difficult and the
components are damaged easily.  The tolerances
between the parts are close and several attempts
may be necessary before the procedure is
complete.
1Perform all the steps of “Accessing the High Voltage Contact
Plate/Feed Guide Assembly” in the order given.
2Press the tab shown in Figure 6-56 to release the gear cover.
3Release the (5) latches that hold the Contact Plate in place
(see Figure 6-56).  Set the Contact Plate on the latch slots.
4Free the Left Toner Cartridge Guide Assembly from its
retainers.
5Lift the Contactor Plate and the Toner Cartridge Guide
Assembly out of the printer, Toner Cartridge Guide Assembly
first.
Figure 6-56 High Voltage Contact and Feed Guide Assembly
Latches
6-67 Removal and Replacement 
						

							Replacing the High Voltage Contact
Assembly/Feed Guide Assembly   
The Toner Cartridge Guide Plate and the High Voltage Contact
Assembly/Feed Guide Assembly must be installed together.
Allow plenty of time to perform this procedure because several
iterations of the process may be necessary.  
1Set the contact assembly over its mounting holes.
2Slide the Toner Cartridge Guide Plate into position on a
diagonal line (see Figure 6-57).
3Working the two parts together, lift the rear of the HVCP to
provide enough clearance to install the Guide Plate.
4When the Guide Plate is in position, press it into place on the
sheet metal.
5Press the HVCP into its mounting slots.
6Install the Laser Shutter Pivot Pin and test the Laser Shutter
for free operation.
7Replace the gear cover (see Figure 6-56).
Figure 6-57 Orientation of HVCP and Left Guide Plate
6-68 Removal and Replacement 
						

							Interconnect PCA Removal 
The Interconnect PCA is a connector board that connects the
Power Supply and the DC Controller with the the Fuser
Assembly. The Fuser Assembly connects directly into the
Interconnect PCA. The Power Supply and the DC Controller have
wiring harnesses that connect them to the Interconnect PCA.
NoteRe-assembly of the the Interconnect PCA 
requires
a small tie-wrap. Be sure to have a tie-wrap
available before beginning the disassembly.
Remove the interconnect as follows:
1Remove the Formatter Cage, the Power Supply, the Fuser
Assembly, the High Voltage Power Supply, and the Rear Door.
2Remove the (1) screw from the right-side PC tray Rail
Cover (see Figure 6-58, callout  1).
3Release the latch (see Figure 6-58, callout  2), slide the Rail
Cover to the rear of the printer and remove the cover.
(continued on next page)
Figure 6-58 Right Side PC tray Rail Cover (printer on right side)
6-69 Removal and Replacement 
						

							NoteAccess the Interconnect PCA Housing by laying
the printer on the rear of the printer chassis.  
4Disconnect the Interconnect Cable connector from the DC
Controller (J210 on LJ4, J213 on LJ4+/5). Remove the cable
from its retainer.
5Release the bottom or rear-most latch (see Figure 6-59),
callout 1) holding the arm of the Interconnect PCA housing to
the sheet metal.
6Rotate the bottom (rear) of the PCA housing up (toward the
front) to release the housing from the printer.
(continued on next page)
Figure 6-59 Interconnect PCA latches and AC Connector
Mounting Pins
6-70 Removal and Replacement 
						

							NoteThe AC Connector has polarity. Note the
orientation of the AC Connector before removing
it. This is 
required in order to install the
connector with the same polarity during assembly
(see Figure 6-60). 
7Release the AC Connector from the sheet metal with
needle-nose pliers.   Service Hint: Use a 5mm nut driver to
press the AC Connector retaining pins from the sheet metal. 
Figure 6-60 Correct Orientation of AC Connector (Notch at Upper Left)
6-71 Removal and Replacement 
						

							6-72 Removal and Replacement 
						

							7
LaserJet 5 Error Map
The LaserJet 5/5M/5N printer has error messages that are
similar to the LaserJet 4/4M/4+/4M+.  Use the following table to
look up the LJ5 error and take the recommended action.  If the
recommendation is to see another error, for example See 00
POWERS\bVE , look up the recommendation for that error in the
Printer Message Troubleshooting section (Tables 7-1 and 7-2).
Note The LaserJet 5 printer’s 
Go  key replaces both the
Online and   Continue keys previously used to
resolve some of the temporary errors in the
LaserJet 4 and 4 Plus printers.
Note For any LaserJet 5 error message preceded with a
number from 20 through 81, look up the
equivalently-numbered message in Table 7-1 and
proceed as directed.
Message on LJ 5/5M/5N
Recommendations
CLE\bR\fNG MEMORY See 07 RESET
CLOSE PR\fNTER COVER See 12 PR\fNTER OPEN
CONT\fNUOUS TEST, PRESS JOB C\bNC\NEL
KEY See
 04 SELF TEST
D\bT\b RECE\fVED The received data is waiting for a form
feed. (Takes the place of the  Form Feed
indicator on the LJ4.)
ENG\fNE TEST See 15 ENG\fNE TEST
F\bCTORY DEF\bULTS BE\fNG RESTORED\N See 09 MENU RESET
\fNCOMP\bT\fBLE ENVELOPE FEEDER
\fNST\bLLED Indicates that an envelope feeder has
been installed that is not compatible with
the LJ5. Press 
 GO to clear the error.  The
feeder will not appear in any control
panel or PJL messages.
LaserJet 5 Error Map  7-A 
						

							Message on LJ 5/5M/5NRecommendations
\fNCOMP\bT\fBLE TR\bY 3 \fNST\bLLED Indicates that a lower cassette has been
installed that is not compatible with the
LJ5. Press  GO to clear the error.  The
tray will not appear in any control panel
or PJL messages.
\fN\fT\f\bL\fZ\fNG (powerup only) See 05 SELF TEST 
\fNST\bLL TONER C\bRTR\fDGE See 14 EP C\bRT
\fNST\bLL TR\bY 2 See PC \fNST\bLL
\fNSUFF\fC\fENT MEMORY, JOB CLE\N\bRED See W3 JOB \bBORTED
\fNSUFF\fC\fENT MEMORY, PR\fNT\fNG \N\bT
300 DP\f See W4/7 JOB 300/[page protect size]
M\bNU\bLLY FEED [envelope size] See ME FEED [envelope size]
M\bNU\bLLY FEED [paper size] See MF FEED [paper size]
MEMORY LOW, P\bGE S\fMPL\fF\fED See W1 \fM\bGE \bD\bPT
MEMORY SETT\fNGS CH\bNGED See WM MEM CNF\fG N/\b or
WM CHK MEM CNF\fG
OFFL\fNE See 00 OFFL\fNE
[personality] MEMORY FULL, STO\NRED
D\bT\b LOST See
  WM [Personality] MEM FULL
PLE\bSE W\b\fT This message is displayed whenever the
device is in the process of flushing the
pipeline so it can go offline or into the
menus.  (Takes the place of the flashing
Online indicator.)
POWERS\bVE ON See 00 POWERS\bVE
PR\fNT\fNG CONF\fGUR\bT\fON P\bGE See 05 SELF TEST /
06 PR\fNT\fNG TEST
PR\fNT\fNG DEMO P\bGE See 06 DEMO P\bGE
PR\fNT\fNG FL\bSH P\bGE This message is displayed while a flash
file system page is being formatted and
printed.  Upon successful completion, the
device returns to an online and ready
state.
PR\fNT\fNG FONT L\fST See 06 TYPEF\bCE L\fST
PROCESS\fNG JOB This message is displayed whenever the
device is actively processing a user’s job.
(Takes the place of the flashing Ready
indicator.)
RE\bDY See 00 RE\bDY
REMOVE DUPLEX J\bM See 13 DUPLEX J\bM
7-B LaserJet 5 Error Map 
						

							Message on LJ 5/5M/5NRecommendations
REMOVE P\bPER J\bM See 13 P\bPER J\bM
REQUESTED L\bNGU\bGE NOT \bV\b\fL\bBLE See W2 \fNV\bL\fD PERS
RESETT\fNG \bCT\fVE \f/O See 07 RESET
RESETT\fNG \bLL \f/O See 07 RESET
RESTOR\fNG F\bCTORY SETT\fNGS See 08 COLD RESET
TONER LOW See 16 TONER LOW
TR\bY 2/3 EMPTY Indicates Tray 2 or 3 has run out of paper
and has not been selected as the current
job’s paper source.  If the problem
persists, check for a binding sensor flag
or replace the appropriate sensor.
TR\bY x LO\bD [paper or envelope size] See xx LO\bD [paper or envelope size]
W\bRM\fNG UP See 02 W\bRM\fNG UP
x LO\bD [envelope size]
x=Tray 1 or Envelope Feeder See
 xx LO\bD [paper or envelope
size]
LaserJet 5 Error Map  7-C 
						

							7-D  LaserJet 5 Error Map