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...

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...

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...

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)...

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...

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...

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...

7-D  LaserJet 5 Error Map