HP Laserjet 4 Manual

7
Troubleshooting
Pre-Troubleshooting Procedures  
Preliminary Operating Checks  
Prior to troubleshooting a specific printer problem, you should
ensure that:
•The printer is being maintained on a regular basis as
described in Chapter 4.
•The customer is using acceptable media as specified in the
User’s Manual.
•The printer is installed on a solid, level surface.
•The line voltage does not vary more than 10% from the
nominal rated value as specified on the Power Rating Label.
•The operating environment...

Printer Message Troubleshooting      
Printer Message Summary Table  
Table 7-1  is a list of all status, attendance, error, and service
messages affecting the printers. The table also identifies the
action required to correct the situation identified by the message.
When the action requires removal and replacement of an
assembly or PCA, refer to the applicable section of Chapter 6 for
instructions. For general location of components, refer to
Troubleshooting Aids at the end of this chapter.
Message...

Message Symptoms and Recommendations
07 RESET
RESETTING [xxx]Returns all printer settings to Printing Menu settings, and
clears buffered pages, temporary soft fonts, and macros.
Wait for the printer to display the 00 READY message. See
the Reset Menu section in Chapter 3 for more details.
08 NVRAM_INITPrinter is initializing non-volatile RAM. This allows other
personalities to access non-volatile RAM.
08 COLD RESET
RESTORING FACTORY
SETTINGSReturns both Configuration and Printing Menu selections to
the...

Message Symptoms and Recommendations
18 AUX IO INITThis message is displayed when the MIO (AUX IO) card is
in the process of initializing. During initialization the MIO is
not active, but since the printer supports I/O switching, the
printer remains on line and this becomes a status message.
Display clears automatically (this may take up to a minute,
depending upon the card).
18 AUX IO NT RDYThe MIO (AUX IO) card is not ready. See the user’s manual
for the MIO card. The serial and Bi-Tronics parallel...

Message Symptoms and Recommendations
22 ERROR
22 SERIAL I/O ERROR
22 PARALLEL I/O
ERROR
22 HP MIO ERRORFor serial/Bi-Tronics parallel configuration, the computer
and printer are not communicating because of improper
signal protocols. This is an I/O buffer overrun error.
Parallel configuration: may mean a loose cable connection.
Serial configuration: wrong pacing option may be selected.
(If you are using an RS232 serial connection, the HP
LaserJet printer uses XON/XOFF and DTR signal protocols
rather than...

NoteRefer to the “Product Family Compatibility
Matrix” in Chapter 1, or for the LaserJet 5,
Appendix B to verify correct memory for the
printer.
Message Symptoms and Recommendations
53.XY.ZZ ERRORAn error occurred during configuration and validation of
SIMM memory:
X  Hardware Type:
  0:ROM
  1:RAM
    2:Flash
Y  Hardware Device:
  0: Internal Memory
  1: SIMM Slot 1
  2: SIMM Slot 2
  3: SIMM Slot 3
  4: SIMM Slot 4
ZZ  Error Number:
  0: Unsupported Memory
  1: Unrecognized Memory
  2: Unsupported...

Message Symptoms and Recommendations
55 ERROR
55 PRINTER ERRORIndicates a communications problem between the DC
Controller PCA and the Formatter PCA. Pressing
[Continue]* clears the error and resumes printing.
Perform the Test Print operation to verify DC Controller
functionality. If the message persists, check for any cable
damage, and check the DC voltages, or replace the DC
Controller.
57 SERVICE
57 MOTOR FAILURE
57.1 SERVICE This message indicates that a main motor failure occurred.
Power cycle the...

Message Symptoms and Recommendations
64 SERVICE
64 PRINTER ERROR
65 SERVICE
67 SERVICEThe printer identified an internal service error. If this error
appears, turn the printer OFF, and then back ON. If the
problem persists, replace the Formatter PCA.
68 ERROR
68 NVRAM ERRORThe printer detected an error in the nonvolatile memory
(NVRAM). Press [Continue]*, then check your Control Panel
settings. If the problem persists, replace the Formatter PCA. 
68 SERVICE
68 NVRAM FULLThe printer’s nonvolatile memory...

Message Symptoms and Recommendations
FR REMOVE CARTAn accessory cartridge was installed while the printer was
in an error state. To clear this message, remove the
cartridge, clear the pending error condition, then install the
cartridge.
ME FEED 
[envelope size]
MANUALLY FEED
[envelope size]This message is displayed when there is a request for a
manually fed envelope. envelope size may be: COM10,
MONARCH, DL, C5, B5, or ENVELOPE. Insert the appropriate
envelope size into the MP tray (Tray 1), and press...

Clearable Warnings   
 A clearable warning indicates a transient condition in the
printer. The printer continues on line while the message is
displayed in place of 00 READY. A clearable warning appears each
time the printer alters resolution or page protection (this causes
reconfiguration of memory), or aborts a job due to an invalid or
uninstalled personality, or insufficient memory. Clear the
message by pressing [Shift] + [Continue] (or Go for the LaserJet 5).
7-10 Troubleshooting