User Guide
Service menu (service PIN codes)
Authorized HP service technicians can use this menu to gain access to printer settings that are
reserved for service personnel. The service menu is protected by use of a personal identification
number (PIN). When you select SERVICE from the list of menus, you are prompted to type an eight-
digit PIN code.
NOTE The printer automatically exits the service menu after about one minute if no menu
items are selected or changed.
Use the PIN codes provided in the table Table 7-5 Service PIN codes
Table 7-5 Service PIN codes
Printer model PIN code
HP LaserJet 4200 Series printer 11420002
HP LaserJet 4250 Series printer 09425004
HP LaserJet 4300 Series printer 11430002
HP LaserJet 4350 Series printer 09435004
1
Press
(S
ELECT
button) or the M
ENU
button to open the menus.
2
Use
(U
P
A
RROW
button) or (D
OWN
A
RROW
button) to scroll to SERVICE, and then press .
3
Press
or until the first digit of the PIN code appears. Press to save that digit. Repeat this
selection procedure until you have typed the entire eight-digit PIN code. You can use
(B
ACK
A
RROW
button) to return to a PIN digit. When the last digit is saved, the service submenu appears
on the control-panel display.
4
Use
or to scroll to the service-menu item that you want, and then press .
■ Clear event log. Select this item to clear (reset to zero) the internal event log.
■ Total page count. Select this item to set the total number of pages that have been printed to-
date. Typically this is only required when a new formatter is installed.
■ Maintenance count. Select this item to set the number of pages that have been printed since
the last maintenance kit was installed or the total number of pages that have been printed on this
printer if a maintenance kit has not yet been installed (during the first 200,000 pages).
■ Maintenance interval. Select this item to specify the number of pages that can be printed before
a maintenance-kit-required message appears on the control-panel display to indicate that a
maintenance kit is required.
■ Serial number. Select this item to update the serial number if you replace the formatter.
■ Service ID. Select this item to specify the date when the printer was first used, rather than the
date that a replacement formatter is installed. See
Restoring the Service ID.
■ Cold reset. Select this item to reset the default paper size when you replace the formatter or
restore factory settings (see
Resets submenu). When you replace a formatter or restore factory
settings in a country/region that uses A4 as the standard paper size, use this item to reset the
default paper size to A4 (see
Cold reset). Letter and A4 are the only cold-reset values available.
Control-panel menus 323