Functional Overview
Formatter System
Control Panel
LaserJet 4L/4ML
Status LED Lights: The Formatter uses four lights to communicate
printer status to the user. Light from the LEDs is transmitted
through a single piece Light Pipe Assembly, mounted on the inside
of the printer cover. Refer to “Using the Control Panel,” in Chapter 3,
and to “Printer Error Troubleshooting” in Chapter 7, for more
information on the lights.
Front Panel Button: The Formatter PCA includes a microswitch
which is activated by the front panel button through a switch
actuator which mounts on the surface of the PCA. The single
button is used for such functions as self test, reset and displaying
error codes. Refer to “Using the Control Panel,” in Chapter 3 for
more information on the front panel button.
LaserJet 4P/4MP
The Formatter PCA on the LaserJet 4P/4MP sends and receives
printer status and command data via a Control Panel PCA, which
consists of an LCD display window and an 8-key keypad.
LCD Display Window: The Formatter uses a backlit 16-character
LCD display window in conjunction with three lights to
communicate printer status to the user. Display window messages
can be configured in any of several languages.
8-Key Keypad: The eight keys on the keypad are used for a variety
of functions, such as switching online/offline, configuring the
printer, initiating self tests, form feeds, or resets, and turning
EconoMode on and off. A keyboard overlay is available in any of
several different languages (see Chapter 8 for part numbers).
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