CPU
The HP Color LaserJet 5500 printer formatter incorporates a 400-MHz RISC processor and
the HP Color LaserJet 5550 printer formatter incorporates a 533-MHz RISC processor.
Printer memory
If the printer encounters difficulty managing available memory, a clearable warning message
will appear on the control panel.
Some printer messages are affected by the auto-continue and clearable warning settings
from the Configure Device menu, under System Setup. If CLEARABLE WARNING = JOB is
set on the control panel, warning messages appear on the control panel until the end of the
job from which they were generated. If CLEARABLE WARNING = ON is set, warning
messages appear on the control panel until
is pressed. If an error occurs that prevents
printing and AUTO CONTINUE = OFF is set, the message appears until
is pressed.
Read-only memory
Besides storing microprocessor control programs, the read-only memory (ROM) stores dot
patterns of internal character sets (fonts).
Random-access memory
The random-access memory (RAM) contains the page, I/O buffers, and the font storage
area. It stores printing and font information received from the host system, and can also
serve to temporarily store a full page of print-image data before the data is sent to the print
engine. Memory capacity can be increased by adding DIMMs to the formatter. Note that
adding memory (DIMMs) might also increase the print speed for complex graphics.
Firmware DIMM (HP Color LaserJet 5500 models)
To upgrade printer firmware, locate and use the latest firmware at http://www.hp.com/
support/clj5500.com or http://www.hp.com/support/clj5550.com.
Firmware compact flash (HP Color LaserJet 5550 models)
To upgrade printer firmware, locate and use the latest firmware at http://www.hp.com/
support/clj5500.com or http://www.hp.com/support/clj5550.com.
Nonvolatile memory
The printer uses nonvolatile memory (NVRAM) to store I/O and information about the print
environment’s configuration. The contents of NVRAM are retained when the printer is turned
off or disconnected.
142 Chapter 5 Theory of operation ENWW
To Next Page
Loading...