User Guide

Flash
Optional flash is available in 4 MB flash memory DIMMs for storing forms, fonts, and signatures.
Hard disk
The hard disk is mounted in an EIO slot on the formatter. The hard disk is used to create multiple
original prints (mopies) and store forms, fonts, and signatures.
CPU
The HP LaserJet 4730mfp formatter incorporates a 533 MHz RISC processor.
FIH (foreign interface harness)
The FIH allows connection to third-party devices, such as copy counters and biometric security
devices.
MFP memory
If the MFP encounters difficulty managing available memory, a clearable warning message will
appear on the product control panel.
Some MFP 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
product control panel, warning messages appear on the control panel display 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 Autocontinue = Off
is set, the message appears until Ignore is touched.
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.
DIMM slots
The DIMM slots can be used to add memory, fonts, or firmware upgrades.
Flash memory
To upgrade MFP firmware, upload a new firmware image to the MFP.
148 Chapter 5 Theory of operation ENWW