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5-18 Functional Information
Disk
The disk accessory is mounted on the rear of the Formatter PCA. The
optional greater than 1 GB EIO-based hard drive is used for creating
multiple original prints (mopies) and storing forms, fonts, and
signatures.
Local Talk I/O
The printer implements AppleTalk networking protocol through
LocalTalk hardware. The LocalTalk network cable (HP P/N 92215N) is
connected through the EIO card. The LocalTalk hardware is an
optional feature for the HP LaserJet 4000, 4000 T, and 4050 series
printers. The LocalTalk hardware is bundled with the HP LaserJet
4000 N/TN printers.
CPU
The HP LaserJet 4000 series printer’s Formatter PCA incorporates a
100MHz RISC processor. The HP LaserJet 4050 series printer’s
Formatter PCA incorporates a 133MHz RISC processor.
Printer Memory
Note If the printer encounters difficulty managing available memory, a
clearable warning message will be displayed on the Control Panel.
Some printer messages are affected by the Auto Continue and
Clearable Warning settings from the Configuration Menu in the printer’s
Control Panel. If
CLEARABLE WARNING=JOB
is set on the Control Panel,
warning messages display on the Control Panel until the end of the job
from which they were generated. If
CLEARABLE WARNING=ON
is set,
warning messages display on the Control Panel until [Go] is pressed.
If an error occurs that prevents printing and
AUTO CONTINUE=ON
is set,
the printer goes offline for 10 seconds before it returns online. If
AUTO
CONTINUE=OFF
is set, the message displays until [Go] is pressed.
Read Only Memory (ROM)
Besides storing microprocessor control programs, the ROM stores
dot patterns of internal character sets (fonts).