HP LaserJet 4v/mv Service Manual - Page 75

Input/Output

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NOTE Input/Output Parallel Interface The Formatter PCA receives incoming data through its Bi-Tronics interface (IEEE 1284). The Bi-Tronics I/O provides high speed and two-way communication between the printer and the host, allowing the user to change printer settings and monitor printer status from the host computer. The "High Speed (Yes/No)" configuration item is user-selectable. The default setting, "Yes" allows the I/O to run at the higher speeds supported by most newer PCs. When set to "No," the parallel interface runs at the slower, but compatible mode for older PCs. The "Advanced Functions (On/Off)" configuration item is also user-selectable. The default setting, "On" allows for two-way parallel communications. The "Off" mode disables the advanced functionality. The Bi-Tronics I/O is compatible with the Centronics parallel interface standard. Refer to "Parallel Cable Pin Configuration" in Appendix B for parallel pin assignments. Modular I/O (MIO) The optional Modular I/O card can be installed in the slot provided on the Formatter PCA. It provides automatic I/O switching between multiple computers or networks connected to the printer. The LaserJet 4MV printer includes the J2552A HP JetDirect Multi-protocol Network Card with LocalTalk, DIN-8, and Ethernet/IEEE802.3 10Base-T, BNC. LocalTalk I/O The printer implements AppleTalk networking protocol through LocalTalk hardware. The LocalTalk network cable (HP P/N 92215N) is connected through the MIO card accessible from the printer rear panel. (See Appendix B for more cabling information.) CPU The Formatter PCA incorporates the Intel 80960CF microprocessor operating at 33.33 MHz. Functional 5 Overview Functional Overview 5-13

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Input/Output
Parallel Interface
The Formatter PCA receives incoming data through its Bi-Tronics interface
(IEEE 1284).
The Bi-Tronics I/O provides high speed and two-way
communication between the printer and the host, allowing the user to
change printer settings and monitor printer status from the host computer.
The “High Speed (Yes/No)” configuration item is user-selectable.
The
default setting, “Yes” allows the I/O to run at the higher speeds supported
by most newer PCs.
When set to “No,” the parallel interface runs at the
slower, but compatible mode for older PCs.
The “Advanced Functions
(On/Off)” configuration item is also user-selectable.
The default setting,
“On” allows for two-way parallel communications.
The “Off” mode disables
the advanced functionality.
The Bi-Tronics I/O is compatible with the
Centronics parallel interface standard.
NOTE
Refer to “Parallel Cable Pin Configuration” in Appendix B for parallel pin
assignments.
Modular I/O (MIO)
The optional Modular I/O card can be installed in the slot provided on the
Formatter PCA.
It provides automatic I/O switching between multiple
computers or networks connected to the printer.
The LaserJet 4MV printer
includes the J2552A HP JetDirect Multi-protocol Network Card with
LocalTalk, DIN-8, and Ethernet/IEEE802.3 10Base-T, BNC.
LocalTalk I/O
The printer implements AppleTalk networking protocol through LocalTalk
hardware.
The LocalTalk network cable (HP P/N 92215N) is connected
through the MIO card accessible from the printer rear panel.
(See
Appendix B for more cabling information.)
CPU
The Formatter PCA incorporates the Intel 80960CF microprocessor
operating at 33.33 MHz.
5
Functional
Overview
Functional Overview 5-13