I/O Boards; Network Card; Table 5-1 I/O Board Functions - Tektronix Phaser 380 Service Manual

I/O boards

The three I/O boards contain the most of the printers sensors and solenoids.
An internal data bus, called the I
board. Through this single bus, the main board can "poll" the I/O boards for the
state of the printer's sensors as well as actuate the printer's solenoids. This data
bus greatly simplifies the wiring that would otherwise be required for
monitoring many sensors and actuating solenoids.
The following table details what functions are related to each I/O board:
Table 5-1. I/O board functions
I/O board 1 (left side of printer)
Head tilt solenoid
Head tilt home sensor
X-axis home sensor
Media width home sensor
Drum temperature sensor
Media width sensor
Paper pick electric clutch
Upper feed roller electric
clutch
Lower feed roller electric
clutch
Maintenance tray cam
electric clutch
Transfix gear position sensor
Drum home position sensor
Drum encoder sensor
Left maintenance tray sensor

Network card

A rear panel slot contains one PhaserShare Network Card. One card provides an
RS-232C serial port and a LocalTalk port. A second, alternative card offers an
Ethernet port which includes standard support for EtherTalk, TCP/IP and
Novell NetWare. A third card provides a Token Ring interface supporting Novel
NetWare, TokenTalk, and TCP/IP.
2
C bus, connects all I/O boards to the main
I/O board 2 (lower-right side of
printer)
Maintenance tray blade
position sensor
Cap/wipe/purge home sensor
Right maintenance tray
sensor
Printhead lock sensor
Paper tray empty sensor
Handfeed/paper pick sensor
Tray type sensor
Air valve solenoid
Theory of Operation
I/O board 3 (upper-right side of
printer)
Paper exit sensor
Preheat exit sensor
Front cover switch
Exit cover switch
Transfix cam solenoid
Ink-load cover sensor
Ink-low sensor
Ink-out sensor
Paper Preheater
temperature sensor
Front panel
Transfix cam solenoid
Service Manual 5-5
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