Health Led; Media Tray Type Sensing; Table 1-2 Tray Switch Sensor Combinations - Tektronix PHASER 560 Service Manual

1
General Information

Health LED

Media tray type sensing

1-12 Phaser 560 Color Printer
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A health LED indicates the status of the image processor board. The health LED
is mounted on the image processor board and is viewable through a small hole
in the rear panel. Once the PostScript code is loaded into memory and the image
processor is initialized and running, the image processor blinks the LED at a
one-second rate.
Blinking (at a steady rate): The printer is operating normally. The LED
blinks irregularly during power-up self-diagnostics.
If a soft error occurs, the image processor board operates, but in a
reduced capacity. Soft failures include failure of expansion memory
SIMMs or any of the interface ports. When a soft error occurs, the
printer automatically prints a startup page listing the error.
On or Off : A hard error condition has occurred that would keep the
image processor board from operating.
The combinations of the three tray sensors "tell" the print engine what type of
paper tray is installed. The tray sensors are located on the left-side interior of
the paper tray slot. Sensor actuators are attached to the bottom end of the tray to
close the appropriate sensor. There are four tray types:
Letter (A-size) paper
Letter (A-size) transparency film
Metric Letter (A4-size) paper
Metric Letter (A4-size) transparency film
Legal-size paper

Table 1-2 Tray switch sensor combinations

Left switch Middle switch
Closed Open
Closed Closed
Open Open
Closed Open
Open Closed
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Right switch Tray type
Open Letter (A-size) paper
Open Letter (A-size) transparency film
Closed Metric Letter (A4-size) paper
Closed Metric Letter (A4-size) transparency film
Open Legal size paper