Controls And Indicators; Self-Test Procedures - Digital Equipment LA50 Technical Manual

Table 3-1 Controls and Indicators
Control/Indicator
READY indicator
FAULT indicator
POWER indicator
READY switch
LINE FEED switch
FORM FEED switch
Paper bail
Paper thickness lever
Paper release lever
Platen knob
Table 3-2 Self-Test Procedures
Self-Test
Internal
(runs automatically
at powerup)
Carriage motion
Print
Loop back
Function
The green READY indicator indicates the printer's operating
state. It is on when the printer is ready to print or is printing. If it is
off, the printer is not ready and will not start.
The red FAULT indicator blinks when the printer detects an
electronic fault. It stays on when the printer is out of paper.
The green POWER indicator is on when you apply power to the
printer.
The READY switch controls the printer's operating state.
Pressing the switch puts the printer in either the ready or not
ready state.
In
the ready state the READY indicator is on.
Pressing LINE FEED advances the paper one line.
Pressing FORM FEED advances the paper one full sheet.
The paper bail holds the paper against the platen. Red etch marks
on the bail help you position paper on the platen and locate the
horizontal printing position.
The paper thickness lever adjusts the printhead position to allow
for different printing form thickness. Keep the lever close to the
platen for normal printing. Move the lever away from the platen
for thicker sheets and multicopy forms.
The paper release lever controls paper holding tension. In the
forward position, paper is held tightly against the platen. In the
backward position, the paper is free for positioning or removal.
The platen knob allows manual control of the platen for paper
insertion, and for changing the paper's vertical position.
Checkout
Checks logic and memory
Checks carriage motor and drive circuits
Checks line feed motor, carriage motor,
printhead and associated circuits. Does
not test communication lines
Checks same functions as print self-test
plus the EIA transmit and receive lines
3-2