If A Problem Occurs
Once you
have
properly installed your terminal
and
matched itsoperating
values
with
those
of
your
computer
and
printer,
it
should give you
years
of
trouble-free service. However,
if
it
does
not oper-
ate
properly, check
the
followinglistbefore calling
your dealer
or
distributor.
Troubleshooting Checklist
If
the
terminal doesn't
operate
at
all, check
these
items:
•
Are
all cables firmly plugged in
at
both
ends? (You'd
be
surprised how often this is
the problem!)
• Are all system units turned on?
• Is the terminal locked up? Turn it off and
back on.
If
the
terminal doesn't communicate with
the
host
or modem:
• Are you in the proper operatinQ mode? The
correct communication
mode? Check the
status line.
•
Is
your computer operating system booted
up?
• Do the terminal and computer communica-
tion formats match?
Check
the set-up
menu of the port selected as the host port
for the terminal communication format.
• Is the interface between the terminal and
the computer
or
modem correctly wired?
Check the computer port pin signals (see
Chapter 1 pin assignments).
• Is your modem operating correctly? Check
its instructions; if necessary, contact the
manufacturer for assistance.
If
the terminal doesn't communicate with
the
printer
or
other peripheral:
• Is the interface cable firmly plugged in at
both ends?
• Is your application program correctly con-
figured for your peripheral?
• Are the communication, editing
key,
print
key operation and print modes set so the
terminal receives the print key codes and
printing commands?
• Does the serial port communication format
match that of your serial peripheral?
• Is the interface between the terminal and
the peripheral correctly wired? Check serial
and parallel port pin signals (see Chapter
1).
USER'S GUIDE
4-1
Chapter 4
TROUBLESHOOTING
If
the
screen
display is faint or
the
cursor
does
not
appear
correctly:
• Have you adjusted the screen brightness?
• What cursor style is specified in set up?
I CAUTION I
Do not plug or unplug the keyboard
cable while the terminal is turned on.
A power surge may result, which could
severely damage the terminal.
• Is the keyboard locked? Reset the terminal
I
from setup
or
turn power off, then on again.
Running Self Test
You
can
verify proper operation
of
the
terminal
video display circuitby running
the
self test.
NOTE: Running se
If
test erases anydata on
the screen.
1.
Enter set up, go to the local mode, then
exit
set
up.
2.
In
sequence, press Esc, the spacebar, and any
character. (The
same
sequence
can
be
sent
by
tre
host.)
3.
Verify
that the screen
is
filled
with
tre
char-
acter chosen
in step 2.
4.
To
clear the test
from
the screen, press
ICtr11
~
Monitor Mode
A terminal usually displays printable (alphanu-
meric) characters
such
as
letters, numbers,
and
punctuation symbols on
the
screen.
But
it
also
receives
many
other characters (called
codes)
that
are
commands. They do notappear
on
the
screen;
instead,
the
terminal interprets
and
responds
to
them. (For example, when
the
terminal receives
the
command
etrl
Z,
it
clears
the
screen.)
When monitor mode is enabled,
the
terminal
no
longer
responds
to commands from
the
computer
orkeyboard.
It
displays all
data
(printable charac-
ters
and
command
codes)
on
the
screen.
Programmers
use
monitor
mode
to display
the
contents
of
aprogram on
the
screen,
or
to find out
what
code
an
editing key
sends.
To toggle monitormode on
and
off,
press
IShift I I
Ctrll
rn
(numeric keypad one).
TROUBLESHOOTING
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