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Facit 4440 TWIST Service Instruction page 14

Video terminal

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7.2.1.1
Operating
instruction,
BURN
IN
TEST
I
7.2.1.2
Operating
instruction,
MANUEL
TEST
- - - - - - - - - - - - - - - - - - - - -
_ _
MODE
Remove
Jumper H4.
-
- -
- - - - - - - - - - - - - - - - - - -
This
mode
is
BURN
IN
TEST
MODE,
i.e.
auto
test
|
Remove
Jumper
W7
and
W4.
starting with:
In
this test
mode
it
is
possible to select
any
I
of
the burn
in
test
modes and
more,
like
spe-
RAM
TEST,
this test is
able
to point
out
a
fai-
C161
t@St
PTCTUPGS äS GGSCYIDGG
bel0W.
Ting
RAM.
'
NOTE:
THE
SPECIAL
I/0
PRINTER
CONNECTORS
USED
EAROM
TEST,
this test
calculates
the
EAROM's
|
IN
BURN
IN
TEST
MODE
MUST NOT HAVE THE
PIN'S
9
checksum.
AND
10 IN
THE
PRINTER
CONNECTOR
CONNECTED
AS
'HIS
WILL
INTERFERE WITH
THE KBD
COMMUNICATION.
PROM
TEST,
the
checksum
is
calculated
for
both
EPROM's.
'urn
on
the
terminal.
SYNC
TEST,
basic
test
to
verify
that
the
CRTC
"he
terminal
will
display:
is alive.
4440
TEST-MODE
I/O
HANDSHAKE
TEST,
this test
will
test
the
The
following test
modes
are
available in
the
RTS-CTS and
READY
lines.
first
version
of this test
program,
and
will
be
|
subjects
for
change see
Service
Bulletins
for
SERIAL DATA,
this test
will
send
and
receive
further
informations
.
data
on
all
three
data
lines (I/O,
PRINTER
and
KBD).
Active
keys
are
as
follows:
Make
a
test
connections
as showed
in the
figure
In the alphanumeric
keypad.
below.
1-2-3-4-5-6-7-8-9-O-a-e-NO
SCROLL
Turn
on
the
terminal,
this test is
running
un-
til
interrupted
by
power-off.
l
In the
editing
block
keypad:
ERASE
-
Home
- Tabulation
Backward
- Tabulation
Forward
-
Cursor
Up
-
Cursor
Down
In the Function
key
block:
1/o
Fo, F7,
Ps
PF1, PF2,
PF3
X22
-
'
laga
-qoni
|
-l¶Txo
I
-JíRTs
\~*
-J21RsAov---
-J~Ru>--
-JJcTs
-låmo
\"
PRINTER
X23
-ÄÅPR Txo
-JÄPR
Rxo:]
-JiíRsAov
ímioni
-W-ikao
Txo
-<\
-9-ikon
Rxo
-0
-Jäcrs
FIG
7.2
TEST CONNECTIONS
I

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