DOT
MATRIX
PRINTER
gemini-10X
USERS
MANUAL
(PRELIMINARY)
CON
TEN
T S
1.
Installation"
•••••••...•.••••.••.••.••••••••••••••
1
1-1
Open
Carton
Box
••••••••••••••••••••••••••••••••••
1
1-2
Names
of
Each
Part
•••••••••••••••••.•••••••••••••
2
1-3
Location
of
the
Printer
•.••••••••••.•••••••••••••
4
1-4
Remove
Packing
and
Fixing
Screws
for
Shipping
••••
5
1-5
Removing
and
Mounting
of
Tractor
Unit
••••••••••••
7
1-6
Mounting
of
Paper
Separator
and
Paper
Guide
••••••
9
1-7
Setting
Roll
Paper
Holder·······················
'10
1-8
Installation
of
Ink
Ribhon
••••••••••••••••••••••
·12
1-9
Inserting
Paper
•••••••••••••••••••••••••••••••••
'14
1-10
Adjusting
Gap
between
the
Print
Head
and
Platen
··19
2.
Operation·········································
·20
2-1
Operation
Items
··································20
2-2
Connection
of
the
Printer
with
the
Parallel
Interface
......................
21
2-3
Setting
of
DIP
Switches
..............
•
..........
·22
2-4
Printer
Initialization
..........................
·25
2-5
Paper-Out
Detector
..............................
·26
2-6
Self-Test
Print
Function
........................
·26
3.
Character
Set
....
•
................
•
..
•
....
•
....
•
...
27
3-1
Standard
ASCII
Character
&
International
Character
Set
••••••••••••••••
·28
3-2
Block
Graphic
&
Special
Character
Set
············30
3-3
Italic
ASCII
Character
Set
..........
•
..........
"31
3-4
Download
Character
Set
···························32
3-5
Bit
Image
Graphics
Mode
..........................
34
4.
Functional
Control
Codes
............................
36
4-1
Commands
Used
to
Control
Print
Style·············
36
4-2
Commands
Used
to
Control
Vertical
Position
of
the
Print
Head
•••••••••••••••••••••••••••
42
4-3
Commands
Used
to
Control
Horizontal
Position
of
the
Print
Head
........
•
....
•
........
•
....
47
4-4
Commands
Vsed
to
Control
Graphics
••••••••••••••••
49
4-5
Commands
Used
to
Download
Character
.••••••••••
"'50
4-6
Commands
Used
Macro
Instruction
••.••••••••••••
"'51
4-7
Other
Function
Codes
••••.•••••••••••••••••••••••
'52
5.
Maintenance'
•••••••••••••••••••••••••••••••••••••••
55
5-1
Cleaning
..
•••
..
•
..
•
..
••
....
••
..
••
........
••
..
•
..
•
55
5-2
Replacement
of
Parts
·····························56
6.
General
Specifications
•••••••••••••••••••••••••••••
59
6-1
Printer
Specifications
•••••••••••••••••••••••
····59
6-2
Form
Specifications
•••.••.•••••..••••••••••••••••
62
6-3
Ink
Ribbon
Specifications
························62
6-4
Parallel
Interface
Specifications················
63
6-5
Serial
Interface
Specifications
[Option]
·········66
Append
ix
••••••••••••••••.•.••.••••••••••••••••••••••••.
67
The
contents
of
this
manual
are
subject
to
change
without
notice.
G10XllZOOl
1 .
In
st
a
ll
a
ti
on
1-1
Open
Carton
Box
Af
t er ope
ni
ng t
he
carton
box
, pl
ease
confirm
that
t
he
f
ollowing
accessor
i
es
and consumab l
es
ar e
in
t
he
box
.
(
1)
Printe
r
(
6)
Holder
Shaft
(
2)
Prin
t er
Cover
(7)
I nk Ribbon
(3)
Pa
per Guide
(
8)
S
pare
Fu
se
(4)
Pa
per
Sepa
rato
r
(9)
User
' s Manual
(
5)
Roll
Paper
Holder
(0)
Wa
rr
a
nt
y
Ca
r d
Fig
.
1-
1
Packing
L
is
t
- 1-
1-2
Names
of
Each
Part
Printer
Fig.
1-2
Front
View
Fig.
1-3
Back View
-2-
r
Switch
Platen
Knob
DIP
Switch
2
Connector
for
Parallel
Interface
Port
Hole
for
Serial
Interface
(optional)
Ground
Terminal
Power Cord
Control
Logic
Board
Fig.
1-4
Internal
Construction
-3-
:
~
Platen
Knob
Power
Supply
Unit
1-3
Location
of
the
Printer
When
you
install
the
Gemini
printer,
the
following
points
should
be
observed.
(1)
Place
the
printer
horizontally.
(2)
Avoid
places
where
the
printer
is
exposed
to
direct
sunshine
or
close
to
a
heater,
or
heat
generating
applicances.
(3)
Do
not
operate
the
printer
under
circumstances
of
extreme
high
or
low
temperature,
or
of
strong
vibration.
(4)
Do
not
operate
the
printer
in
a
place
of
high
humidity
or
a
dusty
place
with
oil
or
iron
particles.
(5)
Provide
a
separate
power
supply
away from
applicances
or
noise
generating
motors.
(6)
Power
supply
voltage
shall
be
the
same
voltage
as
specified
on
the
identification
plate.
Extremely
high
or
low power
voltage
may
cause
printer
problems.
-4-
1-4
Remove
Packing
and
Fixing
Screws
for
Shipping
Printer
mechanism
is
secured
by
two
screws
on
the
bottom
of
the
printer
and
packing
material
is
also
placed
inside
the
printer
to
secure
the
print
head
and
platen
during
shipping.
Before
you
use
your
printer,
remove
packing
and
screws
with
the
following
procedures.
Please
keep
packing
and
screws,
if
necessary
for
further
printer
shipping.
(1)
Place
the
Gemini
printer
upside
down
on
a
soft
material
like
a foam
rubber
cushion.
(2)
Remove two
screws
with
screwdriver
as
illustrated
in
Fig.
1-5.
Printer
(Lower
Case)
Fig.
1-5
Removing
Fixing
Screws
for
Shipping
(3)
Return
the
printer
to
its
original
position.
(4)
Lift
the
printer
cover
upward,
and
remove
it
from
the
printer.
-5-
(5)
Remove
the
packing
material
from
inside
of
the
printer
as
shown
in
Fig.
1-6.
Platen
Jamb
Packing
for
Print
Head
Print
Head
Platen
Jamb
Fig.
1-6
Removing
Packing
-6-
1-5
Removing and Mounting
of
Tractor
Unit
The Gemini
tractor
unit
is
easy
to
remove
or
install.
During
shipment,
the
tractor
unit
is
mounted
on
the
printer.
However,
this
unit
is
only
necessary
for
Sprocket
paper.
When
other
papers
(Single
sheet,
Roll
paper)
are
used,
the
unit
should
be
removed.
1-5-1
Removing
of
Tractor
Unit
(1)
Turn
off
the
power
switch.(This
is
not
really
a
"requirement".)
(2)
Remove
the
printer
cover.
(3)
Identify
the
"snap
levers"
by
comparing
your
printer
with
the
Gemini
shown
in
Fig.
1-7.
(4)
Pull
both
"snap
levers"
forward
(the
one on
the
right
and
the
one on
the
left
of
the
tractor
unit),
and
at
the
same
time
•••
(5)
Rock
the
tractor
unit
up and
back,
about
a
half-inch.
The
tractor
unit
rests
On
two
"stoppers"
just
above
the
right
and
left
ends
of
the
platen.
This
step
in
removing
the
tractor
is
done
by
simply
rocking
the
unit
backwards,
after
you've
released
the
snap
levers
that
hold
it
in
place.
(6)
Now
lift
the
tractor
unit
toward
you,
up
and
forward
from
the
printer.
Snap
Lever
Tractor
Frame
Snap
Lever
Printer'
Fig.
1-7
Removal
of
Tractor
Unit
-7-
1-5-2
Mounting
of
Tractor
Unit
(1)
Insert
cut-out
parts
(shown
"A")
of
the
tractor
frame
left
and
right
to
the
stoppers
of
the
printer
as
shown
in
Fig.
1-8.
(2)
Push
the
tractor
unit
slightly
downward,
it
then
fits
in
properly
to
the
hooks
(shown
"B")
,
which
are
provided
at
th
e
end
of
the
snap
levers,
to
clamp
lever
shafts.
/
Tractor
U
nit
Clamp
Lever
Fig.
1-8
Mounting
Tractor
Unit
- 8-
1-6
Mounting
of
Paper
Separator
and
Paper
Guide
Paper
separator
and
paper
guide
for
smooth
paper
feed
To
insert
the
paper
se?arator
and
paper
guide,
insert
one
side
to
the
hole
of
printer,
then
gently
bend
back
the
other
protruding
end
until
it
slips
into
place.
Make
sure
you do
not
get
these
racks
in
upside
down.
Paper
Upper
Cas
Printer
Fig.
1-9
Mounting
of
Paper
Separator
&
Paper
Guide
-9-
Guide
1-7
Setting
Roll
Paper
Holder
(1)
Lift
the
printer
a
little
bit,
then
slide
in
the
roll
paper
holder
to
the
printer.
Insert
the
hooks
of
the
roll
paper
holder
to
the
holes
·which
are
provided
at
the
back
side
of
the
printer.
Fig.
1-10
Setting
Roll
Paper
Holder
(2)
Insert
roll
paper
onto
holder
shaft.
Pay
attention
to
winding
direction
of
the
roll
paper.
Roll
Holder
Shaft
<'~
/
.~
~
/~,
paper/~~l
Fig.
1-11
Setting
Holder
Shaft
-10-
(3)
Place
the
roll
paper
with
shaft
to
the
roll
paper
holder,
as
shown
in
Fig.
1-12.
Check
that
the
unwinding
direction
of
the
roll
paper
is
correct.
Roll
Paper
\
IHolder
Shaft
Fig.
1-12
Setting
Roll
Paper
to
Holder
-11-
1-8
Installation
of
Ink
Ribbon
(1)
Turn
the
power
off
and
remove
the
printer
cover.
(2)
Slide
the
print
head
gently
with
your
fingures
to
the
approximate
center
of
its
pathway.
(3)
Begin
by
setting
either
ribbon
spool
securely
on
a
ribbon
spool
axis.
Make
sure
you
have
the
spool
positioned
so
it
will
wind/unwind
as
shown
in
the
figures.
Place
the
spool
securely
on
the
axis,
so
that
the
"drive
pins"
engage
the
spool.
,Ribbon
Guide
Print
Head",
~
~--rs---1
6.
~
d
,
(~
____
{;;
, 'yeM ,,,".e,
Ribbon
Spool
Fig.
1-13
Pathway
of
Ink
Ribbon
(4)
Then
thread
the
ribbon,
taking
care
around
the
print
head.
As
shown
in
Fig.
1-14,
you
might
want
to
use
a
ball-point
pen
to
lightly
press
the
ribhon
guide
towards
the
platen.
while
inserting
the
ribbon
in
the
slot
between
the
print
head
and
the
ribbon
guide.
Fig.
1-14
shows
you
how
to
position
the
ribbon
to
avoid
misprints
or
the
ribbon
coming
off
during
printing.
Two
wrongs
don't
make a
right,
so
try
to
be
careful
when
setting
the
ribbon
near
the
print
head.
Print
Head
,Ribbon
Guide
Ink
Ribbon
Pri,\t
Head
'~
(Incorrect)
(
Incorrect)
Fig.
1-14
Insertion
of
Ink
Ribbon
into
Slot
between
Print
Head and Ribbon
Guide
-12-
Ribbon
Guide
~
(
Correct)
(5)
The
eyelet
grommet
(which
signals
Gemini
to
automatically
reverse
the
ribbon
direction)
should
be
placed
on
the
ribbon
spool
side
of
the
change-
over
lever,
as
shown
in
Fig.
1-15.
Slit
of
Changeover
Lever
~~
~,~,
"',
'"
"
Eyelet
Gromme>~'"
"<
'"
"
,.,~
Ribbon
Spool
""~"
'~
Fig.
1-15
Position
of
Eyelet
Grommet
(6)
Set
the
other
ribbon
spool
on
the
opposite
spool
axis,
making
sure
the
"drive
pins"
are
engaged.
(7)
When
the
ribbon
threading
has
been
accomplished,
turn
the
ink
ribbon
spools
by
hand,
maybe
four
or
five
rotations
of
the
spools.
This
verifies
that
everything
was
done
properly
and
that
the
ribbon
is
smoothly
fed.
(Note)
As
shown
in
Fig.
1-16,
you
can
turn
the
ribbon
over
and
use
the
other
side
when
it
starts
wearing
out.
A B
Fig.
1-16
Installation
of
Turned
Ink
Ribbon
-13-
1-9
Inserting
Paper
1-9-1
Inserting
Single
Sheet
Paper
(1)
Turn
the
power
off
and
remove
the
printer
cover.
(2)
Make
sure
the
release
lever
(on
the
left
side
of
the
printer)
is
set
in
the
"T"
position
(which
is
the
"open"
mode
for
inserting
the
paper;
you'll
"close"
it
to
the
"F"
mode
in
a moment).
(3)
Lift
up
the
paper
press,
as
shown
in
Fig.
1-17.
(4)
Insert
the
sheet
of
paper
from
the
back
side
of
the
platen,
between
the
paper
chute
and
the
platen
cover.
Push
the
paper
through
to
the
upper
front
side
of
the
platen.
Release
Lever\
/
/0,
\Y
:;;::;;0~
",e'A~
..
.
:~/
!
~/.
L ( ,
f,
fI'-~
,
,
..
'~
..
""'.;:.>.c?'.
'~.".<';.."
~'"
. . .
"1'
, .' j)
"
-',
-
..
~"
"
--,
'
.
Single
Sheet
Paper
>z::
Paper
Chute
Fig.
Single
Sheet
Paper
Set
(5)
Adjust
the
paper
horizontally
(right
and
left)
so
that
the
sheet
is
where
you
want
it.
Make
sure
the
area
you
are
going
to
print
on
the
sheet
is
within
the
margins
you
are
going
to
set
for
the
print-out.
(6)
Make
sure
the
paper
is
in
straight.
(7)
Position
the
sheet
of
paper
where
you
want
the
first
line
of
text
to
start
printing.
(8)
Push
the
release
lever
back
to
the
"closed"
position,
indicated
by
"F".
(9)
Return
the
paper
press
to
the
original
pOSition,
flush
against
the
paper.
Release
Lever:.
.~
Paper
pres\~~':/"
.".~,
~~~~,
~'"
rf::;f;~#-?/
Y
y::
~!~~
"~.
~~
l
~
""'
",~~,,,,~,,,,,::~.
,
'-./,~~)~
..
~,
.
")~
'-::::~~~I\'V
~,~,
~_--1~I\
_.....
~
J.",,';.?/
//~\
II
\\(
~~
"<'"
'~
("'
"~~/
././
.~;
"<
~~
Â¥~:iJ
I
....
'··~~~"1d~
''-...
::
/
~~
((~:/
I
,~'~/
'<;:
..
~;://
Fig.
1-18
Single
Sheet
Paper
Set
(10)
Replace
the
cover
and
turn
the
po,"er
"on".
-1:'-
1-9-2
Inserting
Roll
Paper
(1)
Turn
the
power
off
and remove
the
printer
cover.
(2)
Remove
the
tractor
unit,
if
you
have
not
already
done
so.
(3)
Following
the
procedures
described
in
sections
1-6
and
1-7,
install
the
paper
separator,
guide,
and
holder.
(4)
Pull
the
release
lever
(located
on
the
left
side
of
the
printer)
into
the
"open"
position.
As
with
single
sheet
paper,
the
"open"
position
is
indicated
by
the
letter
"T".
(S)
Lift
up
the
paper
press.
(6)
Pull
the
paper
separator
upright,
as
shown
in
Fig.
1-19.
The
paper
guide
should
remain
horizontal.
(7)
Insert
the
roll
paper,
as
shown
in
Fig.
1-19,
so
that
when
viewed
from
the
printer's
right
side,
the
paper
will
unroll
in
a
clockwise
direction.
Paper
Separator,
Release
Lever,
Paper
Press
\
Fig.
1-19
Setting
Roll
Paper
,Roll
Paper
Paper
Holder
(8)
As
shown
in
Fig.
1-20,
unroll
some
paper
and
pass
it
above
the
paper
guide,
and
underneath
the
up-ended
paper
separator.
(9)
Insert
the
roll
paper
into
the
paper
chute,
then
push
the
paper
through
so
that
it
goes
around
the
platen.
-15-
Fig.
1-20
Installing
Roll
Paper
(10)
When
the
paper
has
been
pushed
through
so
it's
above
the
paper
press,
push
the
press
back
so
it's
in
its
operational
position
(that
is,
flush
against
the
paper).
(11)
Adjust
the
paper,
if
necessary,
so
it
will
feed
through
straight;
then,
push
the
release
lever
back
to
the
"locked"
or
"closed"
position,
marked
with
the
letter
"F".
(12)
Lower
the
paper
separator,
as
shown
in
Fig.
1-21.
Fig.
1-21
Adjusting
Roll
Paper
(13)
Rotate
the
platen
knob
and
check
to
see
if
the
roll
paper
is
feeding
smoothly.
If
some
adjustment
is
needed,
pull
the
release
lever
forward
to
the
"open"
mode
again,
and
adjust
the
placement
of
the
paper
before
"closing!!
the
release
lever.
(14)
Set
the
print-start
position,
and
replace
the
cover.
-10-
1-9-3
Inserting
Sprocket
Paper
(1)
Tu:cn
the
power
of
f and remove
the
printer
cover.
(2)
Install
the
tractor
unit,
as
described
in
section
1-5-2.
(3)
Install
the
paper
separator
and
paper
guide,
as
described
in
section
1-6.
(4)
Pull
the
release
lever,
located
on
the
left
side
of
the
printer,
toward
the
"open"
position
(marked fiT").
(5)
Lift
up
the
paper
press.
(6)
Pull
the
paper
separator
upright,
as
shown
in
Fig.
1-22.
Paper
separator~
~I
Fig.
1-22
Installing
Sprocket
Paper
(7)
Place
the
stack
of
sprocket
paper
behind
the
printer.
aper
Guide
(8)
Pick
up
the
top
sheet
of
paper
and
feed
it
between
the
paper
chute
and
platen
cover,
from
the
back
side
of
the
platen.
(9)
Push
the
paper
down and
forward,
so
it
wraps
around
the
platen.
(10)
Return
the
paper
separator
to
its
original
position.
(11)
Open
the
tractor
covers,
atop
the
right-
and
left-sprocket
mechanism,
as
shown
in
Fig.
1-23.
(12)
Pull
the
paper
up,
past
the
sprocket
mechanism.
(13)
Flip
the
clamp
levers
forward
on
the
sprocket
mechanism;
adjust
each
mechanism
(right
and
left)
so
that
the
sprockets
(the
nubby
little
"teeth"
sticking
out
on
the
sprocket
wheel)
align
with
the
holes
on
the
paper.
(14)
Adjust
the
sprockets
so
they
are
lined
up
with
the
sprocket
holes.
-17-
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