Bernina 1230 - Test Adaptor L-4200 Usage

Test
adaptor
L-4200
The
power
supply
for
electrical
parts
which
are
con-
nected
to
print
L-4200
and
the
main
motor
control
are
checked
with
the
aid of
the test
adaptor.
" When
all LEDs
A
to E ligth
up,
then
the power
supply
for:
-
the
step
motors
- the
logic
circuit
- the
sewing
light
is
correct.
Bobbin
winder
motor,
LED
E,
cannot
be
tested.
" If only
LED
B doesn't
light up,
then
the voltage
for the
logic
is too
high
(more
than
5,5
V).
*
If only
LED
C doesn't
light
up, then
voltage
for the
logic
is too
low
(less than
4,5
V).
*
When
the
motor
switch
is in
the
((on))
position,
the
electric
brake
is released,
the motor
receives
the
desired
value
and
will
run at
the
set
speed.
LED
F
for
the drive
signal
must
be lit.
Speed
regulation
is made
by turning
the potentiometer.
* When
the
motor
switch
is
placed
in
the ((off)
position
the
signal
returns
to zero,
and
the
electric
brake
should
engage.
The
motor
slows
down
to a stop.
LED
F must go out.
TEST
-ADAPTER
L 4200
r
30V
SCHRITTMOTOR
STEP MOTOR
r-Bl
C,5v
0
5V
LOGIC
Ri>4,5V
0
F
6V
O
NAEHLICHT
~1
SEWING
LIGHT
E30V 0
SPULERMOTOR
BOBBIN
WINDER
BERNINA
=
LAUFSIGNAL
DRIVE
SIGNAL
TOFF@0ON
Q
MOTOR
1230
13