Bernina 1230 - Service Operation Test Procedure; Starting and Ending Service Tests

LDanger
high
level
voltage!
Mains
voltage
(see
print
L-4200)
Circuits
on
the
power
print
L-4200,
the
main
motor
and
the
cord
drum
operate
at dangerous
voltages.
As some
capacitors
discharge
approx.
30 seconds
after
pulling
out the
mains
plug,
you
should
wait
this
long
before
touching
print
L-4200.
Test-programm
model
1230
(service
operation)
1.
Test-programme
start
-
Remove
belt
cover
(service
instructions
model
1130,
section
6).
-
Set
service
switch
on the
S-print
into
service
position
(refer
to Fig.
S-1
230,
page
10).
- Switch-on
sewing
machine/D.C.
mains
adaptor
unit.
The
sewing
machine
is now
in service
programme
no.
6 (step
motors),
move
to
and from
with
an
acustical
noise.
- Push clear button (min. 2 sec.).
- Mount
service
panel.
The
sewing
machine
is
now
in the
initial
state
of
the
service
operation.
The
individual
test
programmes
1 to
6 can
be
selected
from
this state.
The
initial
state
can always
be
selected
by
depressing
the
clear
button.
The
following
sensor
signals
can
now
be checked:
-
Position
indicator/P-print
(test 5
model
1130).
-
Foot
control
digital
and analog
(new).
-
Drive
signal
(partially
covered
in test
1,
test
adaptor
model
1130).
-
Ret button
(new).
- Adjust
buttonholer
potentiometer
(partially
section
42 model 1130).
Termination
of
the test-programme
-
Switch
off
the sewing
machine/D.C.
mains
Attention:
adapter.
When changeing
from normal
operation - Service
-
Bring
the service
switch
on the
S-print
into
the
operation
- normal
operation.
normal
position.
- Switch
off the
machine/mains
adapter.
The sewing
machine
can
now be
operated
-
Bring the
service
switch into
the desired
position.
normally.
- Switch
on the
machine/mains
adapter.
1230
17