Bernina 1230 - Test G; Lamp Holder and Sewing Light Test

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What
is
to
be
tested
What
to
adjust
Normal
condition
Lamp
holder
-
Mains
switch
on.
- Sewing
light
burns.
a)
Switch
on
sewing
light.
El
L2
.-- 4
2-pin
green
Important:
If the
sewing
light
doesn't
function
and
both
bulbs
are
intact,
then
the
connections
from
L 1,
L2
and
S
to
the
plug
can
be
checked
with
the
circuit
tester
or
ohmmeter.
The
switch
S can
be
tested
by
putting
the
test
probes
in
the
plug
openings,
and
by
switching
on
and
off
there
must
be
continuity
and
blockage
in
the
circuit.
To
be
sure,
the
same
test
must
be
made
with
the
2-pin
green
plug.
L1
and
L2
can
be
testes
for
continuity
on
the
plug
openings.
Faulty
parts
must
be
exchanged.
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