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Replacement
1.
Replacing
the pattern
case
whole
unit
............
2.
Replacing
the main
P.C.B.
assembly
'....'.".......
3.
Replacing
the
power
supply board
.....'."'
4.
Replacing
the
encoder board
assembly
....'..."......
5.
Replacing
the
power
transformer
6.
Replacing
the
timing
belt
and
the
rotary
encoder
assembly
7.
Replacing
the
needle
selector solenoid
unit
and solenoid
itself
............
8.
Replacing
the
card
reader
.........
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REMARKS
Pay
attention to
the
following point to
avoid
creating
more
"faults".
1.
The power supply cord should be
removed
from
the wall
outletwhen
replacing
the
mechanical
parts and printed
circuit
boards, and when adjusting
the
mechanical
parts.
2.
When removing connectors take care
not
to
pull the
cords
themselves.
3.
The
screws
and nuts should
be
tightened properly.
4.
Do
not
lose
the
screws,
nuts
and
washers
and
do
not
leave
them
in
the
machine,
they
may
cause a
short circuit.
5.
Take care
not
to
damage
the
cords and
the printed
circuit
boards
with
heat when
soldering.
6. The
electronic
components
used
in this
machine
can
be
damaged
by
static
electricity.
Touch
a
point
known
to
be
earth before
handling
the printed
circuit
boards.
Handle
the
boards
by
their
edges,
do not touch the
components.
7.
When
carrying the printed
circuit
boards, pack
them in
an
electric conductor like
an
aluminum
foil
or antistatic
bag.
Never pack
in
polyethylene or
styrene.
8.
Check
the
connectors
in
addition
to
the
parts
repaired, and
then
check
the
machine is in
working
order.
9.
The
main
supply should
be
the
same
as
the rating
of
the
machine.
-2-
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