Brother International 1800C Service Manual - Page 40

Disassembly/reassembly

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4.1 DISASSEMBLY/REASSEMBLY ■ Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work. (1) Unplug the power cord from the power outlet before replacing parts or units. When having access to the power supply, be sure to unplug the power cord from the power outlet. (2) Be careful not to lose screws, washers, or other parts removed for parts replacement. (3) When using soldering irons and other heat-generating tools, take care not to damage the resin parts such as wires, PCBs, and covers. (4) Before handling the PCBs, touch a metal portion of the machine to discharge static electricity; otherwise, the electronic parts may be damaged due to the electricity charged in your body. (5) When transporting PCBs, be sure to wrap them in conductive sheets such as aluminum foil. (6) Be sure to reinsert self-tapping screws correctly, if removed. (7) Tighten screws to the torque values listed on the next page. (8) When connecting or disconnecting cable connectors, hold the connector bodies not the cables. If the connector has a lock, always slide the connector lock to unlock it. (9) Before reassembly, apply the specified lubricant to the specified points. (Refer to Subsection 4.2 in this chapter.) (10) After repairs, check not only the repaired portion but also that the connectors and other related portions function properly before operation checks. (11) Once the print head unit prints, it will start head locking operation after five seconds from the end of printing. The head locking operation will take 5 to 10 seconds. NEVER unplug the power cord before the machine completes the head locking operation; doing so will make the print head unit unusable and require replacement with a new print head unit. When you receive the machine from the user or when you pack it for sending it back to the user, check the head locking state. 4-1

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4.1
DISASSEMBLY/REASSEMBLY
■
Safety
Precautions
To
prevent
the
creation
of
secondary
problems
by
mishandling,
observe
the
following
precautions
during
maintenance
work.
(1)
Unplug
the
power
cord
from
the
power
outlet
before
replacing
parts
or
units.
When
having
access
to
the
power
supply,
be
sure
to
unplug
the
power
cord
from
the
power
outlet.
(2)
Be
careful
not
to
lose
screws,
washers,
or
other
parts
removed
for
parts
replacement.
(3)
When
using
soldering
irons
and
other
heat
-generating
tools,
take
care
not
to
damage
the
resin
parts
such
as
wires,
PCBs,
and
covers.
(4)
Before
handling
the
PCBs,
touch
a
metal
portion
of
the
machine
to
discharge
static
electricity;
otherwise,
the
electronic
parts
may
be
damaged
due
to
the
electricity
charged
in
your
body.
(5)
When
transporting
PCBs,
be
sure
to
wrap
them
in
conductive
sheets
such
as
aluminum
foil.
(6)
Be
sure
to
reinsert
self
-tapping
screws
correctly,
if
removed.
(7)
Tighten
screws
to
the
torque
values
listed
on
the
next
page.
(8)
When
connecting
or
disconnecting
cable
connectors,
hold
the
connector
bodies
not
the
cables.
If
the
connector
has
a
lock,
always
slide
the
connector
lock
to
unlock
it.
(9)
Before
reassembly,
apply
the
specified
lubricant
to
the
specified
points.
(Refer
to
Subsection
4.2
in
this
chapter.)
(10)
After
repairs,
check
not
only
the
repaired
portion
but
also
that
the
connectors
and
other related
portions
function
properly
before
operation
checks.
(11)
Once
the
print
head
unit
prints,
it
will
start
head
locking
operation
after
five
seconds
from
the
end
of
printing.
The
head
locking
operation
will
take
5
to
10
seconds.
NEVER
unplug
the
power
cord
before
the
machine
completes
the
head
locking
operation;
doing
so
will
make
the
print
head
unit
unusable
and
require
replacement
with
a
new
print
head
unit.
When
you
receive
the
machine
from
the
user
or
when
you
pack
it
for
sending
it
back
to
the
user,
check
the
head
locking
state.
4-1