Brother International HL 760 Service Manual - Page 23

Disassembly, Reassembly

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CHAPTER III DISASSEMBLY AND REASSEMBLY 1. SAFETY PRECAUTIONS To prevent the creation of secondary problems by mishandling, be careful about the following precautions during maintenance work. (1) Always turn off the power switch before replacing parts or units. When accessing the power supply PCB or components, be sure to unplug the power cord from the power outlet. (2) Be careful not to lose screws, washers, or other parts removed. (3) Be sure to apply grease to the gears and applicable positions specified in this chapter. (4) When using soldering irons or other heat-generating tools, take care not to damage the resin parts such as wires, PCBs, and covers. (5) Before handing the PCBs, touch a metal portion of the equipment to discharge the static electricity charged in your body, or the electronic parts or components may be damaged. (6) When transporting PCBs, be sure to wrap them in conductive sheet such as aluminum foil. (7) Be sure to replace self-tapping screws correctly, if removed. Unless otherwise specified, tighten screws to the following torque values. TAPTITE, BIND or CUP B M3 : 6kgf • cm M4 : 9kgf • cm TAPTITE, BIND S M3 : 9kgf • cm SCREW M3 : 7kgf • cm M4 : 1Okgf • cm (8) When connecting or disconnecting cable connectors, hold the connector bodies, but not the cables. If the connector has a lock, release the connector lock first to unlock it. (9) After a repair, check not only the repaired portion but also the connectors, or check if other related portions are functioning properly before doing operation checks.

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CHAPTER
III
DISASSEMBLY
AND
REASSEMBLY
1.
SAFETY
PRECAUTIONS
To
prevent
the
creation
of
secondary
problems
by
mishandling,
be
careful
about
the
following
precautions
during
maintenance
work.
(1)
Always
turn
off
the
power
switch
before
replacing
parts
or
units.
When
accessing
the
power
supply
PCB
or
components,
be
sure
to
unplug
the
power
cord
from
the
power
outlet.
(2)
Be
careful
not
to
lose
screws,
washers,
or
other
parts
removed.
(3)
Be
sure
to
apply
grease
to
the
gears
and
applicable
positions
specified
in
this
chapter.
(4)
When
using
soldering
irons
or
other
heat
-generating
tools,
take
care
not
to
damage
the
resin
parts
such
as
wires,
PCBs,
and
covers.
Before
handing
the
PCBs,
touch
a
metal
portion
of
the
equipment
to
discharge
the
static
electricity
charged
in
your
body,
or
the
electronic
parts
or
components
may
be
damaged.
(6)
When
transporting
PCBs,
be
sure
to
wrap
them
in
conductive
sheet
such
as
aluminum
foil.
Be
sure
to
replace
self
-tapping
screws
correctly,
if
removed.
Unless
otherwise
specified,
tighten
screws
to
the
following
torque
values.
TAPTITE,
BIND
or
CUP
B
M3
:
6kgf
•
cm
M4
:
9kgf
•
cm
TAPTITE,
BIND
S
M3
:
9kgf
•
cm
SCREW
(
5
)
(
7
)
M3
:
7kgf
•
cm
M4
:
1
Okgf
•
cm
(8)
When
connecting
or
disconnecting
cable
connectors,
hold
the
connector
bodies,
but
not
the
cables.
If
the
connector
has
a
lock,
release
the
connector
lock
first
to
unlock
it.
(
9
)
After
a
repair,
check
not
only
the
repaired
portion
but
also
the
connectors,
or
check
if
other
related
portions
are functioning
properly
before
doing
operation
checks.