Complete
Teardown,
Cleaning,
and
Reassembly
of
the
Olympus
BH
‐
2
Sliding
Focus
Block
Revision
2
Page
9
of
23
With
the
electrical
base
removed,
fragile
lighting
components
are
exposed
on
the
open
bottom
of
the
base
which
may
be
damaged
if
the
base
is
not
placed
on
a
suitable
clutter
‐
free
surface.
Place
the
base
in
its
normal
upright
position
on
a
clean,
flat
surface
someplace
out
of
harm’s
way
and
where
dust
and
debris
will
not
accumulate
on
the
exposed
lighting
components.
Disassemble
the
Sliding
Focus
Block
Disassemble
the
sliding
focus
block
mechanism
per
the
following
procedure.
Remove
the
Trim
Cover
Use
a
suitable
JIS
screwdriver
to
remove
the
four
M2x4
screws
securing
the
U
‐
shaped
trim
cover
onto
the
arm
casting
(see
Figure
8
).
Figure
8
–
Remove
screws
securing
the
trim
cover
Remove
the
(now
loose)
trim
cover
from
the
arm
casting
(see
Figure
9
).
Figure
9
–
Remove
the
loose
trim
cover
from
the
arm
Loosen
the
Screws
Tensioning
the
Slide
Mechanism
Use
a
2.5mm
Allen
wrench
or
driver
to
loosen
(but
do
not
remove)
the
three
M3x12
hex,
socket
‐
head
cap
screws
securing
the
guide
block
into
position
on
the
back
side
of
the
focus
block
(see
Figure
10
).
Figure
10
–
Loosen
screws
securing
guide
block
in
place
Use
a
2.5mm
Allen
wrench
or
driver
to
loosen
(but
do
not
remove)
the
two
M3x16
hex,
socket
‐
head
cap
screws
tensioning
the
slide
mechanism
(see
Figure
11
).
Figure
11
–
Loosen
screws
tensioning
slide
mechanism
Remove
the
Focus
Block
Assembly
from
the
Arm
Carefully
slide
the
focus
block
(with
attached
guide
block)
out
the
bottom
of
the
arm
(see
Figure
12
),
being
careful
to
not
lose
any
of
the
cylindrical
rollers
or
spacer
rods
in
the
process
(there
are
eight
rollers
and
one
spacer
rod
on
each
side
of
the
slide
mechanism).
Figure
12
–
Withdraw
focus
block
assembly
from
the
arm
