Complete
Teardown,
Cleaning,
and
Reassembly
of
the
Olympus
BH
‐
2
Sliding
Focus
Block
Revision
2
Page
8
of
23
Separate
the
Arm
from
the
Base
Separate
the
arm
from
the
base
of
the
stand
per
the
following
procedure.
Remove
the
Lamphouse
Remove
the
lamphouse
from
the
base
by
grasping
it
and
pulling
it
straight
back
(see
Figure
3
).
Do
not
touch
the
halogen
lamp
with
your
fingers,
as
oils
from
your
skin
may
cause
premature
failure
of
the
bulb.
If
the
bulb
is
accidentally
touched,
clean
it
with
isopropyl
alcohol.
Figure
3
–
Remove
the
lamphouse
from
the
base
Remove
the
Electrical
Base
Carefully
turn
the
stand
upside
down.
Use
a
4mm
(or
5/32”)
Allen
wrench
or
driver
to
remove
the
four
M5x12
hex,
socket
‐
head
cap
screws
and
the
associated
washers
from
the
bottom
of
the
stand
(see
Figure
4
)
.
Figure
4
–
Bottom
view
of
the
BHT/BHTU
electrical
base
Hold
the
electrical
base
in
place
and
set
the
stand
in
its
normal
upright
position
on
a
flat
surface,
being
careful
not
to
let
the
electrical
base
shift
as
you
do
so.
Lift
the
stand
from
the
electrical
base
by
grasping
the
arm
and
lifting
straight
up
until
the
bottom
of
the
stand
well
clears
the
electrical
base.
If
the
stand
contains
a
light
‐
preset
control/switch
(see
Figure
5
),
be
sure
to
disengage
the
preset
control/switch
from
the
notch
in
the
side
of
the
base
2
before
lifting
the
stand
clear
of
the
electrical
base.
Set
the
electrical
base
aside.
Figure
5
–
Light
pre
‐
set
control
and
pre
‐
set
switch
Remove
the
Arm
from
the
Base
Lay
the
stand
on
its
back.
Use
a
5mm
Allen
wrench
or
driver
to
remove
the
four
M6x25
hex,
socket
‐
head
cap
screws
securing
the
arm
to
the
base
(see
Figure
6
)
and
separate
the
arm
from
the
base
(see
Figure
7
).
Figure
6
–
Remove
screws
securing
the
arm
to
the
base
Figure
7
–
Separate
the
arm
from
the
base
2
Or
unplug
the
two
electrical
connectors
from
the
printed
circuit
board.
