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Replacing
the 218
Power
Cell
a.
Remove
case back, using
a
suitable case
wrench
to
unscrew
the locking-ring.
b.
Loosen
coil
lorm screw
slightly.
c
Loosen
cell
strap
hold-down
screw,
swing
cell
strap
out
and
remove Power
Cell as
shown
(see Fig.
3).
d.
Remove
coil
form screw
(with
insulator)
and
cell
strap,
Inspect
(with loupe) under-surface
of
cell
strap
for
foreign
matter
which
may
affect electrical
contact with
Power
Cell.
If
necessary, clean
with an
eraser
and
dip-rinse.
e.
With
the
cell
strap
off.
check
thai
the insulating posl of the
cull
coil
assembly hus
not
been
damajtr.
1
through
improper
installation
Of
a
Power
Cell;
attach
cell
strap
by
loosely
installing coil
form
screw
(with
its
mutilator]
through
cell
strap,
making
certain
cell
strap
is
correctly
positioned
.imund
the insulating post of
the
cell coil
assembly.
f.
Install
the
Power
Cell
with
imprinted
side
down
(see
Fig. 3);
reposition
cell
strap
under
tbt
hold-down screw and
sccurr
screws.
g.
Check
that
case gasket
is
properly
positioned; replace
case
back
and
tighten locking-ring.
Note:
If
sweep-second hand does
not
turn,
be
sure
stem
is
in
the
normal
or
"in"
position.
If
so,
tap
the case
lightly
at
"3" or "9"
to
start
tuning fork
vibrating.
COIL
FORM SCREW
WITH INSULATOR
POWER
CELL
CELL
SIMP
CELL
COIL
ASSEMBLY
Fig.
a
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