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Special Points
for
ihc
ACCUTRON
Repairmnn
1.
Removing
or Re-
placing
Hands
2.
Replacing
Slem
The
ACCUTRON
movement,
br-ing
completely
different
from
conventional
watch
movements,
requires
different
techniques
in
its
repair.
Otherwise,
it
may
be
damaged
by improper procedures on
the part
of
the
repairman.
For example,
turning the
hands
or the gear
train fin
either direction)
with
the
hack
lever disengaged,
will
damage
the
index
wheel
teeth or the
index
and pawl
fingers
The
repairman's
attention
is
called
to
the
following
special points:
Always
pull
crown
out
[setting
position)
before touching
the
hands
for
any
reason.
As
with convrnlionul watches,
the
stem
should preferably
be
pulled
"out" [setting
position)
before loosening
the setting lever
screw
to
remove
the stem. In replacing
lhestem.il
it
in
pushed
in,
beyond
1
In-
point of
engagement
with
the pin
on
the setting
lever, the
hunk
levi-miny
btdopEHttd
In this
bnrtftt
t
turning the
crown
will
dam-
age
the
indexing
mechanism.
For
thin
reason,
do
nol
push
the
item
in
beyond
the
point
where
the
stum
groove
may
be engaged by
the netting lever
pin.
before
tight-
ening
the Betting lever
screw.
3.
Index
Wheel
The
teeth
on
the
index
wheel
will
not
wear
away
in
normal
use.
nor can they
be
damaged
as
u result
of
any
accident,
when
the
movemont
is
enclosed
in
its
caw
(with
the
crystal
inl.iU].
The
index
wheel can
only be
damaged
by improper
handling
on
the
pad
of
the
repairman.
If
It
is
suspected
that
the teeth
on
the
index
wheel have
been damaged,
the
moat
practical
solution
ts
to
replace
it.
since visual
examination
will
rarely
d
Induse
the
damage
because of
the
size of
these
tiny teeth.
4. Electrical
Contact
5.
Circuit
6.
Magnetism
7.
Magnets
Partially
Demagnetized
8.
Adjustment
of Indexing
Mechanism
Make
a
habit of
cleaning
the
cell
strop,
which
can be
done
efficiently
with
an
eraser,
and wiping
any
while adherent
material,
if
present,
from
the
Power
Cell.
Such
material
may
(sometime?]
"push"
the
cell
strap
away
from
the
Power
Cell
and
thereby break
elect
rlcul
contact
In
such
instances
removing
the residue, particularly
on
the
underside
of the
cell
utrnp
will
prevent
a latent
problem
in this
regard,
i
I
.
ice
ul elei
i-i. .i| i.-.t
equipment
in proi
rdurcs
uthi'i
than
UMM
:.-i
mmm-mied.
should be avoided.
In
p.irin ular.
circuit
elements can be
damaged
by
the
use
of
an
nhinmeter
for testing ihe
circuit.
Never
demiigiicli/.e
an
ACCUTRON
movement
or
expose
It
to
high-strength
magnetic
fields
(permanent magnets,
lor
example).
Diagnosis
procedures
in
the
preceding
servicing instructions
have
not
covered
the
identification
oT (rouble caused
by
demagnetized
tuning fork magnets,
for
reasons
of
simplified
I
ion.
Experience has
shown
that
such
trouble
is
very
rare.
If
the
move-
ment
current
h
within
the
"OK"
area
of (he scale
on
the
Test
Set.
the
magnets
arc
satisfactorily
mngnvli/.ed
If
the
tuning
fork
magnets have
lost
most
of
their
magnetism,
the tuning fork
will
fall
to
vibrate
and
the Test Set
will
Endicall
I
very high current-normally
interpreted
as
due
to
a
faulty
electronic
circuit.
If
(he
magnets have
lost
only a portion of
their
magnetism,
the
tuning
fork
may
vibrate but the
Test
Set
will
indicate
that
the cur-
rent
is
above
the
"OK"
area of the scale
In
each
of these
instances,
if
an excessively
high current
(and/or
failure
of the
tuning fork
to
vibrate)
cannot be
corrected
by
replacing the
complete
coll
assembly—
try substituting
a
different
tuning
fork.
If
the tuning fork
magnets
have been demagnetized—
the tuning fork
assembly must
be
returned
to
Dnlova
for
rcmagnetizing.
It
is
always good
practice
to
check
the
adjustment
of the
indexing
mechanism
after
replacing the
dial
and
hands. This
is
because
the
adjustment of the indexing
mechan-
ism
can
change
as
»
result
of the
slightest
turning
of
the center
second
pinion
when
the
hand
is
applied.
14
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