Service manual
HAY
2
4
7969
10. rifthtcn Ihe pawl
bridge lode
screw and
check (he lightness
of the pawl
bridge
pivot
screw,
to assure
that the bridge
is rigidly
clampod in
position. The ACCU-
TRON
train should continue
to run
(Test Sel switch
at "LOW
AMPLITUDE"
position), tf it does
not. the adjustment
must
be made again
(steps
7
through
10).
13. Disconnect
the Test Set frum the
movement.
Taring 218 Power Cafl
""
1. Place
the Power Cell
(with yellow
seal up) in nest of
Test Set.
2.
Turn rotary switch
on Test Set
to "CHECK POWER
CELL"
position
3. Read Power
Cell
voltage
on right-hand
scale.
The voltage raiding
should be in the
"OK" area
of scale (1 .25 to
1.45 volts) IT
it is. Power Cell is
in satisfactory
operating
• (•minion.
Note: Poor
electrical
contact between
Power
Cell and
Test Sol will
cause
either
|
low reading
or a wavering
indication
of cell voltage.
It can
be readily
vofdfld
by making
certain that Power
Oil surfaces
and contacting
points
of the Twit
Set
neat and clip
are clean. Rubbing
Of
twitting a suspected
cell between
the
contacts while
checking
voltage la gnod
practice
A wavering reading
ol
age
is always an
indication
of
pool Contact,
DO)
an iml
ion of a had
celL
Testing should
always be done
with the
authorized ACCUTRON
Test
Set or
wilh a
high-resistance voltmeter
(hnvtng
nol lens than 10,000
ohms per volt
crudtivity),
such
u the
ACCUTRON Power
Coll
Tetter"-
Caution: Never use substitute
cells in place of the
genuine "ACCUTRON
2IB" |w
,-
t
OH. Though other
cells may look
the same, they will
not reliably operate
this
model timepiece and
Bay,
in
some instances,
seriously damage
the
movement The only
correct Power Cell
b« 'ACCUTRON
210"
imprint
(sec picture above).
sling
Klnctmi ;ii1
The following
procedure
is performed
with the Power
Cell
in the nest of the Tent
Set
and
the movement
positioned
In Ihe movement
holder.
1. Insert
plug up
of Test Set lead inio
the jack
of the movement
holder.
(See Fig, 21.)
2.
Insert tab tip
of other lead
of Test
Set under cell strap as shown in Pig.
21.
3. Turn rotary switch
on Test Set to
"READ MICROAMPERES"
position. The Test
Set
meter should
give a reading
of current on left-hand
scale. (It may
be necessary
to lap movement lightly
to start tuning
fork vibrating after connecting
Test
Set
leads.)
4. Observe current
reading. If
reading is in
the "OK" area
of scale (tl.0 lo
10,0 micro-
amperes for the dialed
movement
with indexing
mechanism
engaged) electronic
circuit
is operating satisfactorily.
Bare
fork operation
[that is pillar
plate, tuning
fork
and coils only}
may give a
current reading
as low as 6 microamperes.
'Not
shown
in
litis
publication
19