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TECHNICAL GUIDE
TROUBLESHOOTING
Symptom
Movement
The watch stops operat-
ing.
The current consumption
for the whole movement
e x c e e d s t h e s t a n d a r d
value.
The current consumption
for the circuit block alone
exceeds the standard val-
ue.
The DATE DIAL shows an
abnormal movement.
T he da te dial doe s not
move.
The date does not change.
Possible causes
The battery has been depleted.
The hour wheel and the pinion of
the minute wheel are not prop-
erly engaged. (Or the teeth of the
hour wheel and/or minute wheel
have been broken.)
The hooking portions of the cir-
cuit block cover are not properly
engaged, resulting in poor con-
ductivity.
The coil is broken.
One or more wheels have been
contaminated with dirt, dust or
other particles.
An excessive amount of oil in the
movement has caused adhesive
forces among the parts. (wring-
ing)
Dirt, dust or foreign particles are
adhered to the movement.
The driving pulse is generated in
order to compensate the exces-
sive load applied to the wheels.
(The oil has deteriorated, leaked
or run out.)
The light from outside the move-
ment is affecting the measure-
ment.
There is a defect in the IC (inte-
grated circuit).
The DATE DIAL has become im-
properly engaged with the date
dr i v in g w he e l or di s e n ga g e d
from the date driving wheel.
The date jumper has been disen-
gaged.
16/17
Cal. 7T85A
Solutions
Measure the bat ter y voltage.
Replace the battery with a new
one.
Check the relevant par ts, and
replace the damaged parts with
new ones.
Securely attach the hooks of the
circuit block cover to the main
plate.
Measure the coil block resist-
ance. Replace the coil with a new
one.
Remove dirt or dust and clean the
contaminated wheels. Be careful
so as not to damage the teeth of
the plastic parts while cleaning.
Remove dirt, dust or foreign par-
ticles and clean the movement.
If the current consumption for
the circuit block alone is within
the standard value range, over-
haul and clean the movement
parts, and then make the meas-
urement again.
Shut out the light, and make the
measurement again.
Replace the circuit block with a
new one.
Check the rotation and engage-
ment of the date dial.
bend the date dial downward to
adjust the clearance. Or replace
the date dial with a new one.
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