TECHNICAL GUIDE
Cal. 7T04A
20/21
Movement
TROUBLESHOOTING
The watch stops operat-
ing.
The battery has been depleted.
Measure the bat tery voltage.
Replace the battery with a new
one.
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.)
Check the relevant par ts, and
replace the damaged parts with
new ones.
The hooking portions of the cir
-
cuit block cover are not properly
engaged, resulting in poor con
-
ductivity.
Securely attach the hooks of the
circuit block cover to the main
plate.
The coil is broken.
Measure the coil block resist
-
ance. Replace the coil with a new
one.
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)
Remove dirt or dust and clean the
contaminated wheels. Be careful
so as not to damage the teeth of
the plastic parts while cleaning.
The current consumption
for the whole movement
ex c e e d s t h e s t a n d a r d
value.
Dirt, dust or foreign particles are
adhered to the movement.
Remove dirt, dust or foreign par
-
ticles and clean 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.)
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.
The current consumption
for the circuit block alone
exceeds the standard val
-
ue.
The light from outside the move
-
ment is affecting the measure
-
ment.
Shut out the light, and make the
measurement again.
There is a defect in the IC (inte
-
grated circuit).
Replace the circuit block with a
new one.
Symptom Possible causes Solutions
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