TECHNICAL GUIDE
Cal. 6T63A
19/19
STOP WATCH
One or more STOP-
WATCH hands have
stopped moving or show
an abnormal movement.
The relevant coil is broken.
Measure the coil block resistance.
Replace the coil with a new one if
necessary.
An excessive load is being
applied to the chronograph
wheels due to dust or foreign
particles adhering to them or
oil starvation.
Clean the relevant parts and
lubricate with an adequate
amount of oil.
The step motor shows an
abnormal movement
.
There is a crack on the circuit
block switch pattern.
Replace the circuit block with a
new one.
The buttons do not operate
normally.
The amount of oil around the
buttons is insufficient.
Clean the buttons and lubricate
appropriately.
The circuit block pattern has
been broken or bent.
Adjust the circuit block pattern
or replace the circuit block with a
new one.
The crown falls off.
The winding stem is not securely
installed. (The setting lever and
yoke are disengaged.)
Check the main plate, winding
stem, setting lever and yoke.
Replace the defective parts with
new ones.
The current consumption
exceeds the standard value.
An excessive load is being
applied due to friction among
the hour, minute and STOP-
WATCH hands.
Small amount of water/
blur inside of the glass
persists.
Water resistance is deteriorated.
The watch has been subjected to
water pressure that exceeds the
guaranteed degree.
Investigate the causes to take
necessary measures, while
cleaning inside of the watch.
Replace the stator with a new
one.
Adjust or remount the relevant
hands.
Symptom
Possible causes
Solutions
Exterior
parts
The step motor has been deformed.
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