TECHNICAL GUIDE
Cal. 7T04A
21/21
STOPWATCH
O n e o r m o r e S T O P -
W A T C H h a n d s h a v e
stopped moving or show
an abnormal movement.
The relevant coil is broken.
Measure the coil block resist
-
ance. Replace the coil with a new
one if necessary.
An excessive load is being ap
-
plied to the chronograph wheels
due to dust or foreign particles
adhering to them or oil starva
-
tion.
Clean the relevant parts and lu
-
bricate 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 oper
-
ate normally.
The amount of oil around the but-
tons is insufficient.
Clean the buttons and lubricate
appropriately.
The circuit block pat tern 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 ap-
plied due to friction among the
hour, minute and STOPWATCH
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 clean
-
ing 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 b e en d e
-
formed.
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