Troubleshooting - Seiko 6T63A Technical Manual

TECHNICAL GUIDE

TROUBLESHOOTING

Symptom
Movement The watch stops operating.
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
e x c e e d s t h e s t a n d a r d
value.
Possible causes
The battery has been depleted.
The hour wheel and the pinion of
the minute wheel are not properly
engaged. (Or the teeth of the hour
wheel and/or minute wheel have
been broken.)
T h e h o o k i n g p o r t i o n s o f t h e
c i r c u i t b l o c k c o v e r a r e n o t
properly engaged, resulting in
poor conductivity.
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. (wringing)
Dirt, dust or foreign particles are
adhered to the movement.
The driving pulse is generated in
order to compensate the excessive
load applied to the wheels. (The
oil has deteriorated, leaked or run
out.)
T h e l i g h t f r o m o u t s i d e t h e
m o v e m e n t i s a f f e c t i n g t h e
measurement.
T h e r e i s a d e f e c t i n t h e I C
( in te gra te d c ir c ui t ) .
18/19
Cal. 6T63A
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 resistance.
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 dir t, dust or foreign
particles and clean the move-
ment.
If the current consumption for
the circuit block alone is within
t h e s t a n d a r d v a l u e r a n g e ,
overhaul and clean the move-
ment parts, and then make the
measurement again.
Shut out the light, and make the
measurement again.
Replace the circuit block with a
new one.