Seiko 8T63A, Technical Manual

Page: 16 / 19

TECHNICAL GUIDE Cal. 8T63A
16/19
Operation Function
Checkpoint
Pull out the crown
to the 2nd click
and push it back
in to the normal
position. Repeat
the same several
times.
Setting mechanism
- s w i t c h i n g t h e
function of the time
setting
M a ke s ur e t h a t i t
has a click at each
p o s i t i o n a n d t h e
stem is not pulled
off.
P u l l o u t t h e
crown to the 1st
click, then turn it
clockwise.
Hands installation
Make sure that the
h o u r a n d m i n u t e
h a n d s m o v e
smoothly (without
touching each other
o f t o u c h i n g t h e
surface of the dial or
inside of the glass).
M a k e s u r e t h a t
t h e d a y c h a n g e s
smoothly.
Calendar mechanism
- correcting the day
Make sure that the
date changes when
the hour and minute
hands pass around
midnight.
Calendar mechanism
- date change
●
Function check
Press button A
to start the stop-
watch.
Press button A
again to stop the
stopwatch.
Press but ton B
to reset the stop-
watch.
Stopwatch
mechanism
Make sure that the
Stopwatch hands
start/stop smoothly.
Make sure that the
Stopwatch hands
a r e r e s e t t o t h e
“0” position.
Pull out the crown
to the 2nd click,
then turn it.
Setting mechanism
- hour and minute
hand setting
A
B
A A B
Start Stop Reset