Seiko 7T85 Technical Manual page 14

Double retrograde chronograph
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TECHNICAL GUIDE
● Function check
Before doing the following function check, follow the instructions on P.3 to correct the hand
positions, set the time and operate the stopwatch function.
Operation
55
50
45
40
35
55
50
45
40
35
55
50
45
40
35
55
50
45
40
35
Pull out the crown to
the 2nd click and push
it back in to the normal
position. Rep eat the
same several times.
Pull out the crown to
the 1st click, then turn
it.
Pull out the crown to
the 2nd click, then turn
it.
<Standard Measurement>
Press button A to stop the
A
stopwatch.
Press button B to reset the
stopwatch.
A
A
Start
Stop Reset
B
<Split Time Measurement>
A
B
B
Start
Split Split
Stop
Release
Function
Setting mechanism
- switching the func-
tion of the time set-
ting
C a l e n d a r m e c h a -
n i s m - c o r r e c t i n g
the date if available
Second hand s top
f un c tion ( i f avail -
able)
Setting mechanism
- hour and minute
hand setting
Hands installation
C a l e n d a r m e c h a -
nism - date change
Stopwatch mecha-
nism
B
A
B
Reset
14/17
Cal. 7T85A
Check point
Make sure that it has a
click at each position
a n d t h e s t e m i s n o t
pulled off.
Make sure that the date
changes smoothly.
Make sure that the sec-
ond hand stops when
the crown is pulled out
to the 2nd click.
M a k e s u r e t h a t t h e
hour and minute hands
move smoothly (with-
o u t t o u c h i n g e a c h
other or touching the
sur face of the dial or
inside of the glass).
Make sure that the date
changes when the hour
and minute hands pass
around midnight.
M a k e s u r e t h a t t h e
Stopwatch hands start/
stop smoothly.
M a k e s u r e t h a t t h e
Stopwatch hands are
reset to the "0" posi-
tion.

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