Time Accuracy Adjustment By Crown Operation - Seiko 4F32A Technical Manual

【Supplement】

Time accuracy adjustment by crown operation

(Only recommended to the Service Centers of SEIKO Affiliates and Distributors)
Although time accuracy is normally adjusted by pattern cutting (P.21), in case it cannot be adjusted within the
standard accuracy by this method, please adjust by the crown operation which is shown below:
1) Pull out the
crown to the
second click.
4) According to the above operations, the calendar
automatically moves as follows:
① The calendar will move to 8 from the current
date and stops initially.
② Then it automatically moves from 8 to 1 in order.
③
Then it automatically moves from 1 to 15 in order, each date takes 3 seconds to change to the next date.
The dates 1 to 15 correspond to the adjustable seconds in the following table.
Therefore, you have to decide beforehand how many seconds are necessary to adjust.
*
*
Note: Regarding the adjustable
seconds, this is based
accuracy before adjustment.
The adjustable amount is upto
–0.056, and you cannot increase
it beyond the limit by repeating
the above operations.
After you push back the crown to the original position (0 click), the calendar returns to the current date
and the second hand starts to move. (During the time when you are adjusting the accuracy, the watch
has been stopped and the time setting is necessary after the adjustment has finished.)
2) Push back the
crown to the first click
from the second click.
The second hand
starts to move at the
same time.
.
3 seconds
④ You choose the date according to the adjustable seconds and push the
crown to the original (0 click) position while the target date is displayed.
eg.) present accuracy: 0.100 seconds/day
When adjusted to be –0.056 seconds/day
Push the crown at the moment when the calendar shows "15". The accuracy after
the adjustment is about 0.044 seconds/day. If you have not pushed back the crown
at the date which should be done, the calendar changes to 16 after 15 and returns to
the current date.
on
Cal. 4F32A, 8F32A, 8F33A, 8F35A
3) Leave this 2) condition for 5 seconds and then
pull the crown out to the second click again.
(note: The second hand starts to move by the
operation 2), after 5 seconds by the second
hand, then pull the crown out to the second
click.)
after 5 seconds
3 seconds 3 seconds 3 seconds
21
(supplement)