In Case Of An Abnormal Movement; Specifications - Seiko 7B27 Instructions Manual

In case of an abnormal movement

In the case that the watch moves abnormally or that the watch does not move at one-second intervals even after fully
charging the battery, perform the procedures from 1. to 3. and then set the preliminary positions and select the time zone.
■ How to reset the built-in IC
Button A
2. Press for
3 seconds
1.
0 1 2
3.
Button B
2. Press for
3 seconds
7
※ Unlock the crown before operating it and then,
relock it after completing the operation. → P.81
(NOTE) F irst, press Button B, and subsequently press
Button A while holding down Button B so as to
press both of them successfully.
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1. Pull out the crown to the second click.
The second hand stops at the 0-second position.
2. Keep pressing down Button A and B at the same
time for 3 seconds, and then release them.
Within 5 seconds after releasing the buttons, the second
hand makes a full rotation and stops pointing to the 0-second
position. Then the hour and minute hands will start to move
and stop pointing to 12 o'clock 0 minutes.
(NOTE)
3. When all the hands stop pointing to 12 o'clock
0 minutes and 0 seconds, push the crown back.
The second hand starts moving from 12 o'clock 0 minutes and 0 seconds.
※ After the built-in IC is reset, the watch is set to the time zone LON.
After completion of a system reset, perform the following operations.
・ How to correct the preliminary positions → P.127 - 129
・ How to select the time zone → P.86 - 87
・ How to adjust the time (forced reception method) → P.119 - 120

Specifications

1. Basic feature ����������������� Basic watch with three hands (hour, minute and second hands), date display
2. Frequency of crystal oscillator ��� 32,768 Hz (Hz = Hertz ... Cycles per second)
3. Loss/gain (monthly rate) ����� Loss / gain ±15 seconds on a monthly rate (Except the case when the watch is
used without an automatic time setting by receiving a radio signal and when it is
worn on the wrist within a normal temperature range between 5℃ and 35℃).
4. Operational temperature range ��� Between −10℃ and +60℃
5. Driving systems �������������� Step motor (Hour and minute hands, second hand, and the date)
6. Power source ���������������� Secondary battery, 1 piece
7. Duration of operation ��������� Approximately six months (Fully charged, and the Power Save is not activated).
※ If Power Save is activated after it is fully charged, the watch continues to run
for approximately one and a half years at maximum.
8. Time setting by receiving ���� Automatic reception (before 2:00 AM, 3:00 AM and 4:00 AM)
the JJY-LF radio signal ※ Reception attempts depend on the radio signal receiving conditions.
※ After having received a radio signal, the watch will start to move depending on
the quartz movement until the next reception.
※ Manual reception is also available.
9. IC (Integrated Circuit) �������� Oscillator, frequency divider and driving circuit C-MOS-IC, 3 pieces
※ The specifications are subject to change without prior notice for product improvement.
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