In Case Of An Abnormal Movement; Reset The System; Specifications - Seiko 7B72 How To Use 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, then it can be returned to normal operation using the following operation.

■ Reset the system

1
Pull the crown to the second click.
The seconds hand stops on the spot.
* When the crown is a screw lock type, unlock it.
→ P.13
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Specifications

Cal.
1. Features Basic watch with three hands (Hour, minute and seconds hands), date display
2. Frequency of crystal 32,768 Hz (Hz= Hertz, cycles per second)
oscillator
3. Loss/gain (Monthly Loss/gain ±15 seconds in a monthly rate (Except the cases when the watch is used
rate) without time adjustment by receiving a radio signal and when it is worn on the wrist within
a normal temperature range between 5 °C and 35 °C)
4. Operational Between −10 °C and +60 °C
temperature range
5. Driving system Step motor (Hour and minute hands, seconds hand, and the date)
6. Power source Secondary battery, 1 piece
7. Duration Approximately 9 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
2 years at maximum.
Automatic reception (Before 2:00 AM, 3:00 AM and 4:00 AM)
8. Radio signal reception
function / radio signal * It varies depending on the radio signal receiving condition.
* After radio signal reception, the watch will start to work depending on the quartz movement
transmitting station
until the next reception.
8
* Manual reception is available.
9. Integrated circuit Oscillator, frequency divider, drive and reception circuit: IC, 2 pieces
* The specifications are subject to change without prior notice due to product improvements.
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Pull out the
0 1 2
crown to the
second click
7B62 / 7B72
2
Press and hold the button for 5 seconds
and then release it.
After releasing the button, approximately 5 seconds
later the seconds hand moves, and stops at the
0-second position.
Then the hour and minute hands will start to move
and stop pointing to 12 o'clock 0 minutes.
* The button cannot be operated until all the hands stop.
3
When all the hands stop pointing to 12 o'clock 0 minutes and 0 seconds, push
the crown back.
The seconds hand starts moving from 12 o'clock 0 minutes and 0 seconds.
* After a system reset, the time difference setting is set to +9 hours (JJY).
After completion of a system reset, perform the following operations.
• "Set the preliminary position for the date, and the hour and minute hands." → P.65
• "Setting the time difference (Setting the radio signal transmitting station)" → P.29
• "How to conduct manual reception (Receive a radio signal manually)" → P.56
* When the crown is a screw lock type, lock it. → P.13
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Press and hold the
button for 5 seconds
and then release it
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