When A Radio Signal Cannot Be Received; How To Manually Set The Time; How To Manually Set The Date - Seiko C-21 Instructions Manual

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When a radio signal cannot be received

When a radio signal cannot be received, refer to the following.
• Not receivable within the radio signal reception range
Check that the time zone of the area where the watch is used is set.
When the watch is unable to display the correct time, date or day of the week even if the time zone is
selected, refer to Troubleshooting. "Reception of a radio signal" → P.89
If the above remedies do not solve the problem, set the time, date or day referring to the "How to Manually
Set the time, date or day" section below.
"How to manually set the time" → P.73
"How to manually set the date" → P.75
"How to manually set the day of the week" → P.78
* For the radio signal reception ranges, refer to "Radio signal reception range indication" → P.19.
• When the watch is used outside the radio signal reception range
7
Select the time zone of the area where the watch is used.
"How to select the time zone (How to display the local time around the world)" → P.31
When the watch is unable to display the correct time, date or day of the week even if the time zone is
selected, manually set the time, date or day of the week.
72
EN
2
Press Button A or B to set the time.
One minute
Press button once and then release it.
Advance
Keep pressing down the button for
Continuous
longer than 2 seconds. Press the button
Advance
once again to stop.
* The hands do not move by turning the crown.
* The moment the date changes is midnight (12 AM). Please
be sure to set the time after ensuring that AM/PM is set
correctly.
* When the watch switches to the manual time setting mode,
the reception result data is lost. Therefore, the reception
result is indicated as "N".
3
Push the crown back in according to the time
signal, etc.
The operation is completed.
7
The watch starts to work.
* When the crown is a screw lock type, lock it. → P.14
74
EN

■ How to manually set the time

If the watch is continually used in an environment in which a radio signal cannot be received (a region other than the
radio signal reception ranges, etc.), set the time manually.
"Radio signal reception range indication" → P.19
• When using the watch again in regions in which the watch is able to receive a radio signal, it is recommended to
perform" Manual reception." "Automatic reception and manual reception" → P.18
• When adjusting the time, the date and day will be accordingly adjusted.
* Even if a radio signal cannot be received, the watch can be used with the same accuracy as that of a normal quartz watch.
(Average gain/loss ±15 seconds per month)
* When the watch receives radio signals after the time is manually adjusted, it displays the time received from radio signals.
1

■ How to manually set the date

Button A
When the date is not changed automatically due to an environment in which a radio signal cannot be received outside
Press to turn
the radio signal reception range, etc. (when changing from a month with 30 days or less to a month with 31 days), set
clockwise
the date manually.
• The date can be adjusted independently regardless of the time or day of the week.
• To use the watch in a radio signal receivable condition again, conduct automatic signal reception to set the time.
"Automatic reception and manual reception" → P.18
Button B
* When the watch receives radio signals after the date is manually adjusted, it displays the date received from radio signals.
Press to turn
* If the date remains incorrect even after a successful radio signal reception, the preliminary position of the date may be misaligned.
counterclockwise
"Setting the preliminary position of the date, day hand, hour and minute hands" → P.82
1
0 1 2
Push the
crown
back in
Pull out the crown to the second click.
The seconds hand moves to the zero second position and
stops.
The watch switches to the manual time setting mode.
* When the crown is a screw lock type, unlock it. → P.14
Pull out the crown to the first click.
The seconds hand rotates until it points to the 30-second
position and stops.
Both the main watch and the sub dial continue to operate.
* When the crown is a screw lock type, unlock it. → P.14
0 1 2
Pull out the
crown to the
7
second click
73
EN
Pull out the
0 1 2
crown to the
7
first click
75
EN

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