Troubleshooting
Signal Reception (Time
Calibration Signal)
Q1
The watch cannot perform a receive
operation.
Is the watch’s battery charged?
Signal reception is not possible while
battery power is low. Keep the watch
exposed to light until it recharges
sufficiently.
l
Is the watch in the Timekeeping Mode or
World Time Mode?
Time signal receive is not possible unless
the watch is in the Timekeeping Mode or
World Time Mode. Enter the Timekeeping
Mode or World Time Mode.
l
Is your Home City setting correct for your
location?
The watch will not indicate the correct time
if the Home City setting is wrong. Change
your Home City setting so it correctly
reflects your location.
l
After checking the above, the watch still
cannot perform a receive operation.
Time calibration signal reception is not
possible under the conditions described
below.
●
When watch is at Level 2 power saving
●
Timer countdown operation in progress
If successful reception is not possible for
some reason, you can adjust the time and
day settings manually.
Q2
The signal receive operation always
fails.
Is the watch in a location that is appropriate
for signal reception?
Check your surroundings and move the
watch to a location where signal reception
is better.
l
Appropriate Signal Reception Location
Did you avoid touching the watch while the
receive operation was in progress?
Minimize movement of the watch and do
not perform any watch operation while a
receive operation is in progress.
Is there an alarm configured to sound
during the same period that the signal
receive operation is performed?
Receive stops if an alarm operation starts
while it is being performed. Disable the
alarm.
l
Turning Off an Alarm or the Hourly
Time Signal
Is the signal transmitter in your area
transmitting a signal?
The transmitter of the time calibration may
not be transmitting a signal.
Try again later.
Q3
Signal reception should have been
successful, but the watch’s time and/
or day is wrong.
Adjust time and day settings manually.
l
Using Watch Operations to Adjust the Time
Setting
World Time
Q1
The time for a World Time City is not
correct.
The summer time setting (standard time/
summer time) is wrong.
l
Alarm
Q1
The alarm does not sound.
Is the alarm setting turned on? If it isn’t, turn it
on so it will sound.
l
Charging
Q1
The watch does not work even
though it is exposed to light.
The watch stops operating whenever the
battery goes dead. Keep the watch exposed
to light until it recharges sufficiently.
l
Q2
[H], [M], and [L] are flashing on the
display.
The watch is in the charge recovery mode.
Wait until the recovery process is complete
(about 15 minutes). The watch will recover
more quickly if you place it in a brightly lit
location.
●
If a signal receive operation, alarm, hourly
time signal, illumination and/or other power-
intensive functions are used within a short
period of time, the charge level of the battery
will drop and cause the watch to go into a
charge recovery mode. Function availability
will be temporarily limited, but functionality
will return after the battery recovers.
l
Q3
[CHG] is flashing on the display.
The charge level of the watch is extremely low.
Immediately expose the watch to light to
charge it.
l
Other
Q1
I can’t find the information I need
here.
Visit the website below.
https://world.casio.com/support/
Watch Operation Guide 3495
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