Citizen AT9010-52E Instruction Manual page 61

Receiving the time signal manually (On demand reception)
• If your current location is outside the reception area of the time zone chosen, the
watch will not receive a radio signal. Change the time zone to one within the radio
reception area of your locale.
• Press and hold the lower right button
reception.
• The reception operation is complete when normal time indication resumes.
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for two or more seconds to cancel the signal