Place one fresh 1.5V AA alkaline battery into the compartment. Wait: Hands will fast-forward and stop at 12:00 .
Occurs multiple times a day (usually overnight) to maintain accuracy. Initial Setup and Automatic Calibration
Place the clock near a west-facing window overnight.
You can find high-quality PDF manuals for the CH-899 movement on websites like manualzz.com and mag-clock.co.jp . A link to an official CH-899 manual is available through mag-clock.co.jp if you need to download another copy.
Atmospheric interference is lowest between midnight and 5:00 AM. Leave the clock by a window overnight to allow it to sync automatically. Forced Signal Reception (REC / WAVE Button)
Household appliances can block the delicate radio waves required by the CH899 receiver.
Once the signal is captured, the hands will fast-forward to the exact, correct local time. Manual Time Setting Procedure