Key facts
- Brand
- Citizen
- Model
- U680
- Category
- Watches
- Industry
- Appliances
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2026-10-14
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Citizen U680 Abbreviated Instruction Manual
This document serves as an abbreviated instruction manual for the Citizen U680 solar-powered watch. It provides essential information on how to charge the watch by exposing the dial to light, change modes, set the time and calendar, check the power reserve, and receive time signals. The guide also details how to adjust settings for world time, summer time, and other specific functions.
Read onlineCitizen U680 specifications
| Power Source | Solar-powered |
|---|---|
| Signal Reception Time | 2:00 AM |
| Time Zones | 44 areas and UTC |
| Signal Reception Duration | 2-15 minutes |
All Citizen U680 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I charge the watch?
Expose the dial to light and use it sufficiently charged.
When does the watch receive time signals?
The watch receives the time signal at 2:00 AM every day.
How do I perform automatic radio signal reception?
The watch automatically receives radio signals at 2 a.m., 3 a.m. and 4 a.m.; you can enable or disable this function by setting the mode to “CAL”, “TME” or “RX‑S”.
From: CITIZEN Eco-Drive Global Radio Controlled Watch Cal.U680 Model No. JY80XX Manual
How can I manually correct the time?
Pull the crown to the first position, rotate it to the “TME” (time) mode, then use the A and B buttons to adjust hours, minutes and seconds as needed.
From: CITIZEN Eco-Drive Global Radio Controlled Watch Cal.U680 Model No. JY80XX Manual