Casio SF-5580/5780/5980 Digital Diary Owner’s Manual

About this manual

This manual introduces the Casio SF-5580/5780/5980 Digital Diary, covering safety guidelines, FCC compliance, and initial setup steps such as loading two batteries, resetting the unit, and setting the home time. It also explains power‑on/off procedures and basic precautions for battery maintenance.

The guide details the device’s functions, including the function menus, time and calendar modes, expense manager, various conversion tools, and built‑in games like poker and blackjack. Additional sections cover data entry, display settings, alarm features, and troubleshooting tips.

What's inside

• Getting Started
• Power On/Off
• Home Time Setup
• Function Menus
• Calendar Mode
• Expense Manager Mode
• Games
• Calculator Mode

Frequently asked questions

How do I reset the Digital Diary for first use?

Press the RESET button on the back of the Digital Diary, then select Y and press OK to reset the unit.

What should I do if nothing appears on the display when I turn on the unit?

Replace the main batteries and press the RESET button to resume normal operation.

How often should I turn on the unit to check the battery condition?

Turn on the unit at least once a month to check the current condition of the batteries.