Citizen Caliber 9590: Advanced Digital Quartz Movement with Sports Timer Functions

The Citizen Cal. 9590 is a multifunction digital quartz movement engineered for precision, sports timing, and user-friendly versatility. With a wide range of built-in functions, this movement was designed for digital wristwatches catering to athletes, sports enthusiasts, and individuals seeking an accurate and durable everyday timekeeper.

Core Features

The 9590 is powered by a quartz crystal oscillator, vibrating at a standard 32,768 Hz, which ensures exceptional accuracy and low power consumption. Its LCD digital display allows the user to navigate through a rich feature set, including:

• Standard Time Display

• Daily Alarm

• Pace Setter (metronome)

• Target Timer

• Stopwatch

• Illumination Lamp

• 12/24-Hour Format Switching

These features are designed with athletic applications in mind—especially the pace setter and target timer, which aid in interval training and goal-based performance monitoring.

Design and Display

• Case Diameter: 27.0 mm

• Thickness: 4.98 mm

• Display Type: Liquid Crystal (LC)

• Illumination: Built-in backlight lamp

Despite its wide functionality, the 9590 maintains a compact profile. The screen layout is optimized for legibility, with large segmented numerals and clear indicators. The light diffusing plate (Part No. 235-144) enhances visibility under different lighting conditions.

The illumination feature ensures readability in low-light environments, making this movement highly suitable for nighttime sports or outdoor use.

Internal Components and Structure

The 9590’s modular design supports easy service and parts replacement. Key components include:

• Power Cell: Part No. 280-204

• LC Display Panel: Part No. 281-803

• Display Panel Rubber Connector: Part No. 288-065

• Light Diffusing Plate: Part No. 235-144

• Power Cell Strap: Part No. 234-224

• Power Cell Insulator Sheet: Part No. 233-154

• Power Cell Connector Spring: Part No. 231-099

• Supporters for Plate and Display:

  • For LC Panel: Part No. 226-138

  • For Plate (I & II): Part Nos. 226-117 and 226-074

• Complete Plate Assembly: Part No. 750-818

• Buzzer Contact Spring: Part No. 903-058

These parts contribute to the movement’s reliability and allow straightforward disassembly for battery or LCD replacement, which is crucial for service longevity.

Specialized Sports Functions

The 9590 includes two uncommon but highly valuable features in the realm of sports timing:

• Pace Setter: Emits audible beeps at set intervals to help athletes maintain a specific rhythm. Ideal for runners, swimmers, or anyone training with timing intervals.

• Target Timer: A countdown timer used to hit a defined performance goal or exercise duration. The buzzer sounds upon reaching the target.

These features are typically found in high-end sports watches, reinforcing the 9590’s orientation toward functionality and user performance.

Application and Use Case

The Citizen 9590 is best suited for:

• Digital sport watches

• Timer and alarm watches for athletes

• Outdoor adventure and training tools

Thanks to its compact size and user-friendly interface, it is equally functional in daily urban wear.

Durability and Maintenance

This movement is built for long-term reliability, with attention to mechanical stability and energy efficiency. It requires minimal maintenance outside of periodic battery replacement and occasional LCD cleaning or replacement. The buzzer and illumination system are generally robust, though over time, the connector rubber or buzzer spring may need replacement for optimal performance.

Conclusion

The Citizen Cal. 9590 is a prime example of Citizen’s innovation in digital watch technology. It offers a robust set of sports-centric timing functions within a sleek, easily serviceable package. Whether for athletes or everyday users needing reliable alarms and timers, this movement delivers a dependable experience with the precision of quartz engineering.