Miyota OS60 Quartz Watch Movement Instruction Manual

1. Introduction

This manual provides essential information for the proper handling, installation, operation, and maintenance of your new Miyota OS60 Quartz Watch Movement. The Miyota OS60 is a high-quality, original Japanese quartz movement designed for reliable timekeeping and date display. Please read these instructions carefully before proceeding with any work on the movement.

2. Product Overview

The Miyota OS60 is a robust quartz movement featuring timekeeping functions (hours, minutes, seconds) and a date display. It is powered by a single button-cell battery.

Figure 1: Front view of the Miyota OS60 movement, showing the date wheel and stem.

Figure 2: Back view of the Miyota OS60 movement, indicating the battery compartment and movement markings.

3. Setup and Installation

Installation of a watch movement requires specialized tools and expertise. It is highly recommended that installation be performed by a qualified watchmaker or professional.

3.1 Handling Precautions

• Always handle the movement with clean, non-magnetic tweezers or finger cots to prevent damage and contamination.
• Avoid touching the circuit board or coils directly.
• Work in a clean, dust-free environment.
• Do not expose the movement to strong magnetic fields.

3.2 Installation Steps (Professional Recommended)

1. Prepare the Watch Case: Ensure the watch case is clean and free of dust.
2. Insert the Movement: Carefully place the Miyota OS60 movement into the watch case.
3. Secure the Movement: Use appropriate movement clamps or screws to secure the movement within the case.
4. Install the Stem/Crown: Gently insert the winding stem with the crown attached into the movement's stem tube. Ensure it clicks into place.
5. Fit the Hands: Carefully press the hour, minute, and second hands onto their respective pinions. Ensure they are parallel and do not touch each other or the dial.
6. Install the Dial: If not already attached, secure the dial to the movement.
7. Close the Case: Once all components are in place and functioning correctly, close the watch case back.

4. Operating Instructions

The Miyota OS60 movement operates like most standard quartz watches with a date function.

4.1 Setting the Time

1. Pull the crown out to the second click position (farthest out).
2. Turn the crown to move the hands clockwise or counter-clockwise until the desired time is set.
3. Push the crown back to the normal position to start the watch.

4.2 Setting the Date

1. Pull the crown out to the first click position.
2. Turn the crown (usually clockwise) to advance the date until the correct date is displayed.
3. Push the crown back to the normal position.

Note: Avoid setting the date between 9:00 PM and 3:00 AM, as this can interfere with the automatic date change mechanism and potentially damage the movement.

5. Maintenance

5.1 Battery Replacement

The Miyota OS60 movement uses a SR920SW button-cell battery. When the watch stops or the second hand starts skipping (End-of-Life indicator), the battery needs to be replaced.

1. Open the watch case back.
2. Carefully locate the battery compartment (refer to Figure 2).
3. Gently remove the old battery using a non-metallic tool to avoid short-circuiting.
4. Insert a new SR920SW battery with the positive (+) side facing up.
5. Ensure the battery is securely seated.
6. Close the watch case back.

Caution: Battery replacement should ideally be performed by a professional watchmaker to avoid damaging the movement or compromising the watch's water resistance.

5.2 General Care

• Keep the watch away from extreme temperatures, direct sunlight, and strong magnetic fields.
• Avoid exposing the watch to sudden impacts or vibrations.
• If the watch is water-resistant, ensure the crown is always pushed in completely to maintain its water resistance.

6. Troubleshooting

If you encounter issues with your watch, consider the following common problems:

6.1 Watch Not Running

• Battery: The battery may be depleted. Replace it with a new SR920SW battery.
• Crown Position: Ensure the crown is fully pushed in to the normal operating position.
• Impact: A severe impact might have dislodged internal components.

6.2 Incorrect Time/Date

• Setting Procedure: Review the operating instructions for setting the time and date.
• Crown Position: Ensure the crown is fully pushed in after setting.

6.3 Other Issues

For any issues beyond simple battery replacement or time/date setting, it is strongly recommended to consult a professional watchmaker. Attempting complex repairs without proper tools and knowledge can cause irreversible damage to the movement.

7. Specifications

8. User Tips

• Compatibility: When replacing an existing movement, always verify the dimensions and stem height of the OS60 against your watch case to ensure proper fit and hand clearance.
• Japanese Quality: The Miyota OS60 is a Japanese-made movement, known for its reliability and precision, making it a preferred choice over some other origins for many watch enthusiasts.
• Professional Installation: Due to the delicate nature of watch movements, professional installation is always recommended to prevent damage and ensure optimal performance.

9. Warranty and Support

As this is a watch movement component, specific warranty terms may vary depending on the seller and the final assembled product. For any issues or defects with the movement upon receipt, please contact your point of purchase immediately.

Miyota movements are renowned for their quality and durability. Proper installation and care will ensure a long lifespan for your watch.