Cherub WST-551C Rechargeable Clip-on Guitar Tuner Instruction Manual

1. Introduction

The Cherub WST-551C is a compact, lightweight, and highly accurate clip-on tuner designed for various musical instruments. It features a bright LED display for clear visibility in diverse lighting conditions and a built-in high-sensitive piezo sensor for precise tuning. With its rechargeable Li-ion battery and simple two-button operation, the WST-551C offers effortless and reliable tuning for all musicians.

2. Key Features

• Compact and Lightweight Design: Easy to carry and attach to your instrument.
• Intuitive Two-Button Operation: Simplifies everyday tuning tasks.
• Clear and Bright LED Display: Ensures easy readability of tuning indications, even in dimly lit environments.
• High-Sensitive Piezo Sensor: Provides accurate and ultra-responsive tuning.
• Adjustable Reference Pitch: Allows customization of the A4 reference frequency.
• Rechargeable Li-ion Battery: Offers approximately 150 minutes of battery life and recharges via USB-C.

3. Package Contents

Verify that all items are present in your package:

• Cherub WST-551C Clip-on Tuner
• USB-C Charging Cable
• User Manual (this document)

4. Setup

4.1 Attaching the Tuner

1. Gently open the clip of the WST-551C tuner.
2. Attach the tuner securely to the headstock of your instrument. Ensure the clip has a firm grip without damaging the instrument's finish.
3. Adjust the display angle for optimal viewing. The tuner's head can swivel to provide a clear line of sight.

Figure 1: Cherub WST-551C tuner attached to a guitar headstock.

4.2 Powering On/Off

• To power on, press and hold the power button (marked with a power symbol) located on the back of the tuner.
• To power off, press and hold the power button again.

Figure 2: Rear view of the tuner with control buttons.

5. Operating Instructions

5.1 Selecting Tuning Mode

The WST-551C offers multiple tuning modes for different instruments. Press the 'A4' button (or mode button) on the back of the tuner repeatedly to cycle through the available modes:

• Chromatic (C): For all instruments.
• Guitar (G): For standard guitar tuning.
• Bass (B): For bass guitar tuning.
• Violin (V): For violin tuning.
• Ukulele (U): For ukulele tuning.

5.2 Tuning Your Instrument

1. Ensure the tuner is powered on and the correct tuning mode is selected.
2. Pluck a single string on your instrument. The tuner will detect the note and display it on the screen.
3. The LED display will indicate whether the note is flat (left side of the display), sharp (right side of the display), or in tune (center of the display, usually green).
4. Adjust your instrument's tuning peg until the display shows the correct note and the indicator is centered and green.

Figure 3: Tuner display indicating an in-tune note.

5.3 Adjusting Reference Pitch (A4)

The reference pitch (A4) can be adjusted from 435Hz to 445Hz. To change the A4 value, press and hold the 'A4' button until the A4 value starts blinking. Then, press the 'A4' button repeatedly to adjust the value. Release the button to set the new reference pitch.

6. Charging the Battery

The Cherub WST-551C is equipped with a rechargeable Li-ion battery. When the battery is low, the battery indicator on the display will show a low battery icon.

• Connect the included USB-C cable to the charging port on the tuner.
• Plug the other end of the USB-C cable into a compatible USB power adapter (not included) or a computer's USB port.
• The battery indicator will show charging status. Once fully charged, the indicator will change to a full battery icon.
• A full charge provides approximately 150 minutes of continuous use.

Figure 4: Connecting the USB-C charging cable.

7. Maintenance

• Keep the tuner clean by wiping it with a soft, dry cloth.
• Avoid exposing the tuner to extreme temperatures, moisture, or direct sunlight.
• Do not attempt to disassemble or repair the tuner yourself, as this will void the warranty.

8. Troubleshooting

• Tuner does not power on: Ensure the battery is charged. Connect the USB-C cable to charge the device.
• Inaccurate tuning: Verify that the correct tuning mode (e.g., Guitar, Bass, Chromatic) is selected for your instrument. Ensure the tuner is securely clipped to the headstock.
• Display is dim or unresponsive: The battery may be low. Recharge the tuner.

9. Specifications

10. Warranty and Support

For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official Cherub product website. Keep your proof of purchase for any warranty claims.