1. Introducció
Thank you for choosing the Cherub WST-500A Chromatic Tuner. This compact and versatile digital tuner is designed for accurate tuning of various musical instruments, including violin and guitar. It features multiple tuning modes to suit your needs. Please read this manual thoroughly to understand the tuner's functions and ensure optimal performance.
2. Informació de seguretat
To prevent damage to the device or injury to yourself or others, please observe the following safety precautions:
- Do not expose the tuner to extreme temperatures, direct sunlight, high humidity, or corrosive environments.
- Eviteu deixar caure l'afinador o sotmetre'l a impactes forts.
- Do not attempt to disassemble or modify the tuner. Refer all servicing to qualified personnel.
- Use only the specified battery type (2 x AAA batteries). Ensure correct polarity when installing batteries.
- Remove batteries if the tuner will not be used for an extended period to prevent leakage.
- Mantingueu les piles fora de l'abast dels nens. En cas d'ingestió, busqueu atenció mèdica immediata.
3. Producte acabatview
The Cherub WST-500A features a clear LCD display and intuitive controls for easy operation.

Figura 1: Frontal view of the Cherub WST-500A Chromatic Tuner, showing the display, control buttons, speaker, and microphone.
Controls i característiques:
- Pantalla LCD: Shows note name, tuning accuracy, and mode indicators.
- Botó ON/OFF: Powers the tuner on or off.
- AUTO/ITEM Button: Switches between Automatic tuning mode and specific instrument presets (Guitar, Violin).
- FLAT/SOUND Button: In tuning mode, adjusts flat settings. In sound mode, cycles through reference tones.
- Botó MANUAL: Activates Manual tuning mode.
- UP/DOWN Buttons (Manual): Used to select notes in Manual mode or adjust settings.
- Built-in Microphone (MIC): Detects instrument sound for tuning.
- Ponent: Emits reference tones in Sound mode.
- Stand: Integrated stand on the back for upright positioning.
4. Configuració
4.1 Instal·lació de la bateria
- Localitza el compartiment de la bateria a la part posterior del sintonitzador.
- Obriu la tapa del compartiment de la bateria.
- Insert two (2) AAA batteries, ensuring the correct positive (+) and negative (-) polarity as indicated inside the compartment.
- Tanqueu bé la tapa del compartiment de la bateria.
4.2 Engegada/apagada
- To turn the tuner ON, press the ON/OFF botó. La pantalla s'il·luminarà.
- To turn the tuner OFF, press and hold the ON/OFF botó durant aproximadament 2 segons.
5. Instruccions de funcionament
5.1 Modes d'afinació
The WST-500A offers three primary tuning modes:
- Mode automàtic: The tuner automatically detects the note being played. This is the default mode.
- Mode manual: Allows you to manually select the target note for tuning.
- Mode de so: The tuner plays a reference tone for you to tune by ear.
5.2 Chromatic Tuning (Automatic Mode)
- Turn on the tuner. It will typically start in Automatic Chromatic mode.
- Play a single note on your instrument. Hold the note steadily.
- The tuner's display will show the detected note name.
- Adjust your instrument until the needle on the display is centered and the indicator light turns green.
- If the needle is to the left, the note is flat; tighten the string. If the needle is to the right, the note is sharp; loosen the string.
5.3 Instrument Presets (Guitar/Violin)
The tuner includes specific presets for Guitar and Violin, which can simplify tuning for these instruments.
- Turn on the tuner.
- Premeu el botó AUTO/ITEM button repeatedly to cycle through the available instrument modes (Chromatic, Guitar, Violin). The selected instrument will be indicated on the display.
- In Guitar or Violin mode, play the desired string. The tuner will display the target note for that string and guide you to tune it.
- Tune your instrument until the display indicates the correct pitch (centered needle, green light).
5.4 Mode manual
Use Manual mode when you need to tune to a specific note or if the automatic detection is challenging.
- Turn on the tuner.
- Premeu el botó MANUAL button to enter Manual mode.
- Utilitza el UP i ABAIX buttons to select your desired target note.
- Play the corresponding note on your instrument and adjust until the display indicates accurate tuning.
5.5 Sound Mode
Sound mode provides an audible reference tone for tuning by ear.
- Turn on the tuner.
- Premeu el botó FLAT/SOUND button to enter Sound mode.
- Premeu el botó FLAT/SOUND button again to cycle through the available reference tones (e.g., A4, B4, C5).
- Listen to the reference tone and tune your instrument's corresponding string to match the pitch.

Figure 2: The Cherub WST-500A Tuner shown in a hand, illustrating its compact and portable design (approximately 3.9 inches / 9 cm in height).
6. Manteniment
Proper care will extend the life of your Cherub WST-500A tuner.
- Clean the tuner with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- If the tuner will not be used for an extended period, remove the batteries to prevent potential leakage and damage.
- Store the tuner in a cool, dry place away from direct sunlight and extreme temperatures.
7. Solució De Problemes
If you encounter issues with your tuner, refer to the following table:
| Problema | Causa possible | Solució |
|---|---|---|
| El sintonitzador no s'encén. | Piles gastades o instal·lades incorrectament. | Canvieu les piles per piles AAA noves, assegurant-vos de la polaritat correcta. |
| Inaccurate tuning readings. | Background noise, instrument not producing a clear tone, or incorrect mode. | Ensure a quiet environment. Play notes clearly and steadily. Verify the correct tuning mode (Chromatic, Guitar, Violin) is selected. Try Manual mode. |
| La pantalla està tènue o parpelleja. | Potència de bateria baixa. | Substituïu les piles. |
| No sound from speaker in Sound Mode. | Not in Sound Mode, or very low battery. | Press FLAT/SOUND button to enter Sound Mode. Replace batteries if necessary. |
8. Especificacions
- Rang d'ajust: Db (69.296Hz) - d3 (1174.66Hz)
- Modes d'afinació: Chromatic, Guitar, Violin
- Mètode de detecció: Micròfon
- Potència: 2 x piles AAA
- Dimensions: Aproximadament 5.8 x 2.7 x 0.9 polzades (14.7 x 6.9 x 2.3 cm)
- Pes: Approximately 3.2 ounces (90 grams) (without batteries)
9. Garantia i Suport
Cherub products are manufactured to high-quality standards. For specific warranty information, please refer to the warranty card included with your purchase or contact your local Cherub distributor or retailer. For technical support or further inquiries, please visit the official Cherub weblloc o poseu-vos en contacte amb el seu departament d'atenció al client.
Si us plau, conserveu el comprovant de compra per a qualsevol reclamació de garantia.





