1. Introducció
The JOYO JT-09 is a highly sensitive digital clip-on tuner designed for a wide range of string instruments. It features a clear LCD display, multiple tuning modes, and a compact, rotatable design for optimal viewing. This manual provides essential information for the proper setup, operation, and maintenance of your JT-09 tuner.

Figure 1: JOYO JT-09 Digital Clip-on Tuner
2. Contingut del paquet
Si us plau, comproveu el paquet per veure si hi ha els elements següents:
- 1 x JOYO JT-09 Guitar Tuner
- 1 x Manual d'usuari
Note: A CR2032 button battery is required for operation and is not included in the package due to logistical constraints.
3. Configuració
3.1 Instal·lació de la bateria
- Locate the battery compartment on the back of the tuner unit.
- Unscrew the captive panel screw to open the battery cover. The screw is designed not to fall off completely, ensuring better protection and ease of use.
- Insert one CR2032 button battery with the positive (+) side facing upwards.
- Tanqueu la tapa de la bateria i premeu el cargol.

Figure 2: Battery compartment with captive screw for easy installation.
3.2 Attaching to Instrument
The JT-09 tuner features a high-quality rubber clamp designed to securely attach to your instrument's headstock without causing damage. The unit is highly adjustable for optimal viewing:
- Rotació: The tuner can rotate 360 degrees horizontally.
- Inclinació: The display can be tilted up to 135 degrees vertically.

Figure 3: Adjustable clip for optimal viewangle de ing.
4. Instruccions de funcionament
4.1 Engegada/Apagada i Selecció de Mode
Locate the Power/Mode button on the front of the tuner unit (see Figure 4).
- Encès/apagat: Long press the Power/Mode button to turn the unit ON or OFF.
- Selecció del mode: Short press the Power/Mode button to cycle through the available tuning modes: Chromatic (C), Guitar (G), Bass (B), Violin (V), Ukulele C (Uc), and Ukulele D (Ud).

Figure 4: Power/Mode button and rubber clamp detall.
4.2 Afinar l'instrument
Once the tuner is clipped onto your instrument and powered on, select the appropriate tuning mode. Pluck a single string on your instrument. The tuner will detect the note and display it on the LCD screen.
- Pis: If the note is flat, the display will be blue, and the needle will point to the left. Tighten the string until the needle moves to the center.
- En sintonia: When the note is in tune, the display will turn green, and the needle will be centered.
- Sharp: If the note is sharp, the display will be blue, and the needle will point to the right. Loosen the string until the needle moves to the center.

Figure 5: Visual indicators for tuning status.
The JT-09 is compatible with the following instruments and modes:
- Chromatic (C): For general tuning of any instrument.
- Guitar (G): Standard guitar tuning.
- Bass (B): Standard bass guitar tuning.
- Violin (V): Standard violin tuning.
- Ukulele C (Uc): Standard ukulele tuning (4G 3C 2E 1A).
- Ukulele D (Ud): Ukulele tuning boosted a full tone from standard (4A 3D 2F# 1B).

Figure 6: The JT-09 tuner can be applied to various instruments.
4.3 Apagada automàtica
To conserve battery life, the JT-09 tuner will automatically shut down after 5 minutes of inactivity.
5. Manteniment
- Clean the tuner with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid exposing the tuner to extreme temperatures, humidity, or direct sunlight.
- Remove the battery if the tuner will not be used for an extended period to prevent battery leakage.
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El sintonitzador no s'encén. | La bateria està morta o mal instal·lada. | Replace the CR2032 battery or ensure it is installed with the correct polarity (+ side up). |
| Inaccurate tuning readings. | Tuner not securely clipped; excessive background noise; incorrect mode selected. | Ensure the tuner is firmly clipped to the headstock. Tune in a quiet environment. Verify the correct instrument mode (C, G, B, V, Uc, Ud) is selected. |
| La pantalla està tènue o parpelleja. | Bateria baixa. | Substituïu la bateria CR2032. |
7. Especificacions
| Característica | Detall |
|---|---|
| Dispositius compatibles | Cromàtica, Guitarra, Baix, Violí, Ukelele C, Ukelele D |
| Freqüència A4 | 440 Hz |
| Interval d’afinació | 0A (27.5Hz) - 8C (4186.01Hz) |
| Pes | 19 g |
| Dimensions (L*W*H) | 50 mm * 26 mm * 76 mm |
| Font d'alimentació | 1 x CR2032 Button Battery (not included) |
| Apagat automàtic | 5 minuts d'inactivitat |
8. Consells d'usuari
- For best accuracy, always clip the tuner directly onto the headstock of your instrument.
- Ensure you select the correct instrument mode (e.g., 'G' for guitar, 'Uc' for Ukulele C) to avoid incorrect readings.
- The automatic shut-off feature helps save battery life. Remember to turn off the tuner manually if you're done with a short session to ensure it doesn't stay on unnecessarily.
- The captive screw for the battery compartment is designed to stay attached to the cover, making battery changes easier and preventing loss of the screw.
9. Vídeo de demostració del producte
Watch this video for a visual guide on how to use your JOYO JT-09 tuner, including its rotatable clip and display features.
Video: JOYO JT-09 Tuner Product Demonstration
10. Garantia i Suport
For any questions or support regarding your JOYO JT-09 tuner, please refer to the seller's contact information or the official JOYO weblloc web. Conserveu el rebut de compra per a qualsevol reclamació de garantia.





