1. Úvod
This manual provides essential information for the setup, operation, and maintenance of your RockJam 49 Key USB Keyboard Piano, Model RJ490BB. Designed for beginners and intermediate players, this compact digital piano offers a wide range of features to enhance your musical journey. It includes 200 tones, 200 rhythms, 50 demo tracks, and convenient record and playback functionality. With versatile connectivity options and integrated learning tools, the RockJam RJ490BB is an ideal instrument for exploring music.

Obrázek 1: Přední strana view of the RockJam 49 Key USB Keyboard Piano.
2. Obsah balení
Ujistěte se prosím, že balení obsahuje všechny položky:
- RockJam 49 Key USB Keyboard Piano (Model RJ490BB)
- Hudební odpočinek
- Napájecí kabel USB
- Samolepky na klavírní noty
- Návod k použití (tento dokument)
3. Nastavení
3.1 Napájení klávesnice
Klávesnici lze napájet dvěma způsoby:
- Napájení USB: Connect the provided USB cable to the DC 5V-2A port on the back of the keyboard and to a compatible USB power adapter (not included) or a computer's USB port.
- Napájení baterie: Insert 4 x AA batteries (not included) into the battery compartment on the underside of the keyboard. Ensure correct polarity.
3.2 Připevnění notového stojánku
Locate the slots on the top panel of the keyboard. Insert the music rest into these slots until it is securely in place. This provides a stable platform for sheet music or a tablet.
3.3 Applying Keynote Stickers
For beginners, the included piano note stickers can be applied to the white keys to help identify notes. Carefully peel each sticker and align it with the corresponding key, ensuring it adheres smoothly. These stickers are designed to be removable.
4. Návod k obsluze
4.1 Zapnutí/vypnutí
Stiskněte tlačítko MOC button located on the top left of the control panel to turn the keyboard on or off.
4.2 Ovládání hlasitosti
Otočte velký OBJEM knob to adjust the master volume of the keyboard.

Figure 2: Power button and Volume knob.
4.3 Výběr tónů
The keyboard features 200 different tones. To select a tone:
- Stiskněte tlačítko TÓN tlačítko.
- Use the number pad (0-9) or the '+' and '-' buttons to enter the desired tone number. The selected tone number will appear on the digital display.
Refer to the tone list printed on the keyboard for available options, including Piano, Organ, Guitar, Bass, Strings, Brass, Synth, and various Sound Effects.

Figure 3: Tone and Rhythm selection lists.
4.4 Výběr rytmů
The keyboard includes 200 rhythms. To select a rhythm:
- Stiskněte tlačítko RYTMUS tlačítko.
- Use the number pad (0-9) or the '+' and '-' buttons to enter the desired rhythm number.
- Stiskněte START/STOP zahájit nebo ukončit rytmus.
Available rhythms include Pop, Dance, Samba, Tango, Country, and various traditional styles.
4.5 Nastavení tempa
While a rhythm or demo song is playing, use the TEMPO '+' and '-' buttons to increase or decrease the playback speed.

Figure 4: Tempo and Sync controls.
4.6 demo skladeb
The keyboard has 50 pre-recorded demo songs. Press the DEMO button to cycle through and play the demo songs. Press START/STOP pro zastavení přehrávání.
4.7 Záznam a přehrávání
Chcete-li nahrát svůj výkon:
- Stiskněte tlačítko REC tlačítko. Na displeji se zobrazí režim nahrávání.
- Play your desired melody on the keys.
- Stiskněte HRÁT poslechnout si váš nahraný výkon.
4.8 Effects (Sustain, Vibrato)
Aktivujte UDRŽTE button to prolong the sound of notes. Press the VIBRATO button to add a wavering effect to the notes.
4.9 Perkuse
Použijte vyhrazený POKLEP buttons to add drum and percussion sounds to your playing.

Figure 5: Control panel with tone, rhythm, and effect buttons.
5. Konektivita
The RockJam RJ490BB offers several ports for enhanced functionality:
- Jack pro sluchátka (3.5 mm): Connect headphones for private practice without disturbing others.
- Pomocný vstup (3.5 mm): Connect an external audio device (e.g., smartphone, MP3 player) to play along with your favorite songs.
- Vstup pro mikrofon (3.5 mm): Připojte mikrofon (není součástí balení) a zpívejte si s ním během hraní.
- USB port: Connect the keyboard to a computer for MIDI functionality, allowing use with music software.

Figure 6: Rear panel with USB, Mic, Aux, and Phones jacks.
6. Learning Resources
Your RockJam keyboard includes access to exclusive content designed to aid your learning:
- Simply Piano App: Unlock exclusive content from the Simply Piano IOS and Android application. This app provides interactive lessons, helping you learn fundamental piano techniques and play popular songs. Follow the instructions provided with your product to redeem your access.
- Keynote Stickers: As mentioned in the Setup section, these stickers are a visual aid for identifying notes on the keys, making it easier to follow sheet music and learn scales.
7. Údržba
Proper care will ensure the longevity of your keyboard:
- Čištění: Use a soft, dry cloth to wipe the surface of the keyboard. Avoid using abrasive cleaners, solvents, or waxes, as these can damage the finish.
- Skladování: Klávesnici skladujte na chladném a suchém místě mimo dosah přímého slunečního záření, extrémních teplot a vysoké vlhkosti.
- Péče o baterie: If using batteries, remove them if the keyboard will not be used for an extended period to prevent leakage and damage.
- Zacházení: Zabraňte pádu klávesnice na zem nebo jejímu vystavení silným nárazům.
8. Řešení problémů
Pokud narazíte na problémy s klávesnicí, podívejte se na následující běžná řešení:
- Žádný zvuk:
- Zkontrolujte úroveň hlasitosti.
- Ensure headphones are not plugged in if you intend to use the built-in speakers.
- Verify the power connection or battery status.
- Keys Unresponsive:
- Ujistěte se, že je klávesnice zapnutá.
- If certain keys on the left side are unresponsive, check if a 'finger' button or similar setting is activated, which might mute sections of the keyboard for specific modes. Deactivate it to restore full keyboard functionality.
- Problémy s napájením:
- If using USB power, try a different USB port or power adapter.
- Pokud používáte baterie, vyměňte je za nové.
For further assistance, please contact RockJam customer support.
9. Specifikace
| Funkce | Detail |
|---|---|
| Model | RJ490BB |
| Počet klíčů | 49 |
| Zdroj napájení | Battery Powered (4x AA), USB (DC 5V-2A) |
| Konektivita | USB, 3.5mm Headphone Jack, 3.5mm Aux Input, 3.5mm Microphone Input |
| Tóny | 200 |
| Rytmy | 200 |
| Demo písně | 50 |
| Speciální funkce | Built-In Speaker, Compact, Headphone Jack, Lightweight, Recording |
| Rozměry | 7.28 x 30.71 x 2.36 palce |
| Hmotnost položky | 4.4 liber (2 kilogramů) |
10. Záruka a podpora
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official RockJam website. You may also contact the manufacturer, PDT UK Ltd, for assistance.





