1. Introduction
The McGrey BK-4910BK is a compact 49-key electronic keyboard designed for beginners. It offers a versatile range of sounds and rhythms, along with educational features to support musical learning. This manual provides essential information for setting up, operating, and maintaining your keyboard.
2. Package Contents
Please check that all items are present in the package:
- McGrey BK-4910BK 49-Key Keyboard
- Microphone
- Music Stand (removable)
- Power Adapter (or option for batteries)
3. Setup
3.1 Powering the Keyboard
The keyboard can be powered using the included AC power adapter or by batteries (not included). For battery operation, locate the battery compartment on the underside of the keyboard and insert the required batteries (typically AA or D, refer to the compartment label for exact type and quantity).

Image: The McGrey BK-4910BK keyboard illustrating its power options, including the AC adapter input and the battery compartment on the underside.
3.2 Connecting the Microphone and Headphones
Connect the included microphone to the MIC input jack on the keyboard. If you wish to practice silently, connect headphones to the HEADPHONE OUT jack. Both jacks are typically located on the rear panel of the keyboard.

Image: A close-up view of the rear panel of the McGrey BK-4910BK keyboard, showing the input ports for the microphone, headphones, and power adapter.
3.3 Attaching the Music Stand
The removable music stand can be inserted into the designated slots on the top panel of the keyboard to hold sheet music or a tablet.

Image: The McGrey BK-4910BK keyboard with its detachable music stand in place, ready to hold sheet music.
4. Operating Instructions
4.1 Power On/Off and Volume Control
Press the POWER button to turn the keyboard on or off. Adjust the overall volume using the VOLUME UP and VOLUME DOWN buttons or the dedicated volume knob, if present.
4.2 Selecting Sounds (Tones)
The keyboard features 16 different sounds. Use the TIMBRE A and TIMBRE B buttons to cycle through the available instrument sounds such as Piano, Organ, Guitar, and more. The selected sound number will typically be displayed on the digital screen.
4.3 Choosing Rhythms
Select from 10 built-in rhythms by pressing the RHYTHM buttons. These include various styles like Disco, Rock, Waltz, and more. You can adjust the tempo of the rhythm using the TEMPO control buttons.
4.4 Percussion Sounds
The keyboard includes 8 percussion sounds. These can often be triggered by specific keys or dedicated percussion pads on the control panel, allowing you to add drum and percussion effects to your music.
4.5 Demo Songs and Learning Functions
The keyboard comes with 6 demo songs. Press the DEMO button to play through these pre-recorded melodies. For learning, utilize the ONE KEY and GUIDE modes. The ONE KEY function allows you to play along with a demo song by pressing any key, while the GUIDE function often provides visual cues or prompts to help you learn specific notes.

Image: A detailed view of the McGrey BK-4910BK control panel, highlighting the 'ONE KEY' button, which activates a learning function for playing along with demo songs.

Image: A close-up of the McGrey BK-4910BK's control panel, displaying the various buttons for selecting different sounds (timbres) and rhythms.
5. Maintenance and Care
To ensure the longevity and optimal performance of your McGrey BK-4910BK keyboard, follow these care guidelines:
- Cleaning: 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.
- Storage: Store the keyboard in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. If storing for an extended period, remove the batteries to prevent leakage.
- Handling: Handle the keyboard with care. Avoid dropping it or subjecting it to strong impacts.
- Power: Always use the specified power adapter. Disconnect the power adapter when not in use or during electrical storms.
6. Troubleshooting
If you encounter any issues with your keyboard, please refer to the following common problems and solutions:
- No Power: Ensure the power adapter is securely connected to both the keyboard and a working power outlet. If using batteries, check that they are correctly inserted and not depleted.
- No Sound: Check the volume level. Ensure headphones are not connected if you expect sound from the speakers. Verify that a sound (Timbre) is selected.
- Keys Not Responding: If only certain keys are not responding, try gently cleaning around the keys. If the entire keyboard is unresponsive, try turning it off and on again.
- Distorted Sound: Reduce the volume. Ensure the microphone is not too close to the speakers, causing feedback.
If the problem persists after attempting these solutions, please contact McGrey customer support for further assistance.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | McGrey |
| Model Name | BK-4910 |
| Number of Keys | 49 |
| Sounds (Tones) | 16 |
| Rhythms | 10 |
| Percussion Sounds | 8 |
| Demo Songs | 6 |
| Special Features | Portable, Learning Functions (One-Key, Guide) |
| Connectivity | Microphone Input, Headphone Output |
| Power Source | AC Adapter or Batteries |
| Dimensions | 80 x 30 x 13 cm |
| Weight | 2.55 kg |
| Color | Black |
8. Warranty and Support
Your McGrey BK-4910BK keyboard is covered by a standard manufacturer's warranty. For specific warranty details, including duration and coverage, please refer to the documentation provided with your purchase or visit the official McGrey website. For technical support, spare parts, or service inquiries, please contact McGrey customer service through their official channels.