EMB Professional DJR20 1U Single USB/SD Digital Player & Recorder Rack Mount User Manual

1. Introduction

This user manual provides detailed instructions for the installation, operation, and maintenance of your EMB Professional DJR20 1U Single USB/SD Digital Player & Recorder Rack Mount. Please read this manual thoroughly before using the device to ensure proper functionality and to prevent damage.

2. Safety Information

• Ensure the device is connected to a power source with the correct voltage as specified.
• Do not expose the unit to rain, moisture, dripping, or splashing.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way.

3. Package Contents

Verify that all items listed below are included in your package:

• EMB Professional DJR20 Unit
• Power cable
• USB cable
• SD card slot (Note: SD card not included)
• RCA Audio Cables

4. Product Overview

4.1. Front Panel

Image 1: Front view of the EMB Professional DJR20. This image displays the front panel of the DJR20 unit, featuring the power switch, USB and SD card slots, a digital display, and various control buttons for playback, recording, and track selection. A headphone jack with volume control is also visible on the right side.

• Power Switch: Toggles the unit on/off.
• USB Port: For connecting USB storage devices.
• SD Card Slot: For inserting SD/MMC memory cards.
• Digital Display: Shows track information, time, and mode.
• Control Buttons: Play, Pause, Stop, Record, Rewind, Forward, Delete, Repeat, +10 Track, Folder/Total Random Play.
• Headphone Output: 1/4-inch jack with dedicated volume control for monitoring audio.
• Rec Level Control: Adjusts the input level for recording.

4.2. Rear Panel

Image 2: Rear view of the EMB Professional DJR20. This image shows the rear panel of the DJR20 unit, highlighting the RCA input and output jacks, the AC power inlet, and product information labels. The included power cable and RCA audio cables are also displayed.

• Line Input (RCA): Connect external audio sources for recording.
• Line Output (RCA): Connect to an amplifier, mixer, or other audio equipment.
• AC Power Inlet: For connecting the power cable.

5. Setup

5.1. Rack Mounting

The DJR20 is designed for standard 1U (1HE) rack mounting. Secure the unit into a 19-inch equipment rack using appropriate rack screws (not included) through the mounting ears on both sides of the front panel.

5.2. Power Connection

1. Ensure the power switch on the front panel is in the OFF position.
2. Connect the included power cable to the AC Power Inlet on the rear panel of the DJR20.
3. Plug the other end of the power cable into a suitable AC power outlet.

5.3. Audio Connections

1. Output: Connect the RCA Line Output jacks on the rear panel of the DJR20 to the input of your amplifier, mixer, or powered speakers using RCA audio cables.
2. Input (for Recording): To record from an external source, connect the RCA Line Input jacks on the rear panel of the DJR20 to the output of your audio source (e.g., mixer, CD player).

5.4. Media Insertion

1. USB: Insert your USB flash drive into the USB port on the front panel.
2. SD Card: Insert your SD or MMC memory card into the SD card slot on the front panel until it clicks into place.

6. Operating Instructions

6.1. Power On/Off

Flip the Power Switch on the front panel to the ON position to power on the unit. The digital display will illuminate. Flip it to the OFF position to power off.

6.2. Playback (USB/SD)

1. Insert a USB drive or SD card containing MP3 audio files. The unit will automatically detect the media and begin playback.
2. Press the PLAY/PAUSE button to start or pause playback.
3. Use the REWIND and FORWARD buttons to skip between tracks.
4. Press the +10 TRACK button for fast track selection, advancing by 10 tracks at a time.
5. Press the FOLDER button to navigate through folders on your media.
6. Press the RANDOM PLAY button to toggle between Folder Random Play and Total Random Play.
7. Press the REPEAT button to cycle through repeat modes (e.g., repeat one, repeat all, repeat folder).

6.3. Recording (Line Record Function)

The DJR20 allows recording of external audio sources directly to a USB drive or SD card in MP3 format (128 kbps).

1. Connect your audio source to the Line Input (RCA) on the rear panel.
2. Insert a USB drive or SD card with sufficient free space.
3. Adjust the REC LEVEL CONTROL on the front panel to set the input recording volume. Monitor the input level on the display to avoid clipping.
4. Press the RECORD button to begin recording. The display will indicate recording status.
5. Press the STOP button to end the recording. The recorded file will be saved to your USB drive or SD card.

6.4. Copy Function (USB to SD / SD to USB)

The unit supports direct copying of files between a USB drive and an SD card.

1. Ensure both a USB drive and an SD card are inserted into the unit.
2. Press and hold the COPY button. Follow the on-screen prompts to select the source and destination for the copy operation.

6.5. Headphone Output

Connect headphones to the 1/4-inch headphone jack on the front panel. Adjust the dedicated HEADPHONE VOLUME knob to control the monitoring level.

6.6. Output Selection (A/B/Mix)

The DJR20 features selectable output modes. Refer to the unit's display and controls to switch between output options (A, B, or Mix) if available, allowing for flexible routing of audio signals.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or solvents.
• Storage: When not in use for extended periods, store the unit in a cool, dry place away from direct sunlight and extreme temperatures.
• Ventilation: Ensure adequate ventilation around the unit to prevent overheating.

8. Troubleshooting

9. Specifications

10. Warranty and Support

For warranty information and technical support, please refer to the documentation included with your purchase or visit the official EMB Professional website. Keep your proof of purchase for any warranty claims.

For further assistance, you may contact the seller or manufacturer directly. Contact details are typically provided on the product packaging or in the included documentation.

11. Product Video Overview

Watch this video for a closer look at the EMB Professional DJR20 and its features: