Introduction
Thank you for purchasing the PRUNUS J-328 Portable FM Radio. This compact and versatile device offers FM radio reception, TF card playback, and recording capabilities. This manual provides essential information for proper setup, operation, and maintenance of your radio. Please read it thoroughly before use.
Product Overview
Figure 1: Front view of the PRUNUS J-328 Portable FM Radio, showcasing its compact red design, digital display, and control buttons.
Included Components:
- PRUNUS J-328 Radio Unit
- Charging Cable
- User Manual (this document)
Setup
1. Charging the Battery
The radio is equipped with a built-in rechargeable battery. Connect the provided charging cable to the radio's charging port and a compatible USB power source (e.g., computer USB port, USB wall adapter). The LED indicator will show charging status. Ensure the radio is fully charged before first use for optimal battery life.
2. Inserting a TF Card
To use the recording or MP3 playback functions, insert a TF (MicroSD) card into the designated slot on the radio. Ensure the card is inserted correctly until it clicks into place.
3. Powering On/Off
Locate the ON/OFF switch on the radio. Slide the switch to the 'ON' position to power on the device. Slide it to 'OFF' to power off.
Operating Instructions
1. FM Radio Operation
Figure 2: The radio display showing FM frequency and buttons for automatic station search and direct frequency input.
- Automatic Station Search and Save: In FM mode, press and hold the 'SCAN' button for 3 seconds. The radio will automatically search for available FM channels, save them, and assign a channel number.
- Direct Frequency Input: To tune to a specific frequency, use the numeric keypad to enter the desired frequency (e.g., 905 for 90.5 MHz).
- Switching Between Saved Stations: Use the 'Previous' (◀◀) and 'Next' (▶▶) buttons to navigate through saved stations.
- Volume Control: Adjust the volume using the dedicated volume control knob or buttons (refer to device layout for exact location).
- Headphone Use: For private listening, plug 3.5mm headphones into the headphone jack.
2. Recording Function
Figure 3: The radio displaying the recording timer, with the 'REC' button indicating active recording.
- FM Recording: Ensure a TF card is inserted. While listening to an FM station, press the 'REC' button to start recording the broadcast. Press 'REC' again to stop.
- Music Recording: The device supports recording from external sources via AUX input or internal audio. Refer to the device interface for specific recording options.
3. MP3 Playback (TF Card)
With a TF card containing MP3 audio files inserted, the radio can function as an MP3 player. Use the 'MODE' button to switch to TF card playback mode. Use the 'Previous' (◀◀) and 'Next' (▶▶) buttons to navigate tracks.
4. AUX Input
Connect an external audio device (e.g., smartphone, MP3 player) to the radio's AUX port using a 3.5mm audio cable. Switch the radio to AUX mode using the 'MODE' button to play audio from the connected device through the radio's speaker.
Features
Figure 4: Icons illustrating the radio's compatibility with FM radio reception, TF card playback, and AUX input for various audio sources.
- High Sensitivity Reception: Equipped with a DSP chip, the radio offers enhanced reception and a stable signal for FM broadcasts (76-108MHz).
- Clear Sound Quality: The integrated speaker delivers clear audio. The 3.5mm headphone jack allows for stereo sound with compatible headphones.
- Portability: With dimensions of 47x16x92mm and a weight of approximately 70g, this pocket-sized radio is lightweight and easy to carry, ideal for various indoor and outdoor activities. A strap is included for convenience.
- Hidden Antenna: The radio features a portable hidden antenna for a sleek and compact design.
Figure 5: The compact size of the PRUNUS J-328 radio, shown with its dimensions and compared to a credit card for scale.
Figure 6: A hand holding the PRUNUS J-328 radio, illustrating its portability and the integrated strap, which also houses the hidden antenna.
Specifications
| Feature | Specification |
|---|---|
| Model Number | J-328 |
| Brand | PRUNUS |
| Tuner Type | FM (76-108MHz) |
| Display Type | LCD |
| Power Source | Battery Powered (Rechargeable) |
| Connectivity | AUX Input, TF Card Slot |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Dimensions (L x W x H) | 47mm x 16mm x 92mm |
| Product Weight | 70 grams |
| Features | Portable, Rechargeable, Lightweight, FM Recording, Music Recording |
Maintenance
- Cleaning: Use a soft, dry cloth to clean the radio's exterior. Avoid using abrasive cleaners or solvents.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the radio regularly, even if not in use for extended periods.
- Storage: Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
Troubleshooting
- No Power: Ensure the battery is charged. Check the ON/OFF switch is in the 'ON' position.
- Poor FM Reception: Extend the antenna fully. Try moving to a different location. Perform an automatic station search to rescan channels.
- No Sound: Check the volume level. Ensure headphones are properly connected if in use, or disconnected if using the speaker.
- TF Card Not Detected: Ensure the TF card is inserted correctly. Try reinserting the card. Verify the card is not damaged or corrupted.
- Recording Not Working: Ensure a TF card is inserted and has sufficient free space.
Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty details, please refer to the documentation provided at the time of purchase or contact PRUNUS customer support. If you encounter any issues not covered in this manual, please reach out to the retailer or manufacturer for assistance.
