Introduction
The Boytone BT-28MB is a versatile classic-style stereo system designed to play various audio formats. It features a record player, AM/FM radio, CD player, cassette player, and offers modern connectivity options like Bluetooth, USB, and SD card slots. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.

Figure 1: Boytone BT-28MB Multi-Function Stereo System with separate speakers.
Package Contents
- Boytone BT-28MB Main Unit
- 2 Separate Stereo Speakers
- 45 RPM Adapter
- Remote Control
- User Manual (this document)
Setup Instructions
- Unpacking: Carefully remove all components from the packaging. Retain packaging for future transport or storage.
- Speaker Connection: Connect the two separate stereo speakers to the main unit using the provided speaker wires. Ensure correct polarity (positive to positive, negative to negative) for optimal sound.
- Power Connection: Plug the power cord into a standard electrical outlet.
- Placement: Place the main unit and speakers on a stable, flat surface away from direct sunlight, heat sources, and excessive dust or moisture. Ensure adequate ventilation around the unit.

Figure 2: Rear panel connections for speakers.
Operating Instructions
General Controls

Figure 3: Main control panel and turntable.
- Power On/Off: Press the Power button to turn the unit on or off. The Power Indicate with Red Light will illuminate when on.
- Function Select: Use the Function Select knob or buttons to switch between PHONO (Turntable), FM/AM Radio, CD, Cassette, USB/SD, and AUX-in modes.
- Volume Control: Adjust the Volume knob to increase or decrease the sound level.
- Remote Control: The included remote control provides convenient access to various functions.
Turntable Operation (PHONO)
- Record Placement: Open the dust cover. Place a vinyl record on the turntable platter. For 45 RPM records, use the included 45 RPM adapter.
- Speed Selection: Select the appropriate speed (33/45/78 RPM) using the speed selector switch.
- Playing a Record: Gently lift the tone arm using the cue lever. Position the stylus over the desired track on the record. Slowly lower the tone arm using the cue lever. The record will begin to play.
- Stopping Playback: Lift the tone arm using the cue lever and return it to the tone arm rest.
- Auto-Stop Feature: The unit may have an auto-stop feature that stops the platter when the record finishes.
AM/FM Radio Operation
- Select Mode: Switch the Function Select to FM or AM.
- Tuning: Use the Tuning knob to manually tune to your desired radio station.
- Antenna: For FM, extend the FM wire antenna at the back of the unit for better reception. For AM, rotate the unit for optimal reception.
CD Player Operation
- Insert CD: Gently insert a CD into the CD slot with the label side facing up. The unit will automatically load the CD.
- Playback: Playback will typically begin automatically. Use the Play/Pause, Skip, and Stop buttons for control.
- MP3 & WMA Playback: The CD player supports MP3 and WMA playback from compatible discs.
Cassette Tape Player Operation
- Insert Cassette: Open the cassette door and insert a cassette tape.
- Playback: Press the Play button to begin playback. Use the Rewind, Fast Forward, Stop/Eject, and Pause buttons for control.
Bluetooth Connectivity
The unit supports wireless connection to play music from your phone, tablet, or other Bluetooth-enabled devices.

Figure 4: Bluetooth connectivity feature.
- Select Bluetooth Mode: Switch the Function Select to Bluetooth (BT) mode. The display will indicate "BT" or a similar pairing message.
- Pairing: On your Bluetooth device, enable Bluetooth and search for "BT-28MB" or "Boytone". Select it to pair.
- Playback: Once paired, you can stream audio from your device to the stereo system.
USB/SD Record and Play Function
The unit allows recording from Vinyl, Radio, Cassette, and AUX-in sources directly to MP3 files on a USB drive or SD card. It also supports MP3 & WMA playback from these media.

Figure 5: Key features including USB/SD recording.
- Recording:
- Select the desired source (Vinyl, Radio, Cassette, AUX-in).
- Begin playback of the source material.
- Press the "REC" button on the unit. The recording indicator will light up.
- Press "STOP" to end the recording. The recorded file will be saved as an MP3 on the USB/SD media.
- Playback:
- Switch the Function Select to USB/SD mode.
- Use the navigation buttons to browse and select MP3 or WMA files for playback.
AUX-in for Other Device Connection
- Connect Device: Use a 3.5mm audio cable (not included) to connect an external audio device (e.g., smartphone, MP3 player) to the AUX-in jack on the front panel.
- Select Mode: Switch the Function Select to AUX-in mode.
- Playback: Play audio from your connected device. The sound will be output through the stereo system's speakers.
Headphone Jack
- Connect Headphones: Plug 3.5mm headphones into the headphone jack on the front panel for private listening. Sound from the speakers will be muted.
Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the unit's exterior. Do not use abrasive cleaners or solvents.
- Dust Cover: Keep the dust cover closed when the turntable is not in use to protect the platter and stylus from dust.
- Stylus Care: Handle the stylus (needle) with extreme care. Clean it periodically with a soft brush designed for stylus cleaning, brushing from back to front.
- Storage: If storing the unit for an extended period, disconnect it from power and cover it to protect from dust.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not securely plugged in. | Check power cord connection to unit and wall outlet. |
| No sound from speakers | Volume too low; Speakers not connected correctly; Headphones plugged in. | Increase volume; Check speaker wire connections and polarity; Disconnect headphones. |
| Turntable not spinning or playing correctly | Speed setting incorrect; Tone arm not lowered; Stylus dirty or damaged. | Select correct RPM; Lower tone arm with cue lever; Clean or replace stylus. |
| Poor radio reception | Antenna not extended/positioned correctly. | Extend FM antenna fully; Rotate unit for better AM reception. |
| Bluetooth pairing issues | Unit not in BT mode; Device too far; Device already paired with another unit. | Ensure unit is in BT mode; Move device closer; Disconnect from other devices. |
| Recording to USB/SD not working | USB drive/SD card full or incompatible format; Source not playing. | Use a compatible, empty USB/SD; Ensure source is playing before pressing REC. |
Specifications
- Model: BT-28MB
- Brand: Boytone
- Product Dimensions: 22.5 x 11 x 9 inches
- Item Weight: 13.82 pounds
- Material: Wood, Plastic
- Connectivity Technology: Wireless (Bluetooth), Wired (AUX-in)
- Turntable Speeds: 33/45/78 RPM
- Included Components: Main Unit, 2 Speakers, 45 RPM Adapter, Remote Control
- Features: AM/FM Radio, CD Player, Stereo Cassette Tape Player, MP3 & WMA Playback, USB/SD Record and Play Function, 3.5mm Headphone Jack, AUX-in.
Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or contact Boytone customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
Protection Plans: Additional protection plans may be available for purchase. Please refer to your retailer for details.





