BQCC SC1668 Car MP3 Player User Manual

1. Introduction

Thank you for choosing the BQCC SC1668 Car MP3 Player. This manual provides detailed instructions for installation, operation, and troubleshooting to ensure you get the best experience from your device. The SC1668 features a 2.2-inch HD touchscreen, FM radio, Bluetooth 6.0, dual USB ports with Type-C charging, TF/SD card support, AUX input, 15-band EQ, and reverse polarity protection.

2. Safety Precautions

• Before installation, please test the device to ensure it is functioning correctly. Products may be affected by long transit.
• Do not connect the product directly to the car's power supply without proper wiring, as this may cause damage.
• Ensure all wiring is correct to prevent short circuits or damage to the unit and vehicle.
• Do not attempt to repair the unit yourself if it is damaged. Contact qualified personnel for assistance.

3. Package Contents

Please check the box for the following items:

• 1x MP3 Car Radio (SC1668)
• 1x Power Cord
• 1x Remote Control (18-Key)
• 1x User Manual
• 1x Disassembly Key

4. Specifications

The following table details the technical specifications of the BQCC SC1668 Car MP3 Player:

5. Setup

5.1 Before Installation

Before installing the product in your car, it is highly recommended to test the unit first. Due to the long journey during transportation, the product's functionality might be affected. Testing it beforehand can prevent unnecessary installation work.

5.2 Wiring Instructions

Proper wiring is crucial for the correct operation of the car MP3 player. Refer to the diagram below for detailed connections.

• Power Supply: Connect the Yellow wire to +12V constant power, Red wire to +12V ignition switch (ACC), and Black wire to ground (B-).
• Speaker Connections: Connect the Left Audio Output and Right Audio Output to your car's front and rear speakers as indicated. Ensure correct polarity.
• Antenna: Connect the Blue wire to the radio antenna.
• Reverse Polarity Protection: This unit features built-in protection against incorrect power connections. Connecting positive and negative power cables in reverse will not damage the circuit board.

5.3 Installation Dimensions

The unit is designed for a standard single-DIN slot. Refer to the dimensions below to ensure compatibility with your vehicle's dashboard.

• Installation Dimensions: 178 x 50 mm (7.01 x 1.97 inches)
• Faceplate Dimensions: 188 x 58 mm (7.40 x 2.28 inches)
• Unit Depth: 60 mm (2.36 inches)

5.4 Installation Showcase

Here's an example of the SC1668 installed in a car dashboard, showing the before and after modification views.

6. Operating Instructions

6.1 Panel Overview

Familiarize yourself with the front and rear panels of the device.

Front Panel Controls:

• Volume Adjustment: Rotate the knob.
• Power On/Off: Short press to power on; short press again to display virtual buttons; long press for standby mode (clock display); long press again to turn off the screen.
• USB Play: USB port for media playback.
• Type-C Charging: Type-C port for device charging (red light flashes while charging).
• Reset Hole: Tap to reset the system.
• AUX: 3.5mm external audio input.
• Screen: 2.2-inch HD Digital Display.
• Handsfree: Bluetooth call functions.
• IR: Remote control signal receiving window.
• Mic: Microphone pickup hole.
• TF Card Playback: Micro SD card storage device slot.

Rear Panel Connections:

• Power Plug: Main power connection.
• Right Channel Audio Output (RCA): For connecting to external amplifiers/subwoofers.
• Left Channel Audio Output (RCA): For connecting to external amplifiers/subwoofers.
• Receiving Antenna: For FM radio reception.

6.2 Function Key Introduction (Front Panel)

The front panel features various buttons and knobs for controlling the device:

1. Back/Main Interface: Short press to return to the previous level; long press to return to the main interface.
2. Power/Standby: Short press to power on; short press again to display virtual buttons. Long press to enter standby mode (displaying the clock); long press again to turn off the screen. In standby mode, press any key to power on.
3. Playlist/Voice Assistant: Short press to display the playlist; long press to activate the mobile phone's voice assistant (requires Bluetooth connection).
4. EQ/LOUDness: Short press to switch EQ modes; long press to toggle the LOUDness setting.
5. Next Station/Track/Answer Call: Short press to automatically search for the next radio station; long press, then short press to manually step forward to the next station/track; answer incoming calls.
6. Previous Station/Track/End Call: Short press to automatically search for the previous radio station; long press, then short press to manually step backward to the previous station/track; end/decline calls.
7. Radio Channel/Shuffle/List Up: In Radio mode, short press to switch backward through channels 18-1. In Music playback mode, short press to toggle between Shuffle and Sequential playback. In List mode, short press to select the item above.
8. Radio Preset Page/Loop Mode: In Radio mode, short press to cycle through pages of preset channels. In Music playback mode, short press to toggle Loop modes: Single Track Loop > Folder Loop > All Loop.
9. Radio Channel/Brightness/List Down: In Radio mode, short press to switch forward through channels 1-18. In Music playback mode, short press to adjust screen brightness: High > Medium > Low. In List mode, short press to select the item below.
10. Radio Browse/Save/Music Browse: In Radio mode, short press to browse available stations; long press to automatically search for and save stations. In Music playback mode, short press to browse tracks.
11. Mute/Unmute/Pause/Play/Volume Display: In Radio mode, short press to Mute/Unmute. In Music playback mode, short press to Pause/Play. In List mode, short press to display the volume level, then rotate the knob to adjust the volume.
12. Clock Face/Volume/Mode/Scroll: In Power-off or Standby mode, rotate the knob to switch between different clock faces. In Music or Radio mode, rotate the knob to adjust the volume; short press to switch between modes. In List mode, rotate the knob to scroll up or down through the list.
13. Power/Standby/Mode Selection (Knob): Short-press to power on; long-press to enter standby mode (displaying the clock)—while in this mode, rotate the knob to switch watch faces, then long-press again to turn off the screen. Once powered on, short-press to display the current mode; rotate the knob to select a mode, then short-press again to confirm. When music is playing, rotate the knob to adjust the volume. When connected via Bluetooth, double-press to wake up your phone's voice assistant. When an incoming call is received, single-press to answer, double-press to decline. During an active call, short-press to toggle audio output between phone's earpiece and car speakers; double-press to end the call.
14. Play/Pause/Mute/List View (Screen): On the USB/TF/BT music interface, short-press to play/pause. On the Radio/AUX interface, short-press to mute. On the Radio/USB/TF interface, double-press to enter the list view; long-press for 2 seconds to return to the previous level. When music is playing, rotate the knob to switch between previous/next track or radio station. Within list menus or settings, rotate the knob to scroll up or down to select options.

6.3 Remote Control Functions

The included remote control provides convenient access to various functions.

1. Power On/Off
2. Mode: Switch between RADIO, USB, SD, AUX IN, BT; End Call.
3. Mute On/Off
4. Band (FM1-FM2-FM3); Answer Call.
5. Volume +
6. AMS (Automatically Search For Stored Stations)
7. Previous Track
8. Function settings
9. Next Track
10. EQ: ROCK-VOCA-JAZZ-FLAT-CLASSIC-ELECTRONIC-POP-EQ OFF
11. Volume -
12. Clock Display
13. Number 1: Play / Pause
14. Number 2: Intro to Music
15. Number 3: Loop Playback
16. Number 4: Random Playback
17. Number 5: Track-10; DIR-
18. Number 6: Track+10; DIR+

6.4 Touchscreen UI Interface

The 2.2-inch HD digital display provides an intuitive interface for controlling the device.

Standby Clock Interface:

While in standby mode, rotate the knob or swipe left/right on the touchscreen to select the desired standby clock face.

Main Interface:

Rotate the knob left or right, or briefly press the "Previous/Next Track" buttons, to select the corresponding function; swipe left or right on the touchscreen to select the corresponding function.

Radio Interface:

Users can listen to their favorite radio stations or access the channel list interface to select and save their preferred stations. The FM tuner supports saving up to 18 stations.

Dynamic Spectrum Visualizer (Idle Mode):

The colored bars of the spectrum fluctuate dynamically in sync with the rhythm. The colors of the bars synchronize and change in tandem with the lighting effects. This feature can be toggled on or off via the settings.

Music Playback Interface:

Song titles, ID3 tags, lyrics, and other information are displayed in multiple languages. Press the dedicated button to toggle the display between lyrics, folders, and the song list. Touch "A" to display lyrics. Touch the list icon to display the folder and song list.

Bluetooth Functions:

Equipped with a Bluetooth 6.0 chip, it ensures stable, interference-resistant, and low-latency connection. Bluetooth calls feature HD noise cancellation for crystal-clear audio free of static, while Bluetooth music transmission is lossless, faithfully reproducing the original sound.

Bluetooth Call Interface: Users can answer, hang up, or decline calls; during a call, they can select whether the audio is output via the head unit or the mobile phone. Default Bluetooth Pairing Name: "SWL-BT".

Bluetooth Music Playback: Once your mobile phone is connected via Bluetooth, the audio from your phone's music is routed to the car speakers.

Smart Voice Assistant:

Simply connect your mobile phone via Bluetooth to activate the smart voice assistant, enabling voice control over calls, music, and other functions, freeing up your hands for a convenient and safe driving experience.

FM Radio:

Covers the entire mainstream FM band (87.5–108 MHz), offering stable, interference-resistant signals and crystal-clear reception for a worry-free listening experience.

Audio Settings:

15-Band EQ Professional Tuning: Features precise 15-band EQ adjustment and multi-style presets, supporting independent control of treble, mid-range, and bass frequencies, as well as LOUDness settings. With adjustable 4-channel sound staging, it creates an immersive, vehicle-wide surround sound experience.

DSP Audio Effects Interface: Users can adjust the EQ, treble and bass levels, and the output volume for each of the four speakers.

Treble, Mid, and Bass Adjustment Interface: Touch or briefly press the knob to toggle left or right between Treble, Mid, and Bass adjustments.

Speaker Adjustment Interface:

• In the high-power version, users can individually adjust the output volume of the four speakers: front, rear, left, and right.
• In the low-power version, users can individually adjust the output volume of the two main speakers: left and right (front and rear speakers cannot be adjusted).

Settings Interface:

Users can configure the date and time, background images, watch faces, languages, colored lights, and more.

Multi-Color Lighting Adjustment Interface:

Users can select from seven fixed light colors, enable a color-gradient mode, or—by selecting the "Custom" option—freely combine the three primary colors (Red, Green, and Blue) to create their own preferred color.

UI Interface Showcase:

7. Troubleshooting

This section addresses common issues you might encounter with your BQCC SC1668 Car MP3 Player.

7.1 Cannot Boot Normally

1. Incorrect Wiring: If only two of the "Yellow," "Red," and "Black" wires are connected, the unit will not start. The Yellow wire should connect to the positive pole, the Red wire to the ignition switch (ACC) control line, and the Black wire to the negative pole.
2. Incompatible Wiring: Do not connect based solely on wire color, as original car wiring colors may not be standard. Incorrect connection can cause damage.
3. Original Car Plug: The original car plug cannot be directly plugged into the new unit. Even if it fits, it may not function correctly or could cause damage.
4. Fuse Issue: If the three wires are connected correctly but the unit does not boot, check the fuse on the Yellow line. If the fuse is intact, twist the Yellow and Red wires together, turn on the key, and press the unit’s power button to test.
5. Repeated Fuse Burnout: If the fuse burns every time it's replaced, stop replacing it. This indicates a short circuit in the unit's protection circuit. Seek professional repair or replacement.

7.2 Automatic Shut-down

1. Cable Error: If the Blue cable (automatic antenna power supply) is connected to the unit's main power cable, it will automatically shut down. Follow the correct wiring method.
2. Unstable Voltage: Test with a stable 12V-5A power supply. If the unit still shuts down, it indicates a problem with the unit.

7.3 Noise Issues

1. Low Speaker Power: If the original speaker power is too low, increasing the unit's volume will cause noise. Consider replacing with higher-power speakers or keeping the volume moderate.
2. Grounded Speaker Cable: If a speaker cable is grounded (touching metal), disconnect it from the chassis and connect it directly to the unit's speaker cable.

7.4 Remote Control Not Working

1. Test Remote: Use your phone camera to check the remote's IR emitter. Point the remote at the camera and press a button. If you see a light on the phone screen, the remote has power. If not, replace the battery.

7.5 Settings Not Saved (No Memory)

1. Incorrect Power Connections: Ensure the Yellow wire is connected to constant positive power and the Red wire to the ignition switch (ACC). If they are connected together or reversed, correct their positions.

7.6 Bluetooth Not Working

1. Turn on the unit, search for its Bluetooth name ("SWL-BT") on your mobile phone, and click Connect.

7.7 Product Emits Smoke

1. Replace the fuse. If the problem persists, the internal circuit is burned. After-sales service is required.

7.8 Sound Cannot Be Adjusted

1. Reset the unit or unplug and replug the power cord.
2. If the volume knob is broken, it can be replaced.

7.9 USB Devices Cannot Be Played

1. Format the USB flash drive to FAT32. Re-download one or two songs and try again. If it still doesn't work, replace the USB flash drive.

7.10 FM Radio Does Not Receive Stations

1. Antenna Connection: Ensure the antenna plug is fully inserted. Check if the antenna is disconnected or the line is broken.
2. Search Function: Use the AMS button for automatic search or the forward/backward buttons for manual search. If issues persist, unplug the antenna and insert a screwdriver or metal strip as a temporary antenna.

7.11 No Sound Right After Installation

The unit is tested before shipment. If there's no sound, it's usually a wiring error or a short-circuited speaker wire. Check the following:

1. Check if the speaker cable is short-circuited and connected. Reconnect if necessary.
2. Verify the number of speaker cables. If your car has only 2 speaker cables and the unit requires 4, you need to re-route the car's wiring. Each speaker needs 2 wires.

7.12 No Sound After A While

Disconnect all speaker cables from the unit (do not remove them). Connect an external speaker to the gray and purple wires of the unit's tail line. Test with other wire groups (e.g., green) to see if there is sound. If sound is present, the car's speaker line is short-circuited or the speaker is damaged. If no sound, the unit is broken.

8. Maintenance

• Cleaning: Use a soft, dry cloth to clean the unit. Do not use abrasive cleaners or solvents.
• Temperature: Avoid exposing the unit to extreme temperatures.
• Moisture: Keep the unit dry. Do not expose it to water or excessive humidity.

9. User Tips

• Always double-check wiring connections before powering on the device to prevent damage.
• If experiencing sound issues, ensure all speaker wires are securely connected and not short-circuited.
• For optimal Bluetooth performance, ensure your phone is within range and paired correctly.
• When using USB drives, format them to FAT32 for best compatibility.

10. Warranty & Support

BQCC offers a 12-month manufacturer's limited warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty. Defective items must be reported and returned within the warranty period in their original packaging. Please contact customer service for support.

For detailed warranty terms and conditions, please refer to the official documentation or contact BQCC customer support.

11. Item Guides & Documents

A comprehensive user manual in PDF format is available for download. This document contains additional detailed information and diagrams.

You can view the user manual (PDF) here.