Sony BT3700U Car Stereo Manual

The Sony BT3700U is a single-DIN car stereo featuring Bluetooth connectivity for hands-free calling and audio streaming, USB port for device charging and media playback, AM/FM radio with preset stations, auxiliary input, CD player, and a detachable faceplate for security. It delivers 50W x 4 high power output, includes a remote control, and supports steering wheel control interface. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Playing Media 8. Bluetooth Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main unit with display, Remote Control, Wiring harness, Detachable faceplate, USB port, AUX-IN jack, Microphone for hands-free.

Feature	Description
Bluetooth	For hands-free calling and wireless audio streaming
USB Port	For charging devices and playing media files
AUX-IN Jack	For connecting external audio sources via 3.5mm cable
CD Player	Plays audio CDs, CD-R, CD-RW
AM/FM Tuner	Radio with 18 FM/6 AM presets
Power Output	50W x 4 channels (max)
Detachable Faceplate	Security feature to prevent theft
Remote Control	For wireless operation of main functions
Steering Wheel Control	Ready interface (adapter required)
Power / Volume Knob	Turns unit on/off and adjusts volume

Installation

Unpack and inspect contents. Ensure vehicle is off and battery disconnected.

Remove existing stereo: Use removal keys or tools specific to your vehicle.
Connect wiring harness: Match colors (red to ignition, yellow to battery, black to ground). Connect speakers.
Connect antenna: Plug vehicle antenna cable into the rear port.
Secure the unit: Slide into dash opening and secure with mounting sleeve.
Reconnect battery and test functions.

WARNING! Disconnect vehicle battery before installation to avoid short circuits or electrical damage.

First-Time Setup

Reconnect battery; power on the stereo.

Set the clock: Press and hold the SETUP button, use SRC or tuning knob to adjust time.
Pair Bluetooth: Go to Bluetooth menu, search for "Sony BT3700U" from your phone, enter PIN 0000 if prompted.
Program radio presets: Tune to desired station, press and hold a numbered button (1-6) to store.
Adjust audio settings: Use AUDIO menu for bass, treble, fader, balance.

CAUTION! Ensure all wiring is insulated and secure before reconnecting power.

Specifications

Chassis Size: Single-DIN (2" x 7").
Power Output: 50W x 4 (Max), 17W x 4 (RMS).
Bluetooth Version: 3.0+EDR, profiles: HFP, A2DP, AVRCP.
Supported Media: CD, CD-R/RW, MP3/WMA from USB, USB mass storage class devices.
Tuner: FM 87.5-108 MHz, AM 530-1710 kHz.
Audio Inputs: USB, AUX-IN 3.5mm.
Power Supply: 12V DC, negative ground.
Operating Temp: 14°F to 122°F (-10°C to 50°C).

Controls and Settings

Access menus via SETUP button. Front Panel: Power/Volume knob, SRC (source), EJECT (CD), AUX/USB port.

Remote: POWER, Numeric buttons, VOL +/-, MUTE, SRC, BAND, PLAY/PAUSE, PHONE.

Audio Settings: BASS, TREBLE, FADER, BALANCE, LOUDNESS (On/Off). Radio: Manual/Seek tuning, preset memory. Bluetooth: Pairing, phonebook access, call history. Display: Dimmer, clock format (12/24hr). Security: Code entry for anti-theft (if enabled).

Connecting Devices

USB: Connect flash drive or phone for charging/playback. AUX: 3.5mm cable from external player. Bluetooth: Pair mobile phone.

Ensure stereo is in ACC or ON mode.
For USB: Insert device; stereo will switch to USB mode if set to auto-detect.
For AUX: Plug cable into front AUX jack; press SRC to select AUX mode.
For Bluetooth: Activate pairing from phone as described in First-Time Setup.

Tip: Use high-quality USB drives formatted in FAT32 for best compatibility.

Playing Media

Supports CD, USB media (MP3/WMA), AUX, Bluetooth audio.

Select Source: Press SRC repeatedly to cycle through FM, AM, CD, USB, BT, AUX.
CD: Insert disc (label side up) into slot; playback starts automatically.
USB: Navigate folders using >>| and |<< buttons; press PLAY/PAUSE.
Skip Tracks: Use >>| (next) and |<< (previous) buttons.
Random/Repeat: Press RPT during playback to cycle modes (Off, Track, Folder, All).
Phone Call: Incoming call rings through speakers; press PHONE button to answer/end.

WARNING! Do not insert damaged or irregular-shaped CDs. Do not use while driving if operation distracts you.

Bluetooth Features

Hands-Free Calling: Pair phone to make/receive calls via built-in mic. Audio Streaming: Stream music from phone apps. Phonebook Access: Sync contacts for voice dialing (phone dependent). Last Number Redial: Press PHONE twice quickly.

Care & Cleaning

Detach faceplate before cleaning. Use soft, dry cloth for display and buttons. For stubborn dirt, dampen cloth slightly with water; never use solvents.

CAUTION! Do not get moisture into openings (USB, CD slot). Store faceplate in protective case.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for vehicular use. Bluetooth® is a registered trademark of Bluetooth SIG, Inc. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Wiring/fuse	Check yellow (battery) and red (ignition) wires; check vehicle fuse.
Bluetooth not pairing	Phone settings/range	Delete old pairing on phone; ensure stereo is in pairing mode; stay within 3 ft.
No sound from speakers	Speaker wiring/settings	Verify speaker wires are connected; check fader/balance settings.
USB not recognized	Format/compatibility	Reformat USB to FAT32; try a different USB device.
CD won't eject	Mechanical jam/power	Use small tool to manually eject; check power connection.

Reset: Disconnect battery for 5 minutes to reset unit memory.

Service: 1-800-222-7669; www.sony.com/electronics/support