Sony CDX-M620 Car Stereo Manual

The Sony CDX-M620 is an in-dash CD receiver featuring a 45W x 4 high-power output, CD-R/RW playback compatibility, FM/AM tuner with 18 FM/6 AM presets, detachable faceplate security, Bass/Mid/Treble controls, Loudness function, and a 1-bit D/A converter. It supports CD Text display, random/shuffle play, and includes a wired remote control input. 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 CD Media 8. Security Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main unit with CD slot, Detachable Faceplate, Wired Remote Control Input, Front AUX Input, Rear RCA Pre-outs, Power/Speaker Terminals.

Feature	Description
CD Player	Plays CD, CD-R, CD-RW discs; CD Text display
Tuner	FM/AM with 18 FM and 6 AM station presets
Power Output	45W x 4 (max), 22W x 4 (RMS)
Detachable Faceplate	Security feature to prevent theft
Audio Controls	Bass, Mid, Treble, Loudness, Fader/Balance
Inputs/Outputs	Front AUX input, Rear RCA pre-outs (front/rear/sub)
Display	Green fluorescent display with dimmer
Playback Modes	Random, Repeat, Intro Scan
Remote Control	Wired remote input (optional)
Power Requirements	12V DC, negative ground

Installation

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

Remove existing stereo: Use removal tools for your vehicle.
Connect wiring harness: Match colors (red=ignition, yellow=constant 12V, black=ground).
Connect speakers: Match speaker wires (front/rear pairs).
Connect antenna plug to rear antenna input.
Slide unit into dash and secure with mounting sleeve.
Reconnect vehicle battery.

WARNING! Disconnect battery before installation to prevent short circuits. Ensure all connections are secure and insulated.

First-Time Setup

Reconnect battery; turn on ignition to power unit.

Set clock: Press and hold CLOCK, adjust with TUNE/SEEK.
Program radio presets: Tune to station, press and hold a preset button (1-6).
Adjust audio settings: Use SOUND menu for Bass, Mid, Treble, Loudness.
Set fade/balance: Use FADER/BALANCE controls.
Attach faceplate: Slide onto unit until it clicks.

CAUTION! Do not force faceplate. Store in protective case when detached.

Specifications

Audio Section: 45W x 4 max power (22W x 4 RMS).
Tuner Section: FM/AM, 18 FM presets, 6 AM presets.
CD Section: Plays CD, CD-R, CD-RW; 1-bit D/A converter.
Frequency Response: 20Hz-20kHz.
Signal-to-Noise Ratio: 100dB (CD).
Pre-out Voltage: 2V.
Power Supply: 12V DC, negative ground.
Dimensions: DIN size (178mm x 50mm x 160mm).
Operating Temp: 0°C to 50°C (32°F to 122°F).

Controls and Settings

Front Panel: POWER/VOLUME knob, SOURCE, BAND, SOUND, OPEN/CLOSE, Number buttons, TUNE/SEEK, DISP, FADER/BALANCE.

Remote (optional wired): Basic playback and volume controls.

Audio Settings: Bass (-10 to +10), Mid (-10 to +10), Treble (-10 to +10), Loudness (On/Off). Radio: Manual tuning, Seek tuning, Preset memory. CD: Random (RDM), Repeat (RPT), Intro Scan. Display: Dimmer (two levels), CD Text display. Clock: 12/24 hour format.

Connecting Devices

AUX Input: Front 3.5mm jack for portable players. Pre-outs: Rear RCA for external amplifiers (front, rear, subwoofer).

Turn off unit and vehicle before connecting.
AUX: Plug 3.5mm cable from device into front AUX jack.
Pre-outs: Use RCA cables to connect to amplifier inputs.
Select source: Press SOURCE to cycle (FM/AM/CD/AUX).

Tip: Use high-quality RCA cables for pre-out connections to minimize noise.

Playing CD Media

Supports CD, CD-R, CD-RW (audio and MP3 if compatible).

Insert disc: Press OPEN/CLOSE, load CD label-side up.
Play: Press PLAY; unit starts automatically if in CD mode.
Skip tracks: Press TUNE/SEEK left/right.
Fast forward/rewind: Press and hold TUNE/SEEK.
Random play: Press RDM during playback.
Repeat: Press RPT to repeat track/disc.
Intro scan: Press SCAN to sample first 10 seconds of each track.
Eject: Press OPEN/CLOSE; remove disc.

WARNING! Do not insert damaged or irregular-shaped discs. Do not use in extreme temperatures.

Security Features

Detachable Faceplate: Remove by pressing release button; store securely. Security Code: Optional code can be set to deter theft (see manual for setup).

Care & Cleaning

Disconnect battery before cleaning. Use soft, dry cloth for faceplate and unit. For CD lens, use approved cleaning disc only.

CAUTION! Do not use solvents or abrasive cleaners. Keep faceplate away from direct sunlight and heat.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. This device complies with Part 15 of the FCC Rules. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact Sony Customer Service at 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Blown fuse/wiring	Check vehicle fuse (10-15A); verify wiring connections (red/yellow/black).
No sound from speakers	Speaker wiring/fader	Check speaker connections; adjust fader/balance settings.
CD won't play	Disc/dirty lens	Ensure disc is clean, not scratched; try a different CD; use cleaning disc.
Poor radio reception	Antenna connection	Ensure antenna plug is fully inserted; check antenna condition.
Faceplate not attaching	Misalignment/debris	Clean connectors on unit and faceplate; align properly and slide gently.
Unit asks for code	Security code enabled	Enter 4-digit security code (default may be 0000).

Reset: Disconnect battery for 1 minute to reset unit (may clear presets).

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