The JVC KD-R210 is a CD receiver designed for in-car audio systems, offering a range of playback, tuning, and sound adjustment features. It supports CD, CD-R, CD-RW, MP3, and WMA formats, providing versatile media playback options.
Function Description:
The KD-R210 serves as the central audio unit in a vehicle, allowing users to listen to radio broadcasts, play audio CDs, and enjoy digital music files (MP3/WMA) from discs. It features a detachable control panel for security and includes a remote controller (RM-RK50) for convenient operation. The unit provides basic audio controls such as volume, source selection, track/station navigation, and sound adjustments. It also includes a clock display and demonstration mode. For connectivity, it offers an auxiliary input jack on the control panel for external audio components. The unit is designed for 12 V DC, negative ground electrical systems.
Important Technical Specifications:
- Audio Amplifier Section:
- Power Output: 20 W RMS × 4 Channels at 4 Ω and < 1% THD+N.
- Signal-to-Noise Ratio: 80 dBA (reference: 1 W into 4 Ω).
- Load Impedance: 4 Ω (4 Ω to 8 Ω allowance).
- Tone Control Range: Bass: ±12 dB at 60 Hz; Mid-range: ±12 dB at 1 kHz; Treble: ±12 dB at 7.5 kHz.
- Frequency Response: 40 Hz to 20,000 Hz.
- Line-Out Level/Impedance: 2.5 V/20 kΩ load (full scale).
- Output Impedance: 1 kΩ.
- Subwoofer-Out Level/Impedance: 2.5 V/20 kΩ load (full scale).
- Tuner Section:
- Frequency Range (FM): 87.5 MHz to 107.9 MHz (100 kHz or 200 kHz channel interval), 87.5 MHz to 108.0 MHz (50 kHz channel interval).
- Frequency Range (AM): 530 kHz to 1,710 kHz (10 kHz channel interval), 531 kHz to 1,602 kHz (9 kHz channel interval).
- FM Tuner Usable Sensitivity: 11.3 dBf (1.0 µV/75 Ω).
- FM Tuner 50 dB Quieting Sensitivity: 16.3 dBf (1.8 µV/75 Ω).
- FM Tuner Alternate Channel Selectivity (400 kHz): 65 dB.
- FM Tuner Frequency Response: 40 Hz to 15,000 Hz.
- FM Tuner Stereo Separation: 35 dB.
- AM Tuner Sensitivity/Selectivity: 20 µV/35 dB.
- CD Player Section:
- Type: Compact disc player.
- Signal Detection System: Non-contact optical pickup (semiconductor laser).
- Number of channels: 2 channels (stereo).
- Frequency Response: 5 Hz to 20,000 Hz.
- Dynamic Range: 93 dB.
- Signal-to-Noise Ratio: 98 dB.
- Wow and Flutter: Less than measurable limit.
- MP3 Decoding Format: MPEG1/2 Audio Layer 3 (Max. Bit Rate: 320 kbps).
- WMA (Windows Media Audio) Decoding Format: Max. Bit Rate: 192 kbps.
- General:
- Power Requirement: Operating Voltage: DC 14.4 V (11 V to 16 V allowance).
- Grounding System: Negative ground.
- Allowable Operating Temperature: 0°C to +40°C (32°F to 104°F).
- Installation Size (approx.): 182 mm × 52 mm × 160 mm (7-3/16" x 2-1/16" x 6-5/16").
- Panel Size (approx.): 188 mm x 58 mm x 5 mm (7-7/16" x 2-5/16" x 1/4").
- Mass (approx.): 1.3 kg (2.9 lbs) (excluding accessories).
Usage Features:
- Display Demonstrations: The unit can be set to display demonstrations, which can be canceled by selecting "DEMO OFF" in the settings.
- Clock Setting: Users can adjust the hour and minute for the clock display.
- Reset Function: The unit can be reset after installation or if it malfunctions, which also erases preset adjustments.
- Forcible Disc Ejection: A disc can be forcibly ejected if it gets stuck.
- Remote Controller (RM-RK50): The unit comes with a remote controller. Its battery (CR2025 lithium coin battery) can be replaced when its effectiveness decreases.
- Basic Operations: Power on/off, source selection (FM1/FM2/FM3/AM, CD, AUX IN), volume control, track/folder navigation, fast-forward/reverse, and sound mode selection (iEQ: intelligent equalizer).
- Tuner Operations: Auto search for stations, manual search, and SSM (Strong-station Sequential Memory) for automatic presetting of six stations per band. Users can also manually preset stations. The unit can switch to monaural mode for improved reception of weak FM stereo broadcasts.
- Disc Operations: Playback of audio CDs, CD-R/CD-RWs (finalized, multi-session discs, but unclosed sessions are skipped), and MP3/WMA discs. It supports various disc formats (ISO 9660 Level 1/Level 2, Romeo, Joliet, Windows long file name) and bit rates (8 kbps – 320 kbps for MP3, up to 192 kbps for WMA). The unit can display album names, artist names, track titles, and folder/file names for MP3/WMA files, though it only supports one-byte characters. Playback modes include track repeat (TRK RPT), folder repeat (FLDR RPT), all random (ALL RND), and folder random (FLDR RND). It can skip tracks quickly within the same folder.
- Prohibiting Disc Ejection: A disc can be locked in the loading slot to prevent accidental ejection.
- External Component Operations: An auxiliary input jack on the control panel allows connection of external audio players. The auxiliary input level can be adjusted to prevent sudden volume increases.
- Sound Adjustments (PSM - Preset Sound Mode): Includes preset EQ modes (USER, ROCK, CLASSIC, POPS, HIP HOP, JAZZ) and allows adjustment of bass, mid-range, treble, fader, balance, loudness, and subwoofer output level.
- General Settings (PSM):
- DEMO: Toggles display demonstration mode.
- CLK DISP: Controls whether the clock is shown when power is off.
- CLOCK H/M: Sets hour and minute.
- DIMMER: Dims display and button illumination.
- SCROLL: Controls how displayed information scrolls (once, auto, off).
- L/O MODE: Configures rear line out terminals for speakers or subwoofer (WOOFER mode includes subwoofer frequency cutoff settings: LOW (90 Hz), MID (135 Hz), HIGH (180 Hz)).
- AUX ADJ: Adjusts auxiliary input level.
- TAG DISP: Toggles display of MP3/WMA tags.
- AMP GAIN: Sets amplifier gain (LOW PWR for speakers less than 50 W, HIGH PWR for speakers 50 W or more).
- AREA: Configures AM/FM intervals based on geographical region (US, EU, SA).
Maintenance Features:
- Connector Cleaning: Connectors should be wiped with a cotton swab or cloth moistened with alcohol.
- Moisture Condensation: If moisture condenses on the lens, eject the disc and leave the unit on for a few hours until the moisture evaporates.
- Disc Cleaning: Discs should be wiped in a straight line from the center to the edge. Liquid cleaners, thinners, or benzene should not be used.
- New Discs: Remove any rough areas from the inner and outer edges of new discs.
- Discs to Avoid: Do not use single CD-8 cm (3-3/16") discs, warped discs, discs with stickers or sticker residue, stick-on labels, unusually shaped discs, or C-thru (semi-transparent) discs, or discs with transparent/semi-transparent parts on the recording area.
- Installation/Connection: The manual provides detailed instructions for installation, including connecting the power cord, antenna, and external amplifier/subwoofer. It emphasizes grounding the unit to the car's chassis and using appropriate fuses. It also warns against connecting speaker leads directly to the car battery.
- Troubleshooting Guide: The manual includes a comprehensive troubleshooting section to help users diagnose and resolve common issues such as no sound, distorted sound, unit not working, disc playback problems, and incorrect display.
- Battery Replacement: Instructions for replacing the lithium coin battery in the remote controller are provided, along with warnings about battery safety.
- Professional Servicing: Users are advised not to open the top cover or attempt to service the unit themselves, as there are no user-serviceable parts inside. All servicing should be left to qualified service personnel.