The Pioneer SX-V500(BK) is an audio/video stereo receiver designed to provide comprehensive control and amplification for a home entertainment system. It integrates tuner, pre-amplifier, and power amplifier functions, along with video switching capabilities, making it a central hub for audio and video sources.
Function Description
The receiver features a multi-band tuner (FM/AM) with auto-tuning, auto-scan, and memory scan functions, allowing users to easily access and store their favorite radio stations. The audio section includes inputs for various sources such as Phono, CD, Tape (1 and 2), and Adaptor (for external processors), along with a Microphone input. Video switching is provided for VCR1, VCR2, and Video Disc (VD), enabling users to route video signals to a monitor.
Key audio processing features include volume, balance, loudness, and simulated stereo. The volume control offers a wide attenuation range, displayed digitally, and can be adjusted in steps. The balance function allows for precise left/right channel adjustment. Loudness compensation enhances bass and treble at low listening levels. The simulated stereo function converts mono signals into a stereo-like soundfield. Dynamic Noise Reduction (DNR) is also integrated to reduce noise from various sources.
The power amplifier section delivers a continuous average power output of 80 watts per channel into 8 ohms (from 20 Hz to 20,000 Hz) with no more than 0.03% total harmonic distortion. This ensures clean and powerful audio reproduction. The receiver also includes a headphone jack for private listening and speaker terminals for connecting main and remote speaker pairs.
Important Technical Specifications
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Amplifier Section:
- Continuous Average Power Output: 80 watts per channel (8 ohms, 20 Hz – 20 kHz, 0.03% THD).
- Total Harmonic Distortion: 0.03% (8 ohms, 1 kHz, 80 W).
- Input Sensitivity/Impedance:
- Phono MM: 2.5 mV / 50 kΩ
- CD, VCR, VD, TAPE, ADAPTOR: 150 mV / 50 kΩ
- Microphone: 2.0 mV / 10 kΩ
- Output Level/Impedance:
- TAPE REC: 150 mV / 2.2 kΩ
- PRE OUT: 1.0 V / 2.2 kΩ
- Frequency Response:
- Phono MM: 20 Hz – 20 kHz (±0.3 dB)
- CD, VCR, VD, TAPE, ADAPTOR: 5 Hz – 100 kHz (+0 dB, -3 dB)
- Signal-to-Noise Ratio (IHF, short-circuited A network):
- Phono MM: 80 dB
- CD, VCR, VD, TAPE, ADAPTOR: 98 dB
- Tone Control:
- Bass: ±8 dB (100 Hz)
- Treble: ±8 dB (10 kHz)
- Loudness Contour: +6 dB (100 Hz), +3 dB (10 kHz) at -30 dB volume.
- Dynamic Noise Reduction (DNR): 10 dB (1 kHz), 20 dB (10 kHz).
- Simulated Stereo: 10 dB (1 kHz), 20 dB (10 kHz).
- Damping Factor: 40 (8 ohms, 1 kHz).
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FM Tuner Section:
- Usable Sensitivity: 11.2 dBf (2.0 µV, mono).
- 50 dB Quieting Sensitivity: 15.7 dBf (3.0 µV, mono), 38.6 dBf (45 µV, stereo).
- Signal-to-Noise Ratio: 80 dB (mono), 75 dB (stereo).
- Total Harmonic Distortion: 0.1% (mono), 0.2% (stereo).
- Frequency Response: 20 Hz – 15 kHz (+0.5 dB, -1.0 dB).
- Stereo Separation: 40 dB (1 kHz).
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AM Tuner Section:
- Usable Sensitivity: 300 µV/m.
- Signal-to-Noise Ratio: 50 dB.
- Total Harmonic Distortion: 0.5%.
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Video Section:
- Input Sensitivity/Impedance: 1.0 Vp-p / 75 ohms.
- Output Level/Impedance: 1.0 Vp-p / 75 ohms.
- Frequency Response: 5 Hz – 6 MHz (+0 dB, -3 dB).
- Signal-to-Noise Ratio: 50 dB.
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Miscellaneous:
- Power Requirements: AC 120 V, 60 Hz (USA/Canada model); AC 110/120/220/240 V, 50/60 Hz (multi-voltage model).
- Power Consumption: 360 VA, 260 W.
- Dimensions (W x H x D): 420 x 97 x 322 mm (16-9/16 x 3-13/16 x 12-11/16 inches).
- Weight (without package): 6.4 kg (14 lbs 2 oz).
Usage Features
The SX-V500(BK) is designed for ease of use with a clear front panel layout and remote control capability (optional). The display panel provides visual feedback for various settings, including tuner frequency, volume level, and active input.
- Tuner Operation: The tuner supports both FM and AM bands. Auto-tuning allows the receiver to automatically find and lock onto strong stations. Auto-scan sweeps through the band and stops at each receivable station, while memory scan cycles through pre-stored stations. Up to 30 FM/AM stations can be stored in memory. The "Simulated Stereo" function can be applied to mono FM broadcasts to create a wider soundstage.
- Audio Source Selection: Dedicated buttons or a rotary selector allow users to switch between various audio inputs (Phono, CD, Tape 1, Tape 2, Adaptor). The Adaptor input is particularly useful for integrating external audio processors like graphic equalizers or surround sound units.
- Video Switching: The receiver acts as a video switcher, allowing users to connect multiple video sources (VCR1, VCR2, VD) and select which signal is sent to the monitor. This simplifies cable management and source selection for video playback.
- Volume and Balance Control: Volume is adjusted digitally, with a display indicating the current level. The balance control allows for precise left/right channel adjustment, which is also displayed visually.
- Loudness and DNR: The loudness function can be engaged to boost bass and treble at lower listening volumes, compensating for the human ear's reduced sensitivity to these frequencies. The DNR (Dynamic Noise Reduction) feature helps to clean up noisy audio signals, improving clarity.
- Speaker Outputs: The receiver supports two pairs of speakers (Main and Remote), allowing for audio distribution to different rooms or for bi-wiring compatible speakers.
Maintenance Features
The service manual provides detailed instructions for maintenance, troubleshooting, and repair, ensuring the longevity and optimal performance of the device.
- Safety Precautions: The manual emphasizes critical safety checks, including leakage current measurement, to prevent electric shock and ensure product safety. It advises using only specified replacement parts and following proper wiring procedures.
- Disassembly and Reassembly: Comprehensive guides are provided for disassembling and reassembling various components, including the control assembly, volume assembly, RF switch assembly, and heat sink. These instructions are crucial for technicians performing repairs or component replacements.
- Parts Location and Packing: Detailed diagrams and lists identify the location of all internal components and their part numbers, facilitating easy identification and ordering of replacement parts. Packing instructions are also included for safe transportation.
- P.C. Boards Connection Diagram: Extensive diagrams illustrate the connections between all printed circuit boards (PCBs), which is essential for diagnosing connectivity issues and ensuring correct reassembly.
- Schematic Diagram: Full schematic diagrams are provided for all major circuits (Tuner, AF, Control, Video, RF Switch, Power Supply), allowing technicians to understand the electronic design and troubleshoot at a component level.
- Electrical Parts List: A comprehensive list of all electrical components, including semiconductors, switches, coils, capacitors, and resistors, along with their part numbers, is provided for accurate replacement.
- Adjustments: Specific adjustment procedures are outlined for the FM and AM tuner sections to ensure accurate frequency reception and optimal performance. These include steps for adjusting sensitivity, quieting, and stereo separation using specialized test equipment.
- Circuit Descriptions: Detailed explanations of how each major circuit block functions (Tuner, Audio Pre-amp, RF, Video, Power Amp) are included, aiding in understanding the device's operation and troubleshooting.
- IC Pin Descriptions: Pin descriptions and block diagrams for key integrated circuits (ICs) are provided, which are invaluable for diagnosing IC-related faults.
The SX-V500(BK) is designed for both performance and serviceability, making it a reliable choice for audio/video enthusiasts.
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