The TEAC V-770 is a stereo cassette deck designed for high-quality audio recording and playback. It incorporates several advanced features to ensure optimal performance, ease of use, and durability.
Function Description
The V-770 functions as a stereo cassette deck, capable of recording and playing back audio on C-60 and C-90 type cassettes. It features a 4-track, 2-channel stereo system with a 1-head erase, 1-head record, and 1-head playback configuration. The deck supports normal, CrO2, and metal tapes, automatically detecting the tape type to apply appropriate equalization.
Key functions include:
- Recording: The deck allows users to record audio from various sources, with manual level control and a peak level meter to prevent clipping. It includes a BIAS FINE tuning control to optimize recording quality for different tape formulations.
- Playback: It provides high-fidelity playback of recorded cassettes.
- Dolby HX Pro: This feature extends the high-frequency headroom during recording, resulting in improved dynamic range and reduced distortion, especially at higher frequencies.
- Dolby B/C NR System: Noise reduction systems (Dolby B and C) are integrated to minimize tape hiss during recording and playback, enhancing the signal-to-noise ratio.
- Auto Monitor: This function allows users to monitor the source signal or the recorded signal, switching automatically or manually.
- Timer Operation: The deck can be set for timer-controlled recording or playback, allowing for unattended operation.
- Intro Check: This feature plays the first 10 seconds of each track, enabling quick content review.
- CPS (Computomatic Program Search) Function: This allows users to locate up to 15 tracks on a cassette by fast-forwarding or rewinding.
- Multi Counter Display: A digital display shows elapsed time, remaining time, or track number, aiding in navigation.
- Memory Stop/Play: Users can set a memory point to automatically stop or start playback at a desired location.
- Rec Mute: This function allows for silent recording intervals.
- Pause: Temporarily stops recording or playback.
- Headphone Output: A dedicated headphone jack with level control is provided for private listening.
Important Technical Specifications
- Tape Speed: 4.76 cm/sec (1-7/8 ips)
- Motors: 3 DC servo motors (1 for capstan, 1 for reel, 1 for mechanism)
- Wow and Flutter (WRMS): 0.03%
- Frequency Response (Overall, -20 dB):
- Normal: 20 – 19,000 Hz (25 – 18,000 Hz ±3 dB)
- CrO2: 20 – 20,000 Hz (25 – 19,000 Hz ±3 dB)
- Metal: 20 – 21,000 Hz (25 – 20,000 Hz ±3 dB)
- Signal-to-Noise Ratio (Overall):
- 60 dB (Dolby B NR in, 5 kHz)
- 70 dB (Dolby C NR in, 1 kHz)
- 80 dB (Dolby HX Pro NR in, 8 kHz)
- Input Sensitivity/Impedance:
- Line: 0.43 V for load impedance of 50 kOhms or more
- Microphone: 0.43 V for load impedance of 50 kOhms or more
- Output Level/Impedance:
- Line: 0.43 V for load impedance of 50 kOhms or more
- Headphones: 8 Ohms
- Power Requirements: 120/220/240 V AC, 50/60 Hz (model dependent)
- Power Consumption: 17 W
- Dimensions (W x H x D): 435 x 120 x 265 mm (17-1/8" x 4-3/4" x 10-7/16")
- Weight: 4.9 kg (10-7/8 lbs) net
- Environment: Avoid direct sunlight, high temperatures, humidity, and excessive dust.
- Connections: RCA type input/output jacks, microphone input jacks, headphone output jack, and a remote control jack.
Usage Features
- Power On/Off: A push-button switch controls the main power. A 2-second delay is recommended after turning off before powering on again.
- Cassette Loading: Cassettes are loaded into a front-facing compartment.
- Recording Level Adjustment: Manual controls allow precise adjustment of recording levels, monitored by a multi-segment peak level meter. The meter indicates peak levels to prevent distortion.
- BIAS FINE Tuning: A dedicated control allows fine-tuning of the recording bias to match different tape formulations, ensuring optimal frequency response.
- Tape Type Selection: The deck automatically detects normal, CrO2, and metal tape types.
- Counter Modes: The multi-counter can display elapsed time, remaining time, or track numbers. The CLEAR button resets the counter to "0000".
- Timer Play/Record: The deck can be connected to an external audio timer for automated recording or playback.
- Headphone Monitoring: A volume control is provided for the headphone output.
- Remote Control: The deck is compatible with an optional remote control unit.
- Safety Features: Warning against exposing the appliance to rain or moisture.
Maintenance Features
- Head and Tape Path Cleaning: Regular cleaning of the heads, capstans, and pinch rollers is crucial for optimal performance. Use a cotton swab dampened with a cleaning fluid specifically designed for audio equipment.
- Demagnetizing Heads: Periodically demagnetize the heads using a TEAC E-3 demagnetizer or equivalent to prevent noise and ensure clear recordings.
- External Cleaning: Clean the cabinet with a soft cloth. For stubborn dirt, use a cloth dampened with a mild detergent solution. Avoid using abrasive cleaners, benzene, or alcohol as they may damage the surface.
- Troubleshooting Guide: The manual includes a comprehensive troubleshooting section to help users diagnose and resolve common issues such as no power, no sound, poor recording quality, or tape transport problems.
- Service: In case of persistent issues, the manual advises consulting a TEAC service center or authorized dealer.
- Fuse Replacement: Instructions are provided for replacing the power fuse, if necessary.
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