Zavedení
This manual provides detailed instructions for the proper setup, operation, and maintenance of your SANSUI TU-α707i Digital Synthesizer FM/AM Tuner. Please read this manual thoroughly before using the unit to ensure optimal performance and longevity. Keep this manual for future reference.
Bezpečnostní informace
- Napájení: Zapojte přístroj pouze do síťové zásuvky danéhotage specifikováno na jednotce.
- Větrání: Ensure adequate ventilation. Do not block ventilation openings or place the unit on soft surfaces that may impede airflow.
- Vlhkost a kapaliny: Nevystavujte jednotku dešti, vlhkosti ani kapajícím/stříkajícím tekutinám. Na jednotku nestavte předměty naplněné tekutinami, například vázy.
- Teplo: Udržujte jednotku mimo dosah zdrojů tepla, jako jsou radiátory, topná tělesa, kamna nebo jiná zařízení produkující teplo.
- Čištění: Disconnect the power cord from the wall outlet before cleaning. Use a soft, dry cloth. Do not use liquid cleaners or aerosol cleaners.
- Servis: Nepokoušejte se tento výrobek opravit sami. Veškerý servis svěřte kvalifikovanému servisnímu personálu.
Vlastnosti produktu
The SANSUI TU-α707i Digital Synthesizer FM/AM Tuner incorporates advanced technologies for superior audio reception and quality:
- Equipped with SANSUI's unique Super Linear System digital synthesizer FM/AM tuner.
- Features SANSUI's unique Super Linear Receiving Circuit (SLRC), achieving both high-sensitivity reception for weak signals and effective interference rejection for strong signals.
- The IF section includes a WIDE/NARROW bandwidth switching mechanism. WIDE mode provides high-quality reception with low distortion, while NARROW mode minimizes adjacent station interference in strong signal areas, ensuring reliable reception of the desired station.
- Incorporates the newly developed Super Linear Detector Circuit (SLDC) for linear detection of audio signals from FM waves.
- The MPX section utilizes SANSUI's original digital decoder SLDD IV. This digital processing method avoids harmonic components that can cause adjacent station demodulation, precisely stereo demodulating only the desired station's signal.
- The power supply section employs a multi-power supply circuit that independently supplies power to the audio, RF, and control systems, enhancing stability and performance.
- Equipped with A/B two-system antenna inputs and a switching function. This allows for adaptation to the arrival direction of radio waves from different FM stations, achieving optimal reception.
- Features a direct input function for tuning by entering the desired station's frequency using the 10-key pad. Includes one-touch preset memory, memory scan for quickly selecting preset stations, and a LAST-2 memory function for programmed recording of two broadcast stations.

Nastavení
1. Připojení antény
Connect your FM and AM antennas to the corresponding terminals on the rear panel of the tuner. The TU-α707i features two FM antenna inputs (A and B) to optimize reception from different directions. Use a 75Ω coaxial cable for FM antenna connections. For AM, connect the supplied loop antenna or an external AM antenna.
2. Připojení audio výstupu
Connect the audio output jacks (RCA L/R) of the TU-α707i to an available input on your amplifier or receiver (e.g., 'Tuner' or 'Aux' input) using appropriate RCA audio cables.
3. Připojení napájení
Plug the power cord into an AC wall outlet. Ensure the voltage odpovídá specifikacím jednotky.
Návod k obsluze
1. Zapnutí/vypnutí
Press the POWER button on the front panel to turn the unit on or off.
2. Selecting FM/AM Band
Press the FM or AM button to select the desired broadcasting band.
3. Ladění stanic
- Přímý vstup: Use the 10-key pad to directly enter the frequency of the desired station. Press the 'Enter' button to confirm.
- Přednastavená paměť: The tuner supports 10 preset stations for both FM and AM. To recall a preset station, press the corresponding preset number button.
- Skenování paměti: Activate the Memory Scan function to quickly cycle through and listen to your preset stations.
- Ruční ladění: Use the tuning knob or up/down arrow buttons to manually adjust the frequency.
4. FM Bandwidth Selection (WIDE/NARROW)
For FM reception, press the WIDE/NARROW button to switch between bandwidth modes. Use WIDE for optimal sound quality in strong signal areas and NARROW to reduce interference from adjacent stations in crowded broadcast environments.
5. Antenna A/B Switching
If you have connected two FM antennas, use the A/B antenna selector button to switch between them. Select the antenna that provides the best reception for the current station.
6. LAST-2 Memory Function
The LAST-2 memory function allows you to program and quickly switch between two specific broadcast stations, useful for timed recording with an external recorder.
Údržba
Čištění jednotky
To clean the exterior of the tuner, first disconnect the power cord. Use a soft, dry cloth to wipe surfaces. For stubborn dirt, lightly dampen the cloth with water or a mild, non-abrasive cleaner. Avoid using harsh chemicals, solvents, or abrasive materials, as these can damage the finish. Do not allow liquids to enter the unit.
Obecná péče
Ensure the unit is placed in a well-ventilated area to prevent overheating. Avoid exposing the tuner to direct sunlight, extreme temperatures, or high humidity. Regularly check cable connections to ensure they are secure.
Odstraňování problémů
If you experience issues with your SANSUI TU-α707i, refer to the following common problems and solutions:
| Problém | Možná příčina | Řešení |
|---|---|---|
| Žádná síla | Napájecí kabel odpojen; Vadná zásuvka | Zkontrolujte připojení napájecího kabelu; zkuste jinou zásuvku |
| Žádný zvuk | Audio cables disconnected; Amplifier input not selected; Tuner volume too low (if applicable) | Check audio cable connections; Select correct input on amplifier; Adjust ampobjem čističky |
| Poor FM/AM reception | Antenna not connected or poorly positioned; Interference; Incorrect bandwidth selected | Connect/adjust antenna position; Try switching FM antenna A/B; Switch FM bandwidth (WIDE/NARROW); Move unit away from other electronic devices |
| Nelze naladit konkrétní stanici | Incorrect frequency entered; Station out of range | Verify frequency input; Try manual tuning; Check local broadcast availability |
Pokud problém přetrvává i po vyzkoušení těchto řešení, obraťte se na kvalifikovaný servisní personál.
Specifikace
| Funkce | Specifikace |
|---|---|
| Model | Tuner FM / AM |
| Značka | SANSUI |
| Číslo modelu výrobce | TU-α707i |
| Typ tuneru | AM, FM |
| FM Usable Sensitivity | 10.8 dBF |
| FM SN50dB Sensitivity (Mono) | 16.2 dBF |
| FM SN50dB Sensitivity (Stereo) | 37.0 dBF |
| FM Effective Selectivity (Wide) | 60 dB |
| FM Effective Selectivity (Narrow) | 75 dB |
| FM SN Ratio (Mono) | 98 dB |
| FM SN Ratio (Stereo) | 91 dB |
| FM Distortion (Stereo) | 0.0095 % |
| FM Separation | 60 dB nebo více |
| FM Image Rejection Ratio | 80 dB |
| FM Spurious Rejection Ratio | 120 dB |
| FM IF Rejection Ratio | 120 dB |
| Impedance antény | 75Ω |
| FM/AM Preset Memory | 10 stations (each band) |
| AM Usable Sensitivity | 48 dB/m |
| AM Effective Selectivity (Wide) | 30 dB |
| AM Effective Selectivity (Narrow) | 50 dB |
| AM SN Ratio | 50 dB |
| AM Distortion | 0.3 % |
| Jmenovitá spotřeba energie | 12W |
| Rozměry (Š×V×H) | 448 × 98 × 315 mm |
| Hmotnost | 5.1 kg |
| ASIN | B085DDDHR2 |
Záruka a podpora
For warranty information and customer support, please refer to the warranty card included with your product or visit the official SANSUI website. Keep your purchase receipt as proof of purchase for any warranty claims. Do not attempt to repair the unit yourself, as this may void your warranty.