Daily maintenance of home theater system

　　The AV amplifier is the core equipment of the home private theater system, with many functions and complicated adjustment, so it is necessary to master the correct use method. Learning to take care of your home theater system will extend the life of the device

　　1. The power-on and power-off sequence of each audio equipment

　　Boot sequence: turn on the DVD player, tuner, record player, equalizer, effector, karaoke machine, mixer, power amplifier preamp first, and finally turn on the power amplifier.

　　Shutdown sequence: Just the opposite of the boot sequence, turn off the power amplifier and DVD player first, then turn off the speakers, and avoid cutting off all power at the same time. Do not turn on the amplifier to connect speakers and plug in audio source equipment. All wiring and input sockets and unplugging should be done in a shutdown state to avoid damage to the equipment.

　　Second, the maintenance of the DVD player

　　1. Pay attention to heat protection: The DVD player should be placed in a place without sunlight, away from other heat sources and heat radiation sources, and in a ventilated and dry place.

　　2. Pay attention to moisture-proof: avoid being affected by large humidity changes, keep dry and clean, and prevent dust and moisture from invading the machine.

　　3. Anti-vibration: It should not be used in places with vibration. When the DVD player vibrates, the error correction function will be affected, and the search burden will be increased at the same time, which will accelerate the aging of the bald head. Be careful when handling, knocking, bumping, etc. are strictly prohibited.

　　4. Avoid heavy pressure: Do not place heavy objects such as TV sets directly on the power amplifier or DVD player.

　　5. Prevent interference: When receiving TV and radio, it is best to turn off the DVD player to prevent noise and snowflake interference.

　　6. Do a good job of hygiene: When cleaning the machine, avoid using volatile solvents and water, and wipe the machine with a dry cloth.

　　7. Correct connection: When connecting or removing any connection operation, the power should be turned off first. This avoids damage to the machine or other equipment associated with it.

　　8. Take care of the cable: When connecting or disconnecting the cable (including the AC power cord), you should grasp the connector to operate, but not the cable to avoid damage to the cable and electric shock. Non-professional maintenance personnel should not open the top cover of the machine to avoid electric shock and eye damage by the laser of the DVD player.

　　Third, the maintenance of speakers

　　The speaker is the terminal of the home theater sound. The quality of the system has a great influence on the sound quality. In order to reduce the attenuation of the lead wire to the signal, the thick special speaker wire should be used as far as possible to connect. When wiring, the positive and negative connections should not be reversed. When using, the volume of the power amplifier should not be turned too high to avoid overloading the speaker.

　　Fourth, the use and adjustment of AV amplifier

　　The AV amplifier is the core equipment of the home private theater system. It has many functions and complicated adjustment. Therefore, it is necessary to master the correct use method. The first thing you should know in the operation of the amplifier with Dolby Pro Logic decoding is that the Dolby Surround sound field can be restored only by playing a video disc recorded with Dolby Surround Sound. At this time, the directional logic state can be selected through the surround mode switch, and the center mode can be selected according to the configuration of the speakers. For example, the standard mode is suitable for ordinary non-full-range center speakers; the broadband mode is suitable for center speakers without center speakers. , ghost mode should be selected. However, ordinary stereo audio-video discs can only use the digital sound field effect processing of the power amplifier, that is, the DSP power amplifier, to simulate the cinema effect, such as widescreen movies and mono movies. Another place is to play different styles of laser discs or discs, and the AV amplifier can simulate different sound field effects, such as concert hall, live, rock, church, jazz, stadium, etc., which can be selected by the surround effect selection switch. set up.

　　Fifth, the placement of the equipment should be correct

　　1. It should be placed in a ventilated, cool, dry and clean place, avoiding direct sunlight.

　　2. It should be kept away from the transformer to avoid buzzing and noise pollution.

　　3. In order to ensure good ventilation and heat dissipation, it is best to leave a space of about 30cm on the top of the amplifier, and a space of about 20cm on the left and right sides and the rear.

　　4. Magnetic objects should be avoided around the speaker. If it is not an anti-magnetic speaker, do not place it near the sides of the TV. Due to the different magnetic field strengths of different speaker unit magnets, there is no definite safe distance, but generally it is more than 50cm away from the TV.

　　5. Try not to place objects with liquids above the equipment, such as decorative vases and fish tanks.

　　Six, pay attention to a few points when using

　　1. For maintenance reasons, many friends will cover the home theater equipment with a dust cover. The cooling holes of most power amplifiers are located on the top of the machine, so the dust cover should be removed during use to improve the heat dissipation effect.

　　2. Most of the home theater equipment has a very small power during standby, generally less than 0.1 watts/hour, so it is possible to keep the home theater equipment in a standby state, especially in humid areas, the standby current helps keep the inside of the amplifier dry.

　　3. In thunderstorm weather, it is best to pull out the power plug of the equipment, just in case.

　　4. If the equipment is not used for a long time, the battery in the remote control should be taken out to avoid battery leakage and corrosion of the circuit board. Finally, be careful when cleaning. When cleaning the exterior of the equipment, do not use chemical solvents, but use a dry, clean, lint-free soft cloth.

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