TOA Electronics AM-821 instruction manual Trouble-Shooting, Remedy

Page 9

TROUBLE-SHOOTING

Check the following points before you think there is a failure.

Are the remote microphone and other equipment properly connected to the AM-821 ? Is a power cord not plugged in ?

Are switches and volume controls placed in the right position ?

SYMPTON

CAUSE

REMEDY

A tape does not travel.

A tape is loaded improperly.

Remove a tape and load properly.

 

Control buttons are pushed while the

Set the auto switch to OFF.

 

auto switch is set to ON.

 

 

The auto switch is set to OFF and

Set the auto switch to ON when the

 

cassette tape motion is not activated

external timer is used.

 

by the external timer.

 

No output signal is

Output cord is connected improperly.

Connect a cord correctly.

delivered.

A headphone plug is inserted.

Detach a headphone plug.

 

A microphone picks up surrounding

Set the microphone switch to OFF.

 

noise.

 

Cannot record.

Tape's erasure prevention tab has

Replace a tape or cover a tab

 

been broken off.

opening with adhesive tape.

 

A Head is dirty.

Clean a head.

 

A microphone is connected

Connect a microphone correctly.

 

improperly.

 

High frequencies are

A Head is dirty.

Clean a head.

weak.

A Head is magnetized.

Demagnetize a head.

Sound is unsteady.

A capstan is dirty.

Clean a capstan and a pinch roller.

Excessive noise.

A tape is old.

Replace a tape.

A tape does not stop

Noise is high in unrecorded sound

Record again.

automatically.

section.

 

 

Period of time of unrecorded sound

 

 

section is short.

 

A tape is not rewound

Noise is high in unrecorded sound

automatically.

section.

 

Period of time of unrecorded sound

 

section is short.

 

The auto switch is set to OFF.

Paging through a

Microphone output level is too low.

microphone does not take

 

precedence.

 

Pre-recorded message

Recording level is too low.

does not take precedence

 

of background music.

A Head is dirty.

 

A tape is old.

Record again.

Set the auto switch to ON.

Use a microphone with high sensitivity.

Record again by using a microphone with high sensitivity. Clean a head.

Replace a tape and record again.

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Image 9
Contents Spot Announcing Machine Contents FeaturesGeneral Description Cleaning the Front Panel PrecautionsUser Care Handling Cassette TapesPart Description Auto SwitchConnections Connects to a power cordTransmitted to the amplifier Recording ProcedureConfirmation of Recording Completed Tape After Recording ProcedureMicrophone Paging and Order of Priority Manual modeRemedy TROUBLE-SHOOTINGSpecifications Dimensions mm TOA Corporation

AM-821 specifications

The TOA Electronics AM-821 is a state-of-the-art digital amplifier that has gained recognition in the audio industry for its exceptional performance and innovative features. Designed for various professional applications, the AM-821 is particularly suited for public address systems, commercial sound reinforcement, and various installations in schools, auditoriums, and venues requiring high-quality audio.

One of the standout features of the AM-821 is its robust power output. With a maximum output of 120 watts per channel at 4 ohms, it ensures reliable sound distribution in larger spaces without distortion. The amplifier is engineered to handle a wide range of audio signals, making it versatile for different sound sources. It is equipped with a built-in mixer that allows for control of microphones and other audio inputs, making it ideal for live events or permanent installations.

The AM-821 incorporates advanced technologies such as digital signal processing (DSP) which enhances sound quality and provides precise control over audio characteristics. This technology allows users to adjust equalization settings, loudness, and delay, ensuring crystal-clear sound that adapts to the environment. In addition, the amplifier features a low-noise cooling system that enhances its efficiency, prolonging the lifespan of the equipment while remaining quiet during operation.

Another essential characteristic of the AM-821 is its user-friendly interface. It includes intuitive controls and LED indicators that facilitate easy operation and monitoring of performance. The amplifier offers multiple input options, including XLR, RCA, and 1/4-inch jacks, providing flexibility for various audio setups. Its compatibility with TOA’s other products creates a cohesive and scalable system for users looking to expand their audio capabilities over time.

The robust build quality and sleek design of the AM-821 make it not only a powerful performer but also an aesthetically pleasing addition to any audio setup. Its compact form factor allows for easy integration into existing systems without occupying excessive space.

In summary, the TOA Electronics AM-821 amplifies modern audio solutions through its powerful output, advanced digital processing technologies, user-friendly interface, and versatile connectivity options. Ideal for professionals seeking quality, reliability, and versality, the AM-821 demonstrates TOA’s commitment to excellence in audio engineering.