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Troubleshooting

If you have any trouble using the A-933, look for a solution here. If you can’t resolve the issue yourself, contact your Onkyo dealer.

Power

Can’t turn on the A-933.

•Make sure that the power cord is properly plugged into the wall outlet.

•Unplug the power cord from the wall outlet, wait five seconds or more, then plug it in again.

•By default, pressing the A-933’s [STANDBY/ON] button once does not turn on all of the system components. You need to press the remote controller’s [ON] button again. Alternatively, you can set the A-933 so that all components

do turn on simultaneously (page 17).

The STANDBY indicator is flashing red.

•The amp protection circuit has been activated. Remove the power cord from the wall outlet immediately and contact your Onkyo dealer.

Audio

There’s no sound or it’s very quiet.

•When the A-933 is used as a power amplifier (MAIN IN indicator lights up blue), the sound from components con- nected to the preamp are output. To output the sound from a component that’s connected to the A-933, or to use the A-933 as a preamp, press the [MAIN IN] button for 3 seconds until the MAIN IN indicator goes off.

•Make sure that all audio plugs are pushed in all the way (page 11).

•Make sure that the inputs and outputs of all components are connected properly.

•Make sure that the polarity of the speaker cables is correct and that the bare wires are in contact with the metal part of each speaker terminal (page 12).

•Make sure that the correct input source is selected (page 17).

•If the STANDBY indicator is flashing green, press the remote controller’s [MUTING] button to unmute the A-933 (page 18).

•Make sure that none of the cables are bent, twisted, or damaged.

•Make sure that SPEAKERS A or B are selected. When only SPEAKERS A is selected (A indicator on), speakers connected to the SPEAKERS A terminals, and a connected subwoofer will output sound. When only SPEAKERS B is selected (B indicator on), speakers connected to the SPEAKERS B terminals, and a connected subwoofer will output sound.

•To use a turntable with a moving-coil (MC) type cartridge, you need a commercially available MC phono preamp (page 15).

Noise can be heard.

•Using cable ties to bundle audio cables with power cords, speaker cables, and so on may degrade the audio perfor- mance, so don’t bundle them together.

•An audio cable may be picking up interference. Try repositioning your cables.

The tone controls don’t work.

•If the TONE/DIRECT indicator is green, Direct mode is selected and the tone controls have no effect. Press the [TONE/DIRECT] button to select Tone mode. The TONE/DIRECT indicator will turn red (page 18).

Remote Controller

The remote controller doesn’t work.

•Make sure that the batteries are installed with the correct polarity (page 9).

•Install new batteries. Don’t mix different types of batteries or old and new batteries (page 9).

•Make sure that the remote controller is not too far away from the A-933 and that there’s no obstruction between the remote controller and the A-933’s remote control sensor (page 9).

•Make sure that the A-933 is not subjected to direct sunshine or inverter-type florescent lights. Relocate if necessary (page 9).

•If the A-933 is installed in a rack or cabinet with colored glass doors, the remote controller may not work reliably when the doors are closed (page 9).

Can’t control other components?

•If it’s an Onkyo component, make sure that the cable and analog audio cable are connected properly. Connecting

only an cable won’t work.

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Onkyo A-933 instruction manual Troubleshooting, Audio, Remote Controller
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A-933 specifications

The Onkyo A-933 is a high-performance integrated amplifier designed for audiophiles who demand superior sound quality and versatility from their audio equipment. With its classic design and modern technology, the A-933 stands out in the realm of home audio solutions.

At the heart of the Onkyo A-933 is a powerful amplification section that delivers a robust 80 watts per channel at 4 ohms, ensuring clear and dynamic sound reproduction suitable for various listening environments. The A-933 employs a discrete output stage to provide low distortion and high current capability, making it perfect for driving a wide range of speakers, including those that may be more demanding in terms of power.

One of the key features of the A-933 is its comprehensive connectivity options. It offers multiple analog inputs, including dedicated phono input for turntables, allowing users to enjoy their vinyl collection seamlessly. Additionally, the amplifier includes a variety of digital inputs, including optical and coaxial connections, making it compatible with a range of digital sources like CD players, televisions, and streaming devices.

To further enhance sound quality, the A-933 incorporates Onkyo’s high-current amplification technology, which optimizes power delivery and minimizes distortion. The amplifier also features customizable sound settings, including tone controls for bass and treble, allowing users to tailor their listening experience to their personal preferences.

Durability and build quality are also significant characteristics of the Onkyo A-933. It features a robust chassis designed to minimize interference and vibration, ensuring pure sound reproduction. The front panel is equipped with an easy-to-read display and intuitive controls, making operation straightforward for users of all experience levels.

Moreover, the A-933 supports various audio formats, thanks to its built-in USB digital input for high-resolution audio playback. Users can connect their computers or mobile devices to enjoy studio-quality sound from their digital music libraries.

Overall, the Onkyo A-933 integrated amplifier combines superior performance, versatile connectivity, and user-friendly features. It stands as a solid choice for those seeking to elevate their home audio systems, providing a rich and immersive listening experience that is sure to satisfy even the most discerning audiophiles.
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