Onkyo Troubleshooting Your A-9070 Integrated Amplifier
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Troubleshooting

If you have any trouble using the integrated amplifier, look for a solution in this section.

If you can't resolve the issue yourself, try resetting the integrated amplifier before contacting your Onkyo dealer. To reset the integrated amplifier to its factory defaults, see “Restoring the Default Settings” (➔ page 40).

Power

Can’t turn on the Integrated Amplifier.

•Make sure that the power cord is properly plugged into the wall outlet (➔ page 16).

•Unplug the power cord from the wall outlet, wait 5 seconds or more, then plug it in again.

The Integrated Amplifier turns off unexpectedly.

•When the Auto Standby function is activated, the integrated amplifier will automatically enter Standby mode (➔ page 38).

•When the protection circuit is activated (because of speaker short-circuit, overload, or over-current), the integrated amplifier enters Standby mode. Remove the source of the problem and turn the integrated amplifier back on.

Audio

There’s no sound.

•Make sure the integrated amplifier’s volume control is not set to minimum (➔ page 27).

•Make sure the correct input source is selected (➔ page 28).

•Make sure the integrated amplifier is not muted (➔ page 31).

•Make sure the speakers are connected correctly (➔ page 13).

•Check all connections and correct as necessary (➔ page 13).

•While headphones are connected, the speakers and PRE OUT output no sound (➔ page 31).

•The integrated amplifier does not support digital formats other than PCM. Inputting a digital format other than PCM will cause loud noise.

•If “ROUTE” is set to anything other than “NORMAL”, make sure that each component is connected accordingly (➔ page 23 to 25, 39).

The sound quality is not good.

•Make sure the speaker cables are connected with the correct polarity (➔ page 13).

•Make sure all audio connecting plugs are pushed in all the way (➔ page 16).

•The sound quality can be affected by strong magnetic fields, such as those from a TV. Try moving any such devices away from the integrated amplifier.

•If you have any devices that emit high-intensity radio waves near the integrated amplifier, such as a cellular phone that’s being used to make a call, the integrated amplifier may output noise.

Headphone output is intermittent or there’s no sound.

•This may be due to dirty contacts. Clean the headphones plug. See your headphones’ instruction manual for cleaning information. Also, make sure that the headphones cable is not broken or damaged.

•Make sure that “ROUTE” is not set to “MAIN” (➔ page 39).

Audio performance

•Audio performance will be at its best about 10 to 30 minutes after the integrated amplifier has been turned on and had time to warm up.

•Using cable ties to bundle audio cables with speaker or power cables may degrade the sound quality, so refrain from doing it.

•Depending on the country, the integrated amplifier may be polarity-sensitive. In this case, plug the power cord in a way that provides the best sound quality.

•Install the integrated amplifier on a sturdy rack or shelf. Position it so that its weight is evenly dispersed on its four legs. Do not install the integrated amplifier in a place with vibration or an unstable location.

•Plug the power cord into an AC wall outlet.

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Contents 9070 Important Safety Instructions Precautions Power cord Supplied AccessoriesRemote controller and two batteries Features Contents Using the Remote Controller Before Using the Integrated AmplifierInstalling the Batteries Installing the Integrated Amplifier Front Panel Getting to Know the Integrated Amplifier8ON/STANDBY button Main in LEDTreble -/+ buttons L m n oRear Panel Remote Controller Connections Connecting Your SpeakersScrew-type speaker terminals Banana Plugs North American modelsYou can also output audio from both sets of speakers Tip Bi-wiring ConnectionCable and Jacks Connecting the Power CordAnalog Connection Connecting a CD PlayerDigital Connection Coaxial or Optical Integrated Amplifier A-9070 CD Player C-7070Digital Media Transport Connecting an Onkyo DockIntegrated Amplifier A-9070 Network Tuner T-4070 Connecting a TunerAuto Power On Connecting Onkyo u ComponentsRemote Control Direct ChangeConnecting a Cassette Tape Deck Connecting a TurntableConnecting a Recording Component Integrated Amplifier A-9070 Power Amplifier M-5000R Using the Integrated Amplifier as a PreamplifierGraphic equalizer Separating the Pre-amp and Main Amp UnitsPreamplifier P-3000R Integrated Amplifier A-9070 Using the Integrated Amplifier as a Power AmplifierBasic Operations Operating with the remote controllerTurning On/Off the Integrated Amplifier PressOperating on the integrated amplifier Adjusting the VolumeSelecting Speakers a and Speakers B Selecting the Input Source Adjusting the Display BrightnessUsing the Direct Function Press Bass -/+,TREBLE -/+, or Balance L/R Adjusting the Bass, Treble and BalanceChanging the Display Information Press Muting Using HeadphonesMuting the Sound Controlling the Onkyo CD Player Controlling Other Onkyo ComponentsRandom button Repeat buttonShuffle button Controlling the Onkyo DockAbout Onkyo Dock Input button Controlling the Onkyo Network Tuner#/$and Enter buttons Changing Input Names Custom SetupSkipping Unused Inputs Press #/$repeatedly to adjust the offset level Setting the Headphone LevelPress Setup Press !/repeatedly to select Hplvl Press Enter Press Setup Press !/repeatedly to select ASb Press Enter Setting the Auto Standby FunctionPress #/$to switch between ASb-ON and ASb-OFF ` ASb-ON ` ASb-OFFPress Setup Press !/repeatedly to select Route Press Enter Setting the RoutePress #/$repeatedly to select the route you want to set ` PREPress #/$to switch between RST-NO and RST-YES Restoring the Default SettingsPress Setup Press !/repeatedly to select Reset Press Enter Troubleshooting Remote controller doesn’t work properly Can’t control properly by using the remote controllerOther No sound is heard from a connected componentAudio Outputs SpecificationsAudio Inputs 4 0 0 8 4

A-9070 specifications

The Onkyo A-9070 is a high-performance integrated amplifier that caters to audiophiles seeking exceptional sound quality and versatile connectivity options. Designed with a blend of modern technological advancements and classic analog principles, the A-9070 stands out as a powerhouse in its category.

At the heart of the A-9070 is its high-current capability, which ensures the delivery of dynamic sound reproduction across a varied range of frequencies. This integrated amplifier boasts an impressive power output of 100 watts per channel at 8 ohms, allowing it to drive speakers effectively while maintaining clarity and precision. The use of Onkyo’s Wide Range Amplification Technology (WRAT) ensures that audio signals remain faithful to the original source. The A-9070's transistors are meticulously selected, contributing to enhanced thermal stability and reliability.

Another hallmark feature of the A-9070 is its dual toroidal transformers, designed to minimize unwanted magnetic interference and ensure a clean power supply. This design significantly improves overall audio performance, enhancing detail, dynamics, and transient response. The amplifier also integrates a signal-to-noise ratio of 100 dB, which promotes a silent background, allowing listeners to experience every nuance in their favorite tracks.

The Onkyo A-9070 comes equipped with a variety of analog and digital inputs, facilitating seamless connectivity with multiple devices. There are four line inputs, a phono input for vinyl enthusiasts, and an optical and coaxial digital input for connecting to modern sources. Furthermore, the amplifier features a high-quality DAC (Digital-to-Analog Converter) capable of handling high-resolution audio files, which makes it suitable for both traditional and contemporary audio formats.

Additionally, the A-9070 is designed with user convenience in mind. The front-panel controls are intuitively laid out, and a remote control is included for easy access to all functions. The amplifier also features a dedicated headphone output, allowing for private listening sessions without compromising audio quality.

In conclusion, the Onkyo A-9070 combines exquisite craftsmanship with advanced technology, making it a formidable choice for audio enthusiasts. Its powerful amplification, robust build quality, and diverse connectivity options offer an unparalleled listening experience that caters to both vintage and modern audio setups. Whether you’re spinning vinyl or streaming high-resolution tracks, the A-9070 is designed to deliver rich, immersive sound that brings music to life.
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