Troubleshooting, Audio, Remote Controller

Troubleshooting

If you have any trouble using the A-9755/A-9555, look for a solution here. If you can’t resolve the issue yourself, contact your Onkyo dealer.

Power

Can’t turn on the A-9755/A-9555.

•Make sure that the power cord is properly plugged into the wall outlet. (page 5)

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

•By default, pressing the remote controller’s [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-9755/A-9555 so that all

components do turn on simultaneously (page 14).

The STANDBY indicator is ﬂashing.

•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-9755 is used as a power ampliﬁer (MAIN IN indicator lights up), the sound from components connected to the preamp is output. To output the sound from a component that’s connected to the A-9755, or to use the A-9755 as a preamp, press the [POWER AMP DIRECT (MAIN IN)] button for 3 seconds until the MAIN IN indicator goes off. (page 17)

•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 10).

•Make sure that the correct input source is selected (page 15).

•If the Volume indicator ﬂashes slowly, press the remote controller’s [MUTING] button to unmute the A-9755/A-9555 (page 15).

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

•To use a turntable with a moving-coil (MC) type cartridge, you need a commercially available MC phono preamp (page 11).

•If the Volume indicator ﬂashes quickly, any speakers may not be connected to the A-9755/A-9555. Make sure that the required connection is performed appropriately, and set the [POWER] switch to the ON position again (pages 10, 14).

•Verify if the SPEAKERS selector is conﬁgured correctly. If “OFF” is selected, no sound will be output from any of the speakers (page 14).

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 have no effect.

•If the PURE DIRECT indicator lights up, the PURE DIRECT function is on and the tone controls have no effect. Press the [PURE DIRECT] button to turn the function off. The PURE DIRECT indicator will go off (page 16).

Remote Controller

The remote controller doesn’t work.

•Make sure that the batteries are installed with the correct polarity (page 5).

•Install new batteries. Don’t mix different types of batteries or old and new batteries (page 5).

•Make sure that the remote controller is not too far away from the A-9755/A-9555 and that there’s no obstruction between the remote controller and the A-9755/A-9555’s remote control sensor (page 9).

•Make sure that the A-9755/A-9555 is not subjected to direct sunshine or inverter-type ﬂorescent lights. Relocate if necessary (page 9).

•If the A-9755/A-9555 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. (page 13)

A-9755, 9555 specifications

The Onkyo 9555 and A-9755 are two notable models in the world of high-fidelity audio, representing a blend of technological innovation and classic design principles that appeal to audiophiles and casual listeners alike.

The Onkyo 9555 integrates a powerful amplifier with advanced features suitable for both home theater systems and stereo setups. One of its main highlights is the incorporation of a high-current amplifier design, which ensures optimal driving power for various speakers, making it capable of delivering clear sound even at high volumes. With a RMS power output typically ranging from 50 to 100 watts per channel, it provides a robust performance that can fill larger rooms with immersive audio.

Equipped with a range of input options including digital coaxial and optical inputs, as well as traditional analog connections, the Onkyo 9555 offers flexibility for connecting multiple audio sources. The inclusion of a built-in phono stage also allows for direct connection of turntables, catering to vinyl enthusiasts who appreciate the warmth and character of analog sound. The model features customizable equalization settings, enabling users to tailor their listening experience to personal preferences or room acoustics.

Similarly, the A-9755 carries forward Onkyo’s commitment to superior sound quality, further enhancing user experience with its sophisticated circuitry. Notably, the A-9755 employs a highly precise 192 kHz/24-bit DAC, elevating digital audio playback to a new level of clarity and detail. This is complemented by a variable loudness control, which adjusts frequency response based on listening levels, ensuring consistent sound quality whether you're enjoying soft background music or cranking up the volume for a party.

Both models are designed with solid build quality and user-friendly interfaces, often featuring rotary knobs and clearly labeled buttons that enhance usability. Additionally, the aesthetically pleasing design fits well in both modern and traditional environments.

In conclusion, the Onkyo 9555 and A-9755 are strong contenders in the high-fidelity audio market, offering powerful amplification, versatile input options, and advanced technologies catering to diverse listening preferences. Whether for critical listening or casual enjoyment, these models are worthy of consideration for anyone looking to elevate their audio experience.