Onkyo Troubleshooting Guide for TX-8255 Receiver
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Troubleshooting

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

If you can’t resolve the issue yourself, try resetting the receiver before contacting your Onkyo dealer.

To reset the receiver to its factory defaults, turn it on and, while holding down the [LINE 2] button, press the [ON/STANDBY] button.

“Clear” will appear on the display and the receiver will enter Standby mode.

Note that resetting the receiver will delete your radio presets and custom settings.

Power

Can’t turn on the receiver

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

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

The STANDBY indicator is flashing

The amp protection circuit has been activated. Remove the power cord from the wall outlet immediately. Disconnect all speaker cables and input sources, and leave the receiver with its power cord disconnected for 1 hour. After that, reconnect the power cord and press the [ON/STANDBY] button again. If you can not resolve the problem, contact your Onkyo dealer.

Audio

There’s no sound or it’s very quiet

•Make sure the speaker set A or B is on (page 20).

•Make sure that all audio connecting plugs are pushed in all the way (pages 12-18).

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

•Make sure that the speaker cables are not shorting.

•Make sure that the inputs and outputs of all compo- nents are connected properly.

•Make sure that the correct input source is selected (page 20).

•If the MUTING indicator is shown on the display, press the remote controller’s [MUTING] button to unmute the receiver (page 21).

•If your turntable doesn’t have a phono preamp built- in, you must connect one between it and the receiver. If your turntable uses an MC cartridge, you must con- nect an MC head amp, or an MC transformer and a phono preamp.

Noise can be heard

•Using cable ties to bundle audio cables with power cords, speaker cables, and so on may degrade the audio performance, so don’t do it.

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

Tuner

Reception is noisy, stereo FM reception suffers from hiss, or the FM STEREO indicator doesn’t appear

•Relocate your antenna.

•Move the receiver away from your TV or computer.

•Listen to the station in mono (page 26).

•When listening to an AM station, operating the remote controller may cause noise.

•Passing cars and airplanes can cause interference.

•Concrete walls weaken radio signals.

•If nothing improves the reception, install an outdoor antenna.

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Contents TX-8255 Avis Important Safety InstructionsPower PrecautionsFCC Information for User Table of Contents Features Supplied AccessoriesInstalling the Batteries Front Panel Getting to Know the ReceiverOther Models Getting to Know the Receiver CD input Remote Control jacksRear Panel Phono MM input and grounding terminalDisplay Remote Controller Using the Remote Controller Remote ControllerStrip about 15 mm 5/8 Connecting Your SpeakersSpeaker Connection Precautions Connecting the Speaker CablesAttach the FM antenna, as shown North American Model Connecting AntennaConnecting the AM Loop Antenna Connecting the Indoor FM AntennaUsing a TV/FM Antenna Splitter Connecting AntennaConnecting an Outdoor FM Antenna Connecting an Outdoor AM AntennaBefore Making any Connections Connecting Your ComponentsConnecting a Turntable Connecting a CD PlayerConnecting a DVD Player Connecting Your ComponentsConnecting a Recording Component Connecting a Remote Interactive Dock RI DockRemote Control Operation Connecting aTV or Other Component with an Audio OutputConnecting Components Auto Power OnConnecting the Power Cord Connecting the Power Cords of Other ComponentsTurning On and Standby Turning On the ReceiverChanging the Input Display Start playback on the selected Enjoying Audio SourcesComponent Using the Sleep Timer remote controller only Muting the receiver remote controller onlySetting the Display Brightness Using HeadphonesAdjusting the Balance Using the Tone and Balance ControlsAdjusting the Bass Adjusting the TrebleRecording the Input Source RecordingMonitoring the Recorded Sound RecordingListening to the Radio AM Frequency Step Setup Not North America and EuropeListening to AM/FM Stations Listening to the Radio Presetting AM/FM StationsWhat is RDS? Using RDS European Models OnlyRDS Program Types PTY Finding Stations by Type PTY Displaying Radio Text RTListening to Traffic News TP Entering a Name Naming Preset Channels other than European modelCorrecting a Character Effective Sensor Layout If Remote Controller Signal Does not Reach Other ComponentsMaking Sensor Connections There’s no sound or it’s very quiet TroubleshootingStandby indicator is flashing Can’t turn on the receiverCan’t record TroubleshootingRemote controller doesn’t work Can’t control other componentsGeneral SpecificationsAmplifier Section Tuner SectionMemo Memo 3 4 4 8 1

TX-8255 specifications

The Onkyo TX-8255 is a versatile stereo receiver that combines classic design with modern audio technologies, catering to both audiophiles and casual listeners alike. Known for its rich sound quality and thoughtful features, the TX-8255 serves as an ideal hub for a home audio system.

At the heart of the TX-8255 are its 2-channel outputs, delivering a robust 100 watts per channel at 8 ohms. This power ensures that it can easily drive a range of speakers, allowing for a dynamic and immersive listening experience. The receiver supports multiple audio formats and provides a detailed soundstage, making it suitable for music, movies, and gaming.

One of the standout features of the TX-8255 is its comprehensive connectivity options. The receiver offers six line-level inputs, as well as a phono input for vinyl enthusiasts, allowing users to connect various audio sources such as CD players, turntables, and smartphones. In addition, two sets of speaker outputs facilitate a bi-wire setup or connection to two separate speaker systems.

The Onkyo TX-8255 also includes a tuner with AM and FM capabilities, enabling users to enjoy their favorite radio stations. The built-in presets make it easy to switch between favorite stations, while the high-quality tuner ensures clear reception even in areas with weak signals.

When it comes to audio technologies, the TX-8255 is equipped with Onkyo’s proprietary Wide Range Amplification Technology (WRAT). This innovative approach minimizes distortion and enhances the overall audio fidelity, ensuring that listeners experience music exactly as intended by the artist.

The design of the TX-8255 reflects a classic aesthetic, with a clean front panel and easy-to-use controls. The large rotary knobs and tactile buttons make operation intuitive, while the LED display provides clear information regarding the selected input and volume levels.

In addition to its performance capabilities, the TX-8255 is designed with energy efficiency in mind. The unit automatically enters a low-power standby mode after periods of inactivity, reducing energy consumption and minimizing its environmental impact.

Overall, the Onkyo TX-8255 epitomizes a balance between tradition and technological advancement, making it a top choice for anyone looking to enhance their audio experience while enjoying the simplicity and elegance of a classic stereo receiver. Whether you're an audiophile or simply enjoy quality sound, the TX-8255 is an excellent addition to any home audio setup.
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