Denon AVR-3801 manual Protector circuit

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Protector circuit

•This unit is equipped with a high-speed protection circuit. The purpose of this circuit is to protect the speakers under circumstances such as when the output of the power amplifier is inadvertently short-circuited and a large current flows, when the temperature surrounding the unit becomes unusually high, or when the unit is used at high output over a long period which results in an extreme temperature rise.

When the protection circuit is activated, the speaker output is cut off and the power supply indicator LED flashes. Should this occur, please follow these steps: be sure to switch off the power of this unit, check whether there are any faults with the wiring of the speaker cables or input cables, and wait for the unit to cool down if it is very hot. Improve the ventilation condition around the unit and switch the power back on.

If the protection circuit is activated again even though there are no problems with the wiring or the ventilation around the unit, switch off the power and contact a DENON service center.

Note on speaker impedance

•The protector circuit may be activated if the set is played for long periods of time at high volumes when speakers with an impedance lower than the specified impedance (for example speakers with an impedance of lower than 4 Ω /ohms) are

connected. If the protector circuit is activated, the speaker output is cut off. Turn off the set’s power, wait for the set to cool down, improve the ventilation around the set, then turn the power back on.

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Contents AVR-3801 Page Safety Precautions Safety Instructions Table of Contents Before UsingFeatures Connecting the audio components ConnectionsConnecting video components Connecting a monitor TV Connecting a video component equipped with S-Video jacksPrecaution when using S-jacks Connecting the video decksConnecting the antenna terminals AM loop antenna assembly FM antenna adopter assemblyConnecting a DVD player DVD in jacks Connecting a monitor TV Monitor OUT jackConnecting the external input EXT. in jacks Connecting the Multi Zone jacksSpeaker system connections Connecting banana plugsPrecautions when connecting speakers ConnectionsProtector circuit Front Panel Surround speaker system indicatorsPart Names and Functions Surround Speaker A/BRemote control unit DISPLAY/SURR. ParaPress this to display the system setup menu Setting UP the SystemSystem Setup button Cursor buttonsSurround speaker selector function Setting the type of speakers Before setting up the systemSetting the power amplifier assignment Parameters Subwoofer mode Setting the Subwoofer modeAssignment of low frequency signal range OFF Setting the delay timeSetting PreparationsSelect the speaker to be set Delay Time screen appears automaticallyOnce Meters or Feet is selected in , Set the distance betweenSetting the channel level Switch to the Channel Level screen Select Test Tone ModeIs the same Select Test Tone StartSelect Yes To select the digital input jack Setting the Digital In AssignmentTo select the input source Switch to the On Screen Display screen Select on or OFF Setting the on-screen display OSDSet the multi pre-out output level adjustment Multi Vol. LevelAuto tuner presets Press the Enter button Auto Preset Memory screen appearsAfter completing system setup On-screen display signalsInserting the batteries Remote Control UnitUsing the remote control unit MD recorder MD, CD recorder CDR system buttons Operating Denon audio componentsCD player CD system buttons Tape deck Tape system buttonsCode no ResetEnter Code LearnChecking the preset memory settings Operating a component stored in the preset memoryOperate the component Learning function System call Storing system call signalsSYS Mode System call buttonsResetting the system call buttons ResettingUsing the system call function SYS Mode SYS Call Reset PRE Reset LRNReset ALL Reset SYS Resetting the preset memoryResetting learned buttons All reset function Auto search function Before operating Turn on the power Press the Power switch buttonOperation Refer to Connections pages 6 to 13 and check that allPlaying the input source To select the input source when RECInput mode selection function Select the input source to be playedExample Stereo Input mode displayInput signal display After starting playback Adjusting the sound quality ToneListening over headphones Turning the sound off temporarily MutingChecking the currently playing program source, etc Playing one source while recording another REC OUT modeMulti-source recording/playback Select Multi using Display switches as follows eachThis operation is not possible in the REC OUT mode Multi source switchesSet the external input EXT Playback using the external input EXT. in jacksPress the EXT. in to switch External input ModeMulti-source and multi-zone playback Multi Room Music Entertainment SystemSurround Before playing with the surround functionDolby Surround Pro Logic mode Fader functionSignal Detect indicator lights Set the input mode to Auto or DTSSelect the Dolby/DTS Surround mode When playing sources On whichCOMP. Dynamic Range Compression 7.1 SurroundSurround parameters q Cinema EQ. Cinema Equalizer LFE Low Frequency EffectPersonal Memory Plus Surround modes and their featuresDSP Surround Simulation DSP surround simulation Set the parametersPress the Surround Parameter button When turned clockwiseWhen turned counterclockwise Tone control setting Cinema MusicListening to the Radio Auto tuningManual tuning TunerPreset memory Checking the preset stationsInitialization of the Microprocessor Recalling preset stationsLast Function Memory Troubleshooting Movie audio Types of multi-channel signalsAdditional Information Surround back speakers Number of surround back speakersSpeaker setting examples When using different surround speakers for movies and music When not using surround back speakers2Dolby Digital and Dolby Pro Logic SurroundDolby Surround Dolby Digital Dolby Surround AC-3 Dolby Digital compatible media and playback methodsDolby Pro Logic compatible media and playback methods DTS Digital SurroundDolby Pro Logic DTS compatible media and playback methodsDTS Neo6TM surround DTS-ESTMDiscreteDTS-ESTMMatrix DTS Neo6 CinemaSurround modes and parameters DVD VDP Tape TV/DBS VCR-1 VCR-2Specifications 14-14, Akasaka 4-CHOME, MINATO-KU, Tokyo 107-8011, Japan