AV Tuner Preamplifier (2018)
Dimensions: 440 x 185 x 411mm
Frequency response: 10Hz to 100kHz
Total harmonic distortion: less than 0.005%
Input sensitivity: 2.5mV (MM), 200mV (line)
Signal to noise ratio: 74dB (MM), 105dB (line)
Output: 1.2V (Pre out)
Digital inputs: coaxial, optical, USB, LAN, WiFi, BT
Video Connections: HDMI, component, composite
There are few technical issues which is very common we found in Marantz AV-7705 Network Preamplifier that we will discuss here:-
Power does not turn on / Power is turned off
Power does not turn on.
Check whether the power plug is correctly inserted into the power outlet. (v p. 97)
Power automatically turns off.
The sleep timer is set. Turn on the power again.
“Auto Standby” is set. “Auto Standby” is triggered when there is no operation for a set amount of time. To disable “Auto Standby”, set “Auto Standby” on the menu to “Off”.
The power to this unit does not turn off when you press the Power operation button. “ZONE2 On” or “ZONE3 On” appears on the display.
Power in either ZONE2 or ZONE3 is on. To turn off the power of this unit (standby), press the ZONE2 ON/OFF or ZONE3 ON/OFF button on the main unit or press the ZONE SELECT button on the remote control and select a zone before pressing the POWER button.
The power to this unit does not turn off when you press the Power operation button. “HEOS On” appears on the display.
A HEOS device on the same network is playing an input source from this unit. Stop playback on the HEOS device when turning this unit off (setting it to standby). The power of this unit will turn off automatically after around 20 minutes.
Display on this unit shows nothing
Display is off.
Set “Dimmer” on the menu to something other than “Off”.
When the sound mode is set to “Pure Direct”, the display is off.
No sound comes out
No sound comes out of speakers.
Check the connections for all devices.
Insert connection cables all the way in.
Check that input connectors and output connectors are not reversely connected.
Check cables for damage.
Check the speaker connections and configurations.
Check the connections for PRE OUT connectors. (v p. 45)
Check whether the audio device power is turned on. (v p. 80)
Check that a proper input source is selected. (v p. 99)
Adjust the volume. (v p. 100)
Cancel the mute mode. (v p. 100)
Check the digital audio input connector setting. (v p. 206)
Check the digital audio output setting on the connected device. On some devices, the digital audio output is set to off by default.
When a headphone is plugged into the PHONES jack on the main unit, sound is not output from the PRE OUT connector.
No sound comes out when using the DVI-D connection.
When this unit is connected to a device equipped with a DVI-D connector, no sound is output. Make a separate audio connection.
No sound comes out of a TV that is connected via HDMI.
Audio signals input to 7.1CH IN connectors on this unit cannot be output to the TV.
No sound comes out when selecting Tuner input.
This unit does not have built-in FM/AM tuner. Connect an external tuner to the TUNER inputs.
Desired sound does not come out
The volume does not increase.
The maximum volume is set too low. Set the maximum volume using “Limit” on the menu.
Appropriate volume correction processing is performed according to the input audio format and settings, so the volume may not reach the upper limit.
No sound comes out with the HDMI connection.
Check the connection of the HDMI connectors.
When outputting HDMI audio signals from the speakers of a power amp connected to this unit, set “HDMI Audio Out” in the menu to “AVP”. To output from the TV, set it to “TV”.
When using the HDMI Control function, check that the audio output is set to the AV amplifier on the TV. (v p. 151)
When an eARC function-compatible television is connected, television audio is not output from the speaker connected to this unit
eARC function settings may be required depending on the eARC function-compatible television you are using. Make sure eARC is set to on if this
setting exists on your television. For more information, check your television’s owner’s manual.
Make sure the input source of this unit is “TV Audio”.
The eARC function does not operate when the HDMI input connector is set to the “TV Audio” input source. To enable eARC function operation, remove
the HDMI input connector setting, then restart this unit and the television.
No sound comes out of a specific speaker.
Check that PRE OUT cables and speaker cables are properly connected.
Check that a selection other than “None” is set for the “Speaker Config.” setting in menu.
Check the “Assign Mode” setting in the menu.
When the sound mode is “Stereo” and “Virtual”, audio is only output from the front speakers and subwoofer.
Audio is not output from the surround back speaker if “Speaker Virtualizer” is set to “On” when “Speaker Config.” – “Surr. Back” is set to “1 spkr” in the menu.
Audio is not output from the front wide speaker if “Speaker Virtualizer” is set to “On”. (v p. 178)
When “Speaker Config.” – “Surr. Back” is set to “2 spkrs”, “Speaker Config.” – “Center” is set to “Large” or “Small”, and sound mode is set to “IMAX DTS”, surround audio is output from the surround back speaker. Audio is not output from the surround speaker.
No sound is produced from subwoofer.
Check the subwoofer connections.
Turn on the subwoofer’s power.
Set “Speaker Config.” – “Subwoofer” in the menu to “1 spkr” or “2 spkrs”. (v p. 230)
When “Speaker Config.” – “Front” in the menu is set to “Large”, depending on the input signal and the sound mode, no sound may be output from the subwoofer.
When no subwoofer audio signal (LFE) is included in the input signals, no sound may be output from the subwoofer.
You can make the subwoofer always output sound by setting the “Subwoofer Mode” to “LFE+Main”.
DTS sound is not output.
Check that the digital audio output setting on the connected device is set to “DTS”.
Dolby Atmos, Dolby TrueHD, DTS-HD, Dolby Digital Plus audio is not output.
Make HDMI connections. Check the digital audio output setting on the connected device. On some devices, “PCM” is set by default.
DTS Neural:X mode cannot be selected.
DTS Neural:X cannot be selected when using the headphones.
Dolby Surround mode cannot be selected.
Dolby Surround cannot be selected when using the headphones.
IMAX DTS:X cannot be selected.
IMAX DTS:X and IMAX DTS cannot be selected but DTS:X and DTS can be selected, when the headphones are used.
Sound modes other than “Stereo” or “Direct” cannot be selected.
Only “Stereo” or “Direct” can be selected for the sound mode if Headphone:X signals are input.