Denon AVR-981 ユーザーズマニュアル

48

If this unit is not operating properly, check the items listed in the table below. Should the problem persist, there may be a malfunction. 
Disconnect the power immediately and contact your store of purchase.

Symptom

Cause

Measures

Page

When playing records

DISPLAY not lit and sound not produced
when power switch set to on.

• Power cord not plugged in securely.

• Check the insertion of the power cord plug.
• Turn the power on with the remote control

unit after turning the POWER switch on.

6

31

DISPLAY lit but sound not produced.

• Speaker cords not securely connected.
• Improper position of the audio function

button.

• Volume control set to minimum.
• MUTING is on.
• Digital signals not input Digital input

selected.

• Connect securely.
• Set to a suitable position.

• Turn volume up to suitable level.
• Switch off MUTING.
• Input digital signals or select input jacks to

which digital signals are being input.

10, 11

32

33
34
32

DISPLAY not lit and power indicator is
flashing rapidly.

• Speaker terminals are short-circuited.

• Block the ventilation holes of the set.

• The unit is operating at continuous high

power conditions and/or inadequate
ventilation.

• Switch power off, connect speakers

properly, then switch power back on.

• Turn off the set’s power, then ventilate it

well to cool it down.
Once the set is cooled down, turn the
power back on.

• Turn off the set’s power, then ventilate it

well to cool it down.
Once the set is cooled down, turn the
power back on.

10, 11

4, 5

4, 5

Sound produced only from one channel.

• Incomplete connection of speaker cords.
• Incomplete connection of input/output

cords.

• Connect securely.
• Connect securely.

10, 11

6 ~ 11

Positions of instruments reversed during
stereo playback.

• Reverse connections of left and right

speakers or left and right input/output
cords.

• Check left and right connections.

10, 11

The on screen display is not displayed.

• “On screen display” is set to off on the

system setup menu screen.

• Set “on screen display” on the system

setup menu screen to on.

22

Humming noise produced when record is
playing.

• Ground wire of turntable not connected

properly.

• Incomplete PHONO jack connection.
• TV or radio transmission antenna nearby.

• Connect securely.

• Connect securely.
• Contact your store of purchase.

6

6

—

Howling noise produced when volume is
high.

• Turntable and speaker systems too close

together.

• Floor is unstable and vibrates easily.

• Separate as much as possible.

• Use cushions to absorb speaker vibrations

transmitted by floor. If turntable is not
equipped with insulators, use audio
insulators (commonly available).

—

—

Sound is distorted.

• Stylus pressure too weak.
• Dust or dirt on stylus.
• Cartridge defective.

• Apply proper stylus pressure.
• Check stylus.
• Replace cartridge.

—
—
—

Volume is weak.

• MC cartridge being used.

• Replace with MM cartridge or use a head

amplifier or step-up transformer.

6

This unit does not operate properly when
remote control unit is used.

• Batteries dead.
• Remote control unit too far from this unit.
• Obstacle between this unit and remote

control unit.

• Different button is being pressed.
• < and > ends of battery inserted in reverse.

• Replace with new batteries.
• Move closer.
• Remove obstacle.

• Press the proper button.
• Insert batteries properly.

23
23
23

—

23

Remote control

unit

Common problems when listening to the CD, records, tapes and FM broadcasts, etc.