Denon AVR-1905, Руководство по эксплуатации

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40
ENGLISH
17 TROUBLESHOOTING
If a problem should arise,first check the following.
1. Are the connections correct ?
2. Have you operated the receiver according to the Operating Instructions ?
3. Are the speakers, turntable and other components operating property ?
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
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.
5
19
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.
8, 9
20
20
22
20
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.
8, 9
5, 8
5, 8
Sound produced only
from one channel.
• Incomplete connection of speaker cords.
• Incomplete connection of input/output
cords.
• Connect securely.
• Connect securely. 8, 9
5 ~ 9
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. 9
Common problems when listening to the CD, records, tapes and FM broadcasts, etc.
Symptom Cause Measures Page
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.
5
5
—
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.
5
When playing records
Remote control unit
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.
10
10
10
—
10