Denon AVR-990 Owner's Manual page 99

Troubleshooting
If a problem should arise, first check the following:
1. Are the connections correct?
2. Is the set being operated as described in the owner's manual?
3. Are the other components operating properly?
If this unit does not operate properly, check the items listed in the table below. Should the problem persist,
there may be a malfunction.
In this case, disconnect the power immediately and contact your store of purchase.
GGeneralH
Symptom Cause / Countermeasure
Set does not operate • Reset the microprocessor.
properly.
Power does not • Check that the power plugs are securely inserted into the AVR-
turn on, or turns off 990's AC inlet and the wall power outlet.
directly after it was
turned on.
No sound is produced • Check the connections to the input devices and the speaker cable
from speakers. connections.
• Check the connections to the playback devices and select the
appropriate input source.
• Adjust the master volume to an appropriate level.
• Cancel the mute mode.
• Disconnect the headphones. No sound is output from the speakers
or the PRE OUT terminals when headphones are connected.
• Select an input source for which the digital input setting has been
made.
• Match the terminal to which the digital input terminal is assigned
with the input mode.
Display is off. • Set the dimmer function to a setting other than "OFF".
• Cancel the PURE DIRECT mode. The display turns off when in
the Pure Direct mode.
"DOLBY DIGITAL " • Check the Blu-ray Disc player / DVD player's audio output setting.
indicator does not For details, read the Blu-ray Disc player / DVD player's operating
appear on display. instructions.
Symptom
Power switches • The protection circuit will be activated depending upon the
off suddenly while temperature rise in the internal parts of the unit. Please switch off
you are using the power at once, and re-apply the power after the body temperature
AVR-990, the power has fallen sufficiently.
indicator will flash • Please re-install AVR-990 in a place having good ventilation.
in red at intervals
of approximately 2
seconds.
Page
Power switches • Please use speakers which have the specified impedance.
off suddenly while • The protection circuit has been activated because the core wires
99
you are using the of different speaker cables have touched each other or a core
AVR-990, the power wire has slipped out of the terminal and is touching the AVR-990's
23
indicator will flash rear panel. Unplug the power cord, then after twisting the core
red at intervals of wires together tightly again, or effecting termination treatments
approximately 0.5 etc, please reconnect once again.
seconds.
12 ~ 22
Even applying • The AVR-990 amplifier circuit has failed. Switch off the power and
power, the power please contact the DENON service adviser.
13 ~ 23, 26
display flashes
red at intervals of
65
approximately 0.5
65
seconds.
65
45, 46
GRemote Control UnitH
Symptom
48
Set does not work • Batteries are worn. Replace with new batteries.
properly when remote • Operate the remote control unit within a distance of about 7 m
42
control unit operated. from the AVR-990 and at an angle of within 30°.
68
• Remove the obstacle between the AVR-990 and the remote
control unit.
–
• Insert the batteries in the proper direction, checking the q and
w marks.
• The set's remote control sensor is exposed to strong light (direct
sunlight, inverter type fluorescent bulb light, etc.). Move the set
to a place in which the remote control sensor will not be exposed
to strong light.
• Make sure the remote control IDs of the main unit and remote
control unit match.
• Set the remote control unit's function button properly.
Cause / Countermeasure
Cause / Countermeasure
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