Luxman C-900u, Руководство пользователя, Страница: 33 / 36

CONTROL AMPLIFIER C-900u
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Before Asking for Repair Services
While the unit is used, an unusual phenomenon may be confused as a malfunction for a certain reason. Prior to asking us for repair
services, please check the table below and read the instruction manual for the subsidiary devices. If the cause of the malfunction can-
not be identified, please contact your dealer.
Problem Cause Solution
No power is supplied even
though the main power switch
is pressed.
The standby indicator does not
light. · The power plug is disconnected from the
wall outlet, or it is not completely inserted.
· Insert the power plug in the wall outlet com-
pletely.
· The power plug is disconnected from the
AC inlet, or it is not inserted completely.
· Securely insert the power plug in the AC
inlet.
The operation indicator does
not light even though the opera-
tion switch is pressed. · The main power switch is turned off. · Turn on the main power switch to light the
standby indicator.
No sound is generated. · The volume control or attenuator of the
power amplifier is set to the minimum level. · Rotate the volume control or attenuator of
the power amplifier to adjust the sound vol-
ume.
· The input selector is not set to the source to
be reproduced.
· Set the input selector to the source to be
reproduced.
· The connected output terminal does not
match the selected output mode setting.
· Adjust the output mode of the connected
output terminal according to the selected
output mode.
· Cable connections are incomplete. · Make cable connections securely.
· The mute switch of the remote control is
set to ON.
· Set the mute switch to OFF.
· The external pre switch is set to ON. · Set the external pre switch to OFF.
Sound is generated but the
sound volume is low.
The sound volume is low only at
one side channel. · The balance control is rotated in a one-sid-
ed manner.
· The balance control shall be set to the cen-
ter position under normal conditions.
· The attenuator of the power amplifier is set
to ON.
· Set the attenuator to OFF.
Humming sound (boon or zzz
noise) is generated. · The grounding side of the connection cable
has no contact with the terminal.
· Make cable connections securely.
· Induction noise is picked up from the power
transformer of another device.
· Install it distant from other devices. Use a
wall socket of a different line.
· The input/output cables and speaker cables
are too close to the power cable.
· Keep the input/output cables and speaker
cables away from the power cable..
There is no effect of tone con-
trol. · The line straight switch is set to ON. · Set the line straight switch to OFF.