Before Asking For Repair Services - Luxman C-900u Owner's Manual

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