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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 cannot be identified, please contact your dealer.
Problem
No power is supplied even
though the operation switch is
pressed ON.
No sound is generated.
No sound comes out on one
side.
Humming sound (boon or zzz
noise) is generated.
No effect of tone control or bal�
ance control is observed.
The light of the power meter is
not turned on.
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 volume control is set to the minimum
level.
· The input selector is not set in the playback
source position.
· Cable connections are incomplete.
· The output level of the input device is set to
the minimum position.
· The separate switch is set to on.
· The balance control is fully rotated.
· The connecting cable is not connected on
one side only.
· The ground side of the pin�plug cable has
no contact with the terminal.
· The ground wire of the record player is not
connected.
· Connections or mounting conditions are in�
Connections or mounting conditions are in�
complete between the cartridge and shell,
or between the shell and tone arm of the
record player.
· The line straight switch is turned on.
· The display switch is set to off.
INTEGRATED AMPLIFIER L-507u
Solution
· Insert the power plug in the wall outlet se�
Insert the power plug in the wall outlet se�
curely.
· Insert the power plug in the AC inlet se�
Insert the power plug in the AC inlet se�
curely.
· Rotate the volume control clockwise to ad�
Rotate the volume control clockwise to ad�
just the sound volume.
· Set the input selector in the playback source
position.
· Make cable connections securely.
· Adjust the output level.
· Set the separate switch to off.
· The balance control shall be set to the cen�
The balance control shall be set to the cen�
ter position under normal conditions.
· Make cable connections securely.
· Make connections securely so that the
ground side of the pin�plug cable makes
contact with the terminal.
· Connect the ground wire of the record play�
er to the GND terminal.
· Connect (or mount) the cartridge, shell, and
tone arm securely.
· When tone control or balance control is
used, the line straight switch shall be set to
off.
· Set the display switch of the remote control
to on.
17
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