Yamaha AX-397 - Инструкция по эксплуатации - Страница 18

TROUBLESHOOTING

16

Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below or 
if the instructions below do not help, set this unit to the standby mode, disconnect the power cord, and contact the nearest 
authorized YAMAHA dealer or service center.

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General

TROUBLESHOOTING

Problem

Cause

Remedy

Refer to 

page

This unit fails to turn 
on.

The power supply cord is not connected or 
the plug is not completely inserted.

Connect the power supply cord firmly.

—

The impedance setting is incorrect.

Set the impedance to match your speakers.

7

The protection circuitry has been activated 
because of a short circuit, etc.

Check that the speaker wires are not touching each 
other and then turn the power of this unit back on.

8

The IMPEDANCE SELECTOR switch on 
the rear panel is not set to either end.

Set the IMPEDANCE SELECTOR switch to either 
end when the power of this unit is turned off.

7

This unit has been exposed to a strong 
external electric shock (such as lightning 
or strong static electricity).

Set this unit to the standby mode, disconnect the 
power supply cord, plug it back in after 30 seconds, 
then use it normally.

—

No sound

Incorrect input or output cable 
connections.

Connect the cables properly. If the problem persists, 
the cables may be defective.

8

No appropriate input source has been 
selected.

Select an appropriate input source with the INPUT 
selector on the front panel (or one of the input 
selector buttons on the remote control).

11

The TAPE MONITOR function is turned 
on.

Turn off the TAPE MONITOR function.

4

The SPEAKERS A/B switches are not set 
properly.

Set the corresponding SPEAKERS A or B switch to 
the ON position.

11

Speaker connections are not secure.

Secure the connections.

8

The sound suddenly 
goes off.

The protection circuitry has been activated 
because of a short circuit, etc.

Check that the IMPEDANCE SELECTOR setting is 
correct.

7

Check that the speaker wires are not touching each 
other and then turn the power of this unit back on.

8

Only the speaker on 
one side can be 
heard.

Incorrect cable connections.

Connect the cables properly. If the problem persists, 
the cables may be defective.

8

Incorrect setting for the BALANCE 
control.

Set the BALANCE control to the appropriate 
position.

13

There is a lack of bass 
and no ambience.

The + and – wires are connected in 
reverse at the amplifier or the speakers.

Connect the speaker wires to the correct + and – 
phase.

8

A “humming” sound 
can be heard.

Incorrect cable connections.

Connect the audio plugs firmly. If the problem 
persists, the cables may be defective.

8

No connection from the turntable to the 
GND terminal.

Make the GND connection between the turntable and 
this unit.

8

The volume level is 
low while playing a 
record.

The record is being played on a turntable 
with an MC cartridge.

The turntable should be connected to this unit through 
the MC head amplifier.

—

The volume level 
cannot be increased, 
or the sound is 
distorted.

The component connected to the TAPE 
OUT or the MD OUT terminals of this 
unit is turned off.

Turn on the power of the component.

—