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Troubleshooting - Yamaha YHT-380 Owner's Manual

Natural sound stereo integrated amplifier
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TROUBLESHOOTING

If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple
measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and
contact your authorized YAMAHA dealer or service center for help.
SYMPTOM
The unit fails to turn on when the POWER
switch is pressed.
No sound.
The sound suddenly goes off.
Only one side speaker outputs the sound.
There is a lack of bass, and no ambience.
Sound "hums".
Sound level is low.
Using the BASS, TREBLE, BALANCE and
LOUDNESS controls does not affect the
tone of CD input source.
The volume level cannot be increased, or
sound is distorted.
The remote control transmitter does not
work.
CAUSE
Power cord is not plugged in or is not
completely inserted.
Incorrect output cord connections.
Appropriate input source is not selected.
Speaker connections are not secure.
The protection circuit has activated because
of short circuit etc.
Incorrect setting of the BALANCE control.
Incorrect cord connections.
The + and – wires are connected in reverse
at the amplifier or speakers.
Incorrect cord connections.
No connection from the turntable to the GND
terminal.
The LOUDNESS control is functioning.
The CD DIRECT switch is ON.
The power to the component connected to
the REC OUT terminals of this unit is off.
Direct sunlight or lighting (of an inverter type
of flourescent lamp etc.) is striking the
remote control sensor of the main unit.
The batteries of this remote control
transmitter are too weak.
REMEDY
Firmly plug in the power cord.
Connect the cords properly. If the problem
persists, the cords may be defective.
Select an appropriate input source with the
input selector buttons.
Secure the connections.
Turning the unit off and then on will reset the
protection circuit.
Adjust it to the appropriate position.
Connect the cords properly. If the problem
persists, the cords may be defective.
Connect the speaker wires in the correct
phase (+ and –).
Firmly connect the audio plugs. If the
problem persists, the cords may be defective.
Make the GND connection between the
turntable and this unit.
Set the LOUDNESS control to the FLAT
position.
The CD DIRECT switch must be switched
OFF to use those controls.
Turn the power to the component on.
Change position of the main unit.
Replace the batteries with new ones.
11

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This manual is also suitable for:

Ax-380