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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. When taking the service, the
MDX-E300 or KX-E300 may be needed. For details, contact your authorized YAMAHA dealer or service center.
The unit does not switch ON when
the STANDBY/ON switch is pressed.
No sound from one speaker.
The sound suddenly goes off.
No sound from an external unit
connected with this unit or play does
not begin.
Sound distorted.
SYMPTOM CAUSE REMEDY
RX-E400 RECEIVER
Securely connect the power cord.
Connect properly.
Check the speaker wires are not touching each other
and then turn the unit back on.
Connect the cords properly. If the problem persists,
the cords may be defective.
Make a proper input source selection.
Connect the AC power cord of the component to an
AC outlet.
The AC power cord is not connected or not
completely connected.
Loose speaker connections.
The protection circuit has been activated
because of a short circuit, etc.
Incorrect cord connections.
Input source selection is not proper.
The component connected to this unit is
disconnected from AC outlet.
ADDITIONAL INFORMATION
Excessive static in FM broadcasts.
Noise increases during stereo
broadcasts.
Stereo broadcasts are noisy and
STEREO indicator blinks on and off.
Cannot select preset stations.
Buzzing or static during AM
broadcasts.
AM broadcast sensitivity is poor.
Cannot set timer.
The unit does not work normally.
Interference from starting motor of a nearby
car.
Interference from the thermostat of a nearby
electrical appliance.
Antenna input is too weak due to obstructions
or excessive distance from the broadcasting
station.
Insufficient antenna input.
Preset memory has been erased.
Interference from sources such as lightning,
fluorescent lights, electric motors or thermostat
of nearby electrical appliance.
TV or microprocessor is being used nearby.
Radio signal is weak or the antenna is not
properly connected.
Current time is not set.
The internal microcomputer has been frozen
by an external electric shock (lightning,
excessive static electricity, etc.) or the power
supply with low voltage.
Position the FM antenna as high and as far away
from nearby roads as possible. Connect using a
coaxial cable.
Check the antenna connection.
Install a multi-element type FM antenna if possible.
Install an antenna appropriate for the electric field
strength of your area.
Reprogram memory presets.
The problem is difficult to eliminate, but can be
lessened by grounding AM loop antenna.
Move away from TV or microprocessor.
Properly connect the AM loop antenna.
Change orientation of the AM loop antenna.
Install an external AM loop antenna.
Set current time.
Unplug the AC power cord from the wall outlet, and
then plug in again after about one minute.
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