Yamaha EMX120CD - Manual (Page 51)

E-43
English
TROUBLESHOOTING
If your 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, 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.
CAUSE
AC supply lead is not plugged in.
There is an influence of strong external
noise (lightning, excessive static
electricity, etc.) or a misoperation on this
unit while using this unit.
The protection circuit has been activated
because of short circuit etc.
The SLEEP timer has functioned.
Loose speaker connections.
Speaker connections are not secure.
One rear speaker connection is loose or
bad.
The sound output level to the rear
speakers is set to minimum.
No sound field program is selected.
The sound output level to the center
speaker is set to minimum.
The center channel mode is in PHANTOM
mode.
Incorrect sound field program selection.
No sound field program is selected.
Incorrect cord connections.
Input source selection is not proper.
Current time is not set.
The internal microcomputer has been
frozen by an external electric shock
(lightning, excessive static electricity, etc.)
or power supply with low voltage.
The component connected to the
TAPE/MD OUT or VCR OUT terminals of
this unit is turned off.
This unit is in the standby mode.
Interference from starting motor of nearby
car.
Interference from thermostat of nearby
electrical appliance.
Antenna input is too weak due to
obstructions or excessive distance from
broadcasting station.
Insufficient antenna input.
Preset memory has been erased.
Interference from source 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 antenna is not
properly connected.
SYMPTOM
The unit fails to turn on when the
STANDBY/ON switch is pressed, or
turns into the standby mode suddenly
soon after the power is turned on.
It happens that this unit does not work
normally.
The sound suddenly goes off.
No sound from one speaker
No sound from speakers.
No sound from the rear speakers.
No sound from the center speaker.
No sound (or no picture) from an
external unit connected with this unit.
Can’t set timer.
This unit will not operate properly.
The volume level cannot be increased,
or sound is distorted.
The sound is degraded when listening
with the headphones connected to the
tape deck etc. that are connected with
this unit.
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.
REMEDY
Plug in the AC supply lead.
Turn this unit into the standby mode and disconnect
the AC power cord from the AC outlet. After about 30
seconds pass, connect the power and operate this
unit again.
Turn this unit into the standby mode, and then turn
on to reset the protection circuit.
Cancel the SLEEP timer function.
Connect properly.
Secure the connections.
Connect it properly.
Raise the sound output level to the rear speakers.
Select the appropriate program.
Raise the sound output level to the center speaker.
Select NORMAL mode.
Select the appropriate program.
Connect the cords properly. If the problem persists,
the cords may be defective.
Make a proper input source selection.
Set current time.
Unplug the AC supply lead from the wall AC outlet,
and then plug in again after about one minute.
Turn the power to the component on.
Turn on the power to this unit.
Position the FM antenna as high and as far away
from nearby roads as possible. Connect using a
coaxial cable.
Check antenna connections.
Install a multi-element type FM antenna if possible.
Install an antenna appropriate for the electric field
strength of your area.
Reprogram memory presets.
Problem is difficult to eliminate but can be lessened
by grounding AM loop antenna.
Move away from TV or microprocessor.
Properly connect AM loop antenna.
Change orientation of AM loop antenna.
Install an external AM antenna.
GENERAL
TUNER