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54
SYMPTOM
The unit fails to turn on when
STANDBY/ON is pressed, or set in
the standby mode suddenly soon
after the power has been turned on.
The unit does not work normally.
No sound or no picture.
The sound suddenly goes off.
Only one side speaker outputs
sound.
A “humming” sound can be heard.
The volume level is low while
playing a record.
The volume level cannot be
increased, or the sound is distorted.
No sound from the effect speakers.
No sound from the rear speakers.
CAUSE
The power cord is not plugged in or the
plug is not completely inserted.
The IMPEDANCE SELECTOR switch
on the rear panel is not fully set at the
upper or lower end.
The internal microcomputer has been
frozen by an external electric shock
(lightning, excessive static electricity,
etc.) or by a power supply with low
voltage.
Incorrect output cord connections.
Appropriate program source has not
been selected.
SPEAKERS have not been set
properly.
The speaker connections are not
secure.
The protection circuit has been
activated because of a short circuit, etc.
The SLEEP timer has functioned.
Incorrect setting of BALANCE.
Incorrect cord connections.
Incorrect cord connections.
No connection from the turntable to the
GND terminal.
The record is being played on a
turntable with an MC cartridge.
The component connected to the REC
OUT terminals of this unit is in the
standby mode.
The sound effect is set off.
A Dolby Surround decoding program is
being used with material not encoded
with Dolby Surround.
The sound output level of the rear
speakers is set to minimum.
A monaural sound source is being
played in the DOLBY PRO LOGIC or
DOLBY PRO LOGIC ENHANCED
program.
REMEDY
Firmly plug in the power cord.
Slide the switch fully to the upper or
lower end.
Set the unit in the standby mode and
disconnect the AC power cord from the
AC outlet. After about 30 seconds have
passed, connect the power cord and
operate the unit again.
Connect the cords properly. If the
problem persists, the cords may be
defective.
Select an appropriate program source
by INPUT.
Set SPEAKERS corresponding to the
speakers in use to the ON position.
Secure the connections.
Set the unit in the standby mode and
then switch on again to reset the
protection circuit.
Cancel the SLEEP timer.
Adjust it to the appropriate position.
Connect the cords properly. If the
problem persists, the cords may be
defective.
Firmly connect the audio plugs. If the
problem persists, the cords may be
defective.
Make the GND connection between the
turntable and this unit.
The turntable should be connected to
the unit through the MC head amplifier.
Turn on the power to the component.
Press EFFECT to turn it on.
Use a different sound field program.
Raise the sound output level of the rear
speakers.
Select another sound field program
suitable for the monaural sound source.
Amplifier
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.
05HTR-5140-e/f-7 6/22/99, 2:05 PM54