Yamaha YHT-S401 Mode D'emploi page 30

Troubleshooting
Problem
The volume level
decreases without any
operation.
Sound is poor (noisy).
This unit does not
operate properly.
A digital or high-
frequency equipment
produces noises.
The unit settings
change automatically.
The remote control
does not operate the
unit.
The TV remote control
does not work even
when the remote signal
receptor is attached to
the top of the speaker.
■ HDMI
Problem
"AUTO" set in the
option menu "2.AUDIO
DELAY" does not
operate.
The HDMI control
function does not
operate properly.
No picture or sound
26
En
Cause
The volume level is automatically set to
70 the next time you turn on the unit to
protect the speakers.
A speaker cable may be shorted.
This unit may receive a strong electrical
shock, such as from a lightening bolt or
excessive static electricity, or drop in
power supply.
The unit may be placed close to digital
equipment or high-frequency equipment.
When "3-1:CONTROL" in the setup
menu "3:HDMI SETUP" is set to "ON",
operations of the TV (for example,
changing channels, etc.) may change the
unit settings, such as the surround mode.
The unit may be outside the remote
control operation range.
The remote control sensor of this unit
may be exposed to direct sunlight or
lighting.
The batteries may be worn out.
The position of TV remote signal
receptor is not appropriate.
The TV remote signal receptor is facing
an incompatible sensor, such as a sensor
for detecting the brightness of the room.
Cause
The TV does not support automatically
adjusting the audio delay.
The number of the connected HDMI
components is over the limit.
Add the connection of HDMI
components
The connected HDMI component does
not support high-bandwidth digital
copyright protection (HDCP).
Solution
Make sure all cables are connected properly.
Set this unit to standby mode, and then
disconnect the power cable. Wait for about 30
seconds, connect the power cable, and then turn
on this unit.
Place this unit farther away from such
equipment.
Set "3-1:CONTROL" in the setup menu
"3:HDMI SETUP" to "OFF" or set the unit
again by using its remote control.
For information on the remote control operation
range, refer to "Remote control preparation".
Change the lighting.
Replace the batteries.
Move the TV remote signal receptor to right/left
so as to place its center to the front of TV
remote control sensor.
Place the TV remote signal receptor
approximately 10 mm away from TV.
Place the TV remote signal receptor after
confirming the position of remote control sensor
by referring to the manual of your TV.
Solution
Adjust the delay time manually (0 to 500 ms).
Disconnect some of the HDMI components.
Set "3-1:CONTROL" in the "3:HDMI SETUP"
to "ON" again.
Connect the HDMI component that supports
HDCP.
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