Yamaha ysp-900 Owner's Manual page 85

Problem
Distorted or too little bass sound.
Too much bass sound.
Surround sound effects are
insubstantial.
Dolby Digital or DTS sources
cannot be played. (Dolby Digital or
DTS indicator does not light up in
the front panel display.)
There is noise interference when a
subwoofer is not connected to this
unit.
Low frequency sounds are
distorted.
On-screen display does not
appear.
This unit does not operate
properly.
There is noise interference from
digital or high-frequency
equipment.
This unit does not output effect
sounds properly.
My beam auto-adjust function
does not work.
Cause
CROSS OVER in SUBWOOFER SET is
set incorrectly.
One of the night listening modes is
currently selected.
TruBass is currently turned on.
The volume level of the subwoofer is too
high.
The listening room is not a regular shape.
There is no wall in the path of the sound
beam.
The connected component is not set to
output Dolby Digital or DTS digital
signals.
The input mode is set to ANALOG.
The protection circuitry was in operation
because a source with strong bass
elements was played back.
CROSS OVER in SUBWOOFER SET is
set incorrectly.
The OSD video pin cable is not
connected properly.
The internal microcomputer has been
frozen by an external electric shock
(such as lightning or excessive static
electricity) or by a power supply with
low voltage.
This unit is too close to the digital or
high-frequency equipment.
The original source includes surround
effects.
The listening room is too noisy.
The sound reflectivity of the listening
room is too much.
The remote control may be operated
outside of the remote control operation
range.
TROUBLESHOOTING
Remedy
Set CROSS OVER correctly.
Turn off the night listening modes.
Turn off TruBass.
Turn down the volume level of the
subwoofer.
Install this unit in a square or rectangular
shaped room.
Try placing a flat object, such as a board,
in the path of the sound beam.
Make an appropriate setting following
the operating instructions for your
component.
Set the input mode to AUTO.
Turn down the volume level.
Select SWFR for BASS OUT.
Connect a subwoofer and adjust settings
for SUBWOOFER SET.
Set CROSS OVER correctly.
Connect the cable properly.
Disconnect the AC power supply cable
from the outlet and then plug it in again
after about 30 seconds.
Move this unit further away from such
equipment.
Disable surround effect settings on this
unit.
Keep the listening room as quiet as
possible.
Try manual adjustment.
Set REFLECTING to HI ECHO.
The remote control will function within a
maximum range of 6 m and no more than
30 degrees off-axis from the front panel.
See
page
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En