Yamaha DSP-Z9 Owner's Manual page 112

TROUBLESHOOTING
Problem
Dolby Digital or DTS
sources cannot be
played. (The Dolby
Digital or DTS
indicator on the front
panel display does
not light up.)
A "humming" sound
can be heard.
The volume level is
low while playing a
record.
The volume level
cannot be increased,
or sound is distorted.
The sound effect
cannot be recorded.
A source cannot be
recorded by a digital
recording component
connected to this
unit's DIGITAL
OUTPUT jack.
A source cannot be
recorded by an
analog component
connected to this
unit's AUDIO OUT
jacks.
The sound field
parameters and some
other settings on this
unit cannot be
changed.
This unit does not
operate properly.
"CHECK SP WIRES"
appears on the front
panel display.
110
Cause
The connected component is not set to
output Dolby Digital or DTS digital
signals.
The input mode is set to Analog.
The cable connections are incorrect.
The turntable is not connected to the GND
terminal.
The record is being played on a turntable
with an MC cartridge.
The component connected to this unit's
OUT (REC) jacks is turned off.
It is not possible to record sound effects
with a recording component.
The source component is not connected to
this unit's DIGITAL INPUT jacks.
Some components cannot record the
Dolby Digital or DTS sources.
The source component is not connected to
this unit's analog AUDIO input jacks.
Memory Guard is set to Guard.
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.
The speaker cables have short-circuited.
Remedy
Make an appropriate setting following the operating
instructions for your component.
Change the input mode setting to Auto or DTS.
Firmly connect the audio plugs. If the problem
persists, the cables may be defective.
Connect the grounding cord of your turntable to this
unit's GND terminal.
The turntable should be connected to this unit through
an MC-head amplifier.
Turn on the power to the component.
Connect the source component to the DIGITAL
INPUT jacks.
Connect the source component to the analog AUDIO
input jacks.
Select Free to enable changes to the sound field
parameters.
Disconnect the AC power cord from the outlet and
then plug it in again after about 30 seconds.
Make sure all speaker cables are connected correctly.
Refer to
page
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44
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24
24
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17—25
17—25
78
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13