Sony PSP-1006 K - Manual (Page 129)

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Troubleshooting
There is no sound.
, Check that the volume is not set to zero. Try raising the volume
( pages 18, 22).
, Check that the mute setting is not on. Press the sound button on the system
front to clear the mute setting ( page 34).
, If headphones are inserted, the system will not produce any sound through
the speakers.
, See also "There is no sound or the sound quality from the headphones is
poor." ( page 133).
The volume does not turn up.
, Check that the AVLS feature is turned off. When turned on, the AVLS
feature limits the maximum volume of the headphones ( page 98).
Sound quality is poor.
, If the system is used in an area where there are vibrations, or if it is near
strong magnetic objects such as a television, the sound may be distorted and
there may be increased background noise. Try moving the system to a
different location.
The system does not recognize the UMD™.
, Check that the UMD™ is properly inserted (label is facing the system rear,
etc.). Try taking out the UMD™ and reinserting it.
, Check that the UMD™ recorded surface is clean. If not, wipe it gently with
a soft cloth ( page 14).
The UMD™ doesn't play properly.
, If moisture condensation occurs, remove the UMD™ from the system and
do not use the system for several hours until the condensation evaporates
(
page 13).
Sound
UMD™