26
27
Playback occurs without bass
› Connected loudspeaker poles are reversed (+ and – mixed up)
› The „BASS“ control on the amplifier has been set to minimum.
Playback occurs without treble
› The „TREBLE“ control on the amplifier has been set to minimum.
›
Any repairs other than those mentioned above are to be carried out solely by an authorized
technician. Never try to repair this device yourself!
Chapter 9
Troubleshooting
Chapter 10
Maintenance and cleaning
Carry out a technical safety inspection on a regular basis, e.g. check if the power cable or housing
may have become damaged.
If there is reason to believe that the device can no longer be operated safely, then disconnect it
immediately from the power supply and secure it against any unintentional operation. Carefully
remove the power cable plug from the wall outlet and where applicable switch off the corre-
sponding circuit breaker first.
It can be assumed that safe operation is no longer possible, if:
› there is visible damage to the device or power cable,
› the device no longer works,
› it has been stored for a longer period of time under unfavorable conditions
› or exposed to rigorous transport conditions.
Repairs are only to be carried out by qualified personnel, who are familiar with the hazards invol-
ved and the relevant regulations.
Transporting or sending the device
› Please retain the original box and the packaging material in case you need to transport or send
the device out for maintenance at a later date. Please note that the device should be repacked in
the original packaging. The box and packaging have been especially developed for this device
in order to protect it during transport and against damage.
› Retain this instruction manual for future reference and where required pass it along with the
device if handed over to a third party.
Keeping the external case clean
› Never use volatile fluids near the device, as for example insect spray. Avoid letting the device
come in contact with rubber or plastic products for longer periods of time. These could other-
wise leave marks behind.
Cleaning the device
› Unplug the power cable before cleaning. Always use a soft and dry cloth to clean the unit’s
exterior. If the device is extremely dirty you can use a soft cloth, dampened with water or a mild
cleaning solution to clean.
› Never use any abrasive or harsh cleaning agents (e.g. alcohol, benzine or thinners) as these
could damage the controls, casing or any markings and labels found on the device.
10
Maintenance and
cleaning