Service/Maintenance and care
10.1 Service
CAUTION!
Potential risk of explosion.
The device incorporates a lithium battery which may cause danger
of explosion if not replaced correctly.
Refer replacement only to qualified service personnel authorized
by d&b audiotechnik.
Do not open the device. No user serviceable parts inside. In case
of any damage do not operate the device under any
circumstances.
Refer servicing only to qualified service personnel authorized by
d&b audiotechnik. In particular if:
▪ objects or liquids have entered the device.
▪ the device does not operate normally.
▪ the device was dropped or the housing is damaged.
10.2 Maintenance and care
During normal operation, the amplifier provides maintenance-free
service.
Due to the cooling concept, no dust filters are required. As a result,
filter exchange or cleaning the filters is not necessary.
10.2.1 Touchscreen cleaning
After a certain period of time, the touchscreen may require
cleaning.
For this purpose, proceed as follows:
▪ Use a soft cloth only.
▪ Do not use any solvent cleaners.
To remove very heavy dirt from the panel, it may be helpful to use
a special cleaning spray for TFT screens. In this case, proceed as
follows:
1. Spray on the soft cloth before wiping the screen.
↳
Never apply/spray directly on the screen as the liquid
could penetrate the device.
2. Wipe the screen with moderate pressure.
10 Service/Maintenance and care
d&b D40 Reference manual 1.5 en 65
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