d&b audiotechnik D6, Руководство по оборудованию

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1.3. Maintenance/Service
Do not open the unit. No user serviceable parts inside. In case of any
damage do not operate the unit under any circumstances.
Refer servicing only to qualified service personnel authorized by
d&b audiotechnik. In particular if:
- objects or liquids have entered the unit.
- the unit is not operating normally.
- the unit was dropped or the housing is damaged.
CAUTION!
Potential risk of explosion.
The unit 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.
- Only replace with the same type of battery.
D6 Amplifier, Hardware manual (1.9 EN) Page 5 of 24