2N Omega Lite - Installation Manual v1.5 - Manual (Page 45)

2N
®
- OMEGA Lite
Installation manual
Installation manual
45
www.2n.cz
8. Minor servicing tasks
8.1. Replacement of lithium battery
The battery must be replaced if its voltage drops below 2.5 V. But we
recommend that the battery be replaced at least once every three years, even if its
voltage is correct. We recommend that the battery be replaced with the PBX switched
off. Before changing the battery, we recommend saving the program of the PBX and the
accounting data to a PC. After changing the battery, check the date, time and programme
of the PBX, and if this data is not correct, perform a correction of the setting. In this case
we recommend that this task be performed only when no one is using the telephone.
WARNING! Use only a tool made from insulating material for replacement!
WARNING!
Danger of explosion in case of incorrect battery replacement. It is only
possible to replace a battery using one of the same or equivalent type
according to the manufacturers recommendation. Always handle used batteries
according to the manufacturer’s instructions.
8.2. Setting music volume
On the motherboard there is a regulator for the volume of the external music source
(connector J25). This task can be performed with the PBX switched on. In view of the
miniature dimensions of the components, it is necessary to use a suitable tool (for
example, precision screwdriver) and the appropriately light force.