User's Manual

Confidential & Proprietary 32/136
[INSTRUCTION]
The equipment and accessories including inner lithium battery are to be disposed of safely after
the life span of them and national regulation must be observed. Do not attempt to replace the
lithium battery unless service personnel confirmation has first been obtained, to avoid any risk
of explosion.
4) Main Power Supply Unit (MPSU)
MPSU receives -48V of input and outputs +6V and +9V of DC power.
On the front panel, this unit has an output test port and it also has DC ALM LED Indicator to
show whether output gets faulty.
Figure 4.6 – MPSU Outer Look
4.1.5 Front/rear panels of BIU
1) Front panel