5. Maintenance
MF0121ACP_uc.docx Manual for Node AM4 Page 63
5.2.5. Power Supply
Danger: Electrical hazard. Danger of death or fatal injury from electrical current
inside the unit in operation. Before opening the unit, disconnect mains power.
Caution: Rotating fans. Risk of injury in operation. Wear tight-fitting clothes and
disconnect mains before working inside the unit.
Note: We strongly recommend not to replace a defect PSU on-site but to send the
Node AM to CommScope for repair. A replacement on-site must only be done
by a service technician of CommScope or by an equally trained person who
has the necessary qualifications to carry out such a replacement as well as the
corresponding safety tests demanded by local, regional and country-specific
regulations.
Note: Replacing a PSU with another type (e.g. 680 W with 780 W type) is not possible
on site.
To remove the original power supply
(AC/DC and DC/DC types are available),
proceed as follows:
Remove RF and dummy cards as
described in the next chapter 5.2.6.
We strongly recommend, to remove the
combiner as well (see chapter 5.2.1).
Positions of the ten
hexagon socket head
cap screws of the power
supply.
Unscrew the ten hexagon
socket head cap screws of the
power supply (positions as
shown above).
Note:
Do not unscrew any Torx
screw.
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