© NEC Corporation 2019 79
Caution!
Risk of damaging the Hub board.
When reinstalling the Hub board, do not bent the two Power-
good-connectors.
With bent connectors, the whole module cannot work properly.
Change the Receiving Cards
For servicing the Receiving cards, you first need to remove the Pixel cards (see 9.5.1) and the
Hub board (see 9.5.2).
Pull the Receiving cards straight off the
Hub board to not to damage their
connectors.
Replace the Receiving card.
To replace the Receiving card, follow the
instructions in reverse order.
Figure 119: Replacing the Receiving
Card
Change the Power Supply System
For servicing the power supply, you first need to remove the Pixel cards (see 9.5.1) and the
Hub board (see 9.5.2). Now the power supply in the cabinet is accessible.
The following components contribute to the power supply of a module:
2 Power supply units (PSU) (A)
1 Power distribution unit (PDU) (B1) with PDU shielding (B2)
2 Power supply interfaces to Hub board (C)
Figure 120: Behind Hub Board – Redundant Power Supply and PDU with PDU Shielding
B
B2
B1
A
C
