6
Removal and Replacement Procedures
Chapter 6 describes how to remove and replace the following data parallel unit
(DPU) components:
•
Array control unit (ACU) Printed Circuit Board (PCB)
•
Front-end VME interface PCB (T6000)
•
Processor element (PE) array PCB
•
Router PCB
•
Power/status indicator PCB
•
Power tray
•
Fan tray
Appendix A provides a list of recommended spares for DECmpp 12000/Sx Series
Data Parallel Units.
6.1 Card Cage Access
The ACU, PE array, front-end VME interface, and router PCBs are accessed from
the rear of the DPU. Figure 6–1 shows the card cage access for a DECmpp 12000
DPU. Figure 6–2 shows the card cage access for a DECmpp 12000–LC DPU.
To open the DPU rear door, use the hex wrench supplied with the system.
Removal and Replacement Procedures 6–1
