Removal And Replacement Procedures; Card Cage Access - Digital Equipment DECmpp 12000/Sx 100 Hardware Service Manual

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
6