Tools And Parts Required To Replace The T640 Hardware Components; Table 50: Field-Replaceable Units; Table 51: Tools And Parts Required For Component Replacement - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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Tools and Parts Required to Replace the T640 Hardware Components

218
NOTE: Before you replace most host subsystem components, such as a
control board or Routing Engine, you must take the host subsystem offline.
However, it is not necessary to halt the host subsystem to insert or remove
a PC card.
You must power off the Routing Engine before replacing a CompactFlash
card or solid-state disk in a Routing Engine.
Table 50 on page 218 lists the FRUs for the router.

Table 50: Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs
Air filters
Flexible PIC Concentrators (FPCs)
Front and rear fan trays
Physical Interface Cards (PICs)
Power supplies
Backup SONET Clock Generators (SCGs)
Switch Interface Boards (SIBs)
Master control board (if nonstop active routing
is configured)
Backup control board
Backup Routing Engine
T640 Router Description on page 3
Taking the T640 Host Subsystem Offline on page 256
To replace hardware components, you need the tools and parts listed in
Table 51 on page 218.

Table 51: Tools and Parts Required for Component Replacement

Components
All
Hot-Pluggable FRUs
Connector Interface Panel (CIP)
Nonredundant control board
Master control board (if nonstop active routing
is not configured)
Nonredundant Routing Engine
Master Routing Engine (if nonstop active routing
is not configured)
Master and nonredundant SCGs
Tool or Part
Electrostatic discharge (ESD) grounding wrist
strap
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