Ac Power Entry Module; Dc-Dc Power Converters; Cooling System; Processor Subsystem - Cisco 12404 Installation And Configuration Manual
Internet router
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Also See for 12404:
- Unpacking instructions manual (18 pages) ,
- Technical specifications (31 pages) ,
- Datasheet (9 pages)
Table of Contents
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Chapter 4
Troubleshooting the Installation
AC Power Entry Module
DC-DC Power Converters
Cooling System
Warning
Caution
Processor Subsystem
OL-11636-01
The Cisco 12404 Internet router can be configured for an AC power source. For
the troubleshooting procedures in this chapter, the Cisco 12404 router consists of
two AC power entry modules (PEMs).
A DC-DC power converter is installed on each card in the card cage. The
converter is under control of the MBus module, another component on each card.
The DC-DC converter takes –48 VDC and converts it into +2.5, +3.3 and +5 VDC
for use by the card circuitry.
Cooling subsystem is comprised of one fan tray assembly and one air filter. The
fan tray assembly and air filter are hot swappable, and can be replaced while the
system is running. The fan tray assembly should be operating whenever the
system power is on; except when the fan tray assembly is being removed and
replaced.
Replace the fan tray assembly within 2 minutes of removing it from the chassis
or the router will go into a critical failure mode and shutdown, due to an
overtemp condition.
Replace the fan tray assembly safely and quickly to maintain EMI compliance.
The processor subsystem includes the RP and all line cards. Each card has an
onboard processor. The RP downloads a copy of the Cisco IOS image to each line
card processor. A line card or RP that is partially installed in the backplane might
Cisco 12404 Internet Router Installation and Configuration Guide
Problem-Solving with Subsystems
4-15
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Table of Contents
Troubleshooting
