Cisco Systems Network Router 3825 Series User Manual

Installing and Upgrading Fans in the Cisco 3825  
Series Routers  
This document describes how to install or upgrade fans inside your Cisco 3825 series router.  
This document is intended for the fan installer who is familiar with electronic circuitry and wiring  
practices and has experience as an electronic or electromechanical technician.  
Note  
Use this document in conjunction with the following documents:  
Cisco 3800 Series Hardware Installation guide:  
Cisco 2800 Series and Cisco 3800 Series Integrated Services Routers Regulatory Compliance and  
Safety Information document:  
If you have questions or need help, see the “Obtaining Documentation, Obtaining Support, and Security  
This document contains the following sections:  
Americas Headquarters:  
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA  
© 2008 Cisco Systems, Inc. All rights reserved.  
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Safety Warnings and Guidelines  
Statement 1071—Warning Definition  
Warning  
IMPORTANT SAFETY INSTRUCTIONS  
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you  
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar  
with standard practices for preventing accidents. Use the statement number provided at the end of  
each warning to locate its translation in the translated safety warnings that accompanied this  
device. Statement 1071  
SAVE THESE INSTRUCTIONS  
Waarschuwing  
BELANGRIJKE VEILIGHEIDSINSTRUCTIES  
Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan  
veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij  
elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard  
praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de  
waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt  
raadplegen.  
BEWAAR DEZE INSTRUCTIES  
Varoitus  
TÄRKEITÄ TURVALLISUUSOHJEITA  
Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin  
käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu  
onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen  
mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien  
lausuntonumeroiden avulla.  
SÄILYTÄ NÄMÄ OHJEET  
Attention  
IMPORTANTES INFORMATIONS DE SÉCURITÉ  
Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant  
entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez  
conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures  
couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des  
avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil,  
référez-vous au numéro de l'instruction situé à la fin de chaque avertissement.  
CONSERVEZ CES INFORMATIONS  
WICHTIGE SICHERHEITSHINWEISE  
Warnung  
Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen  
kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und  
den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder  
Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten  
Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden.  
BEWAHREN SIE DIESE HINWEISE GUT AUF.  
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Safety Warnings and Guidelines  
Avvertenza  
IMPORTANTI ISTRUZIONI SULLA SICUREZZA  
Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle  
persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli  
relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti.  
Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le  
traduzioni delle avvertenze riportate in questo documento.  
CONSERVARE QUESTE ISTRUZIONI  
Advarsel  
VIKTIGE SIKKERHETSINSTRUKSJONER  
Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du  
begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med  
elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten  
av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne  
enheten.  
TA VARE PÅ DISSE INSTRUKSJONENE  
Aviso  
INSTRUÇÕES IMPORTANTES DE SEGURANÇA  
Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de  
lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos  
perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de  
prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para  
localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo.  
GUARDE ESTAS INSTRUÇÕES  
¡Advertencia!  
INSTRUCCIONES IMPORTANTES DE SEGURIDAD  
Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular  
cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los  
procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el  
número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña  
a este dispositivo.  
GUARDE ESTAS INSTRUCCIONES  
VIKTIGA SÄKERHETSANVISNINGAR  
Varning!  
Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada.  
Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och  
känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av  
varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna  
anordning.  
SPARA DESSA ANVISNINGAR  
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Safety Warnings and Guidelines  
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Safety Warnings and Guidelines  
Aviso  
INSTRUÇÕES IMPORTANTES DE SEGURANÇA  
Este símbolo de aviso significa perigo. Você se encontra em uma situação em que há risco de lesões  
corporais. Antes de trabalhar com qualquer equipamento, esteja ciente dos riscos que envolvem os  
circuitos elétricos e familiarize-se com as práticas padrão de prevenção de acidentes. Use o  
número da declaração fornecido ao final de cada aviso para localizar sua tradução nos avisos de  
segurança traduzidos que acompanham o dispositivo.  
GUARDE ESTAS INSTRUÇÕES  
Advarsel  
VIGTIGE SIKKERHEDSANVISNINGER  
Dette advarselssymbol betyder fare. Du befinder dig i en situation med risiko for  
legemesbeskadigelse. Før du begynder arbejde på udstyr, skal du være opmærksom på de  
involverede risici, der er ved elektriske kredsløb, og du skal sætte dig ind i standardprocedurer til  
undgåelse af ulykker. Brug erklæringsnummeret efter hver advarsel for at finde oversættelsen i de  
oversatte advarsler, der fulgte med denne enhed.  
GEM DISSE ANVISNINGER  
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Safety Warnings and Guidelines  
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Safety Warnings and Guidelines  
Warning  
Do not touch the power supply when the power cord is connected. For systems with a power switch,  
line voltages are present within the power supply even when the power switch is off and the power  
cord is connected. For systems without a power switch, line voltages are present within the power  
supply when the power cord is connected. Statement 4  
Warning  
Warning  
Warning  
Do not work on the system or connect or disconnect cables during periods of lightning activity.  
Statement 1001  
Before opening the chassis, disconnect the telephone-network cables to avoid contact with  
telephone-network voltages. Statement 1041  
Network hazardous voltages are present in the BRI cable. If you detach the BRI cable, detach the end  
away from the router first to avoid possible electric shock. Network hazardous voltages also are  
present on the system card in the area of the BRI port (RJ-45 connector), regardless of when power is  
turned off. Statement 44  
Warning  
Warning  
Before working on a chassis or working near power supplies, unplug the power cord on AC units;  
disconnect the power at the circuit breaker on DC units. Statement 12  
When installing the unit, always make the ground connection first and disconnect it last. Statement 42  
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Safety Warnings and Guidelines  
Warning  
Warning  
Before working on equipment that is connected to power lines, remove jewelry (including rings,  
necklaces, and watches). Metal objects will heat up when connected to power and ground and can  
cause serious burns or weld the metal object to the terminals. Statement 43  
Do not touch the power supply when the power cord is connected. For systems with a power switch,  
line voltages are present within the power supply even when the power switch is off and the power  
cord is connected. For systems without a power switch, line voltages are present within the power  
supply when the power cord is connected. Statement 4  
Warning  
Before performing any of the following procedures, ensure that power is removed from the DC circuit.  
Statement 1003  
Safety Guidelines  
Follow these guidelines to ensure general safety:  
Keep the chassis area clear and dust-free during and after installation.  
Place the removed chassis cover in a safe place.  
Keep tools away from walk areas where you or others could fall over them.  
Do not wear loose clothing that may get caught in the chassis. Fasten your tie or scarf and roll up  
your sleeves.  
Wear safety glasses when working under conditions that may be hazardous to your eyes.  
Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.  
Safety with Electricity  
Warning  
Before working on equipment that is connected to power lines, remove jewelry (including rings,  
necklaces, and watches). Metal objects will heat up when connected to power and ground and can  
cause serious burns or weld the metal object to the terminals. Statement 43  
Follow these guidelines when working on equipment powered by electricity:  
Locate the room’s emergency power-off switch. Then, if an electrical accident occurs, you can  
quickly shut the power off.  
Before working on the system, turn off the power and unplug the power cord.  
Disconnect all power.  
Do not work alone if potentially hazardous conditions exist.  
Look carefully for possible hazards in your work area, such as moist floors, ungrounded power  
extension cables, and missing safety grounds.  
Never assume that power is disconnected from a circuit. Always check.  
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Items in the Fan Replacement Kit  
If an electrical accident occurs, proceed as follows:  
Use caution, and do not become a victim yourself.  
Turn off power to the system.  
If possible, send another person to get medical aid. Otherwise, determine the condition of the  
victim and then call for help.  
Preventing Electrostatic Discharge Damage  
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when  
electronic printed circuit cards are improperly handled and can result in complete or intermittent  
failures. Always follow ESD-prevention procedures when removing and replacing cards. Ensure that the  
router chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring  
that it makes good skin contact. Connect the clip to an unpainted surface of the chassis frame to safely  
channel unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist  
strap and cord must operate effectively. If no wrist strap is available, ground yourself by touching the  
metal part of the chassis.  
Caution  
For safety, periodically check the resistance value of the antistatic strap, which should be between 1 and  
10 megohms (Mohms).  
Items in the Fan Replacement Kit  
The fan replacement kit contains the following items:  
Fan unit (three fans connected together as one unit)  
Additional replacement screws (a few extra screws are provided in case you misplace the original  
screws)  
Installing and Upgrading Fans in the Cisco 2821 Series Routers document (this document)  
Required Tools and Equipment  
Installation might require some tools and equipment that are not provided as standard equipment with  
the router. The following tools and parts are required for a typical router installation:  
Number 2 Phillips screwdriver  
ESD-preventive wrist strap  
Antistatic mat  
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Location of the Cisco 3825 Router Fans  
Location of the Cisco 3825 Router Fans  
Figure 1 shows the location of the fan unit in the Cisco 3825 router. The Cisco 3825 routers contain three  
fans, which are connected together as one unit.  
Figure 1  
Fan Unit Location in the Cisco 3825 Router  
1
1
Location of the fan unit  
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Upgrading the Cisco 3825 Fan Unit  
Upgrading the Cisco 3825 Fan Unit  
The fan unit and cabling for the Cisco 3825 router are contained inside the chassis.  
Note  
The fan unit upgrade procedure will take approximately one hour.  
To upgrade the fan unit, complete these procedures:  
Removing the Router Cover  
To access the Cisco 3825 fan unit, you must first remove the router cover. To remove the router cover,  
complete the steps that follow. You will need a number 2 Phillips screwdriver.  
If your router uses AC or DC power, observe the following warning:  
Warning  
Do not touch the power supply when the power cord is connected. For systems with a power switch,  
line voltages are present within the power supply even when the power switch is off and the power  
cord is connected. For systems without a power switch, line voltages are present within the power  
supply when the power cord is connected. Statement 4  
If your router uses DC power, observe the following warning:  
Warning  
Caution  
Before performing any of the following procedures, ensure that power is removed from the DC circuit.  
Statement 1003  
Before removing the cover, make sure that the flash memory card ejector button is flush with the front  
panel. If the button projects from the panel, removing the cover can damage it.  
Step 1  
Power down the router and disconnect the power cord from the front of the router.  
Warning  
Before opening the unit, disconnect the telephone-network cables to avoid contact with  
telephone-network voltages. Statement 1041  
Step 2  
Step 3  
Disconnect all network interface cables from the back panel of the router.  
Remove the router from the rack. Remove the rack-mounting brackets from the router, using the number  
2 Phillips screwdriver.  
Step 4  
Place the router on a flat surface. Remove the two screws from the top of the router and set them aside  
in a safe place.  
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Upgrading the Cisco 3825 Fan Unit  
Step 5  
Step 6  
Remove the three screws on each side panel and set them aside in a safe place.  
Slide the cover toward the front of the chassis (about 1 inch [25 mm]), as shown in Figure 2.  
Figure 2  
Removing the Cover from a Cisco 3825 Router  
2
1
NM  
D-  
E
SW  
-
36  
35  
x
G
E
1
FastEthernet Ports  
10  
/10  
0/10  
00  
B
ase-Tx  
17x  
35  
x
17  
x
34  
x
16  
x
33  
x
15  
x
32  
x
14  
x
31  
x
13  
x
30  
x
12  
x
18x  
29  
x
11  
x
28  
x
10  
x
27  
x
Ext  
Pwr  
9x  
26  
x
8x  
25  
x
-48V  
17  
24  
x
G
E
10  
/10  
1000  
B
ase-T  
0
0/  
6x  
23  
x
5x  
22  
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4x  
21  
x
3x  
x
20  
x
0
x
2x  
EN  
19  
x
1x  
18  
x
0x  
1
Slide cover toward front  
2
Remove cover from router chassis  
Step 7  
Step 8  
Lift the cover away from the router chassis, as shown in Figure 2.  
Set the cover aside.  
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Upgrading the Cisco 3825 Fan Unit  
Removing the Fan Unit  
After you remove the router cover, follow these steps to remove the fan unit.  
Note  
Before you begin, read the safety warnings as described in the “Safety Warnings and Guidelines” section  
Step 1  
Locate the three fan connectors on the motherboard and remove them by lifting the connector away from  
the receptacle, as shown in Figure 3.  
Figure 3  
Lifting the Connector from the Receptacle  
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Upgrading the Cisco 3825 Fan Unit  
Step 2  
Remove the two screws that hold the top of the fan unit to the router. (See Figure 4.)  
Figure 4  
Removing Screws Holding the Top of the Fan Unit  
1
1
Screws holding the top of the fan unit to the router  
Remove the four screws that hold the fan unit to the side of the chassis. (See Figure 5.)  
Figure 5 Removing Fan Mounting Screws from the Side of the Chassis  
Step 3  
1
1
Fan mounting screws on the side of the  
chassis  
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Upgrading the Cisco 3825 Fan Unit  
Step 4  
Remove the two screws that hold the fan unit to the front of the chassis. (See Figure 6.)  
Figure 6  
Removing Fan Mounting Screws from the Front of the Chassis  
1
1
Fan mounting screws on the front of the  
chassis  
Step 5  
Lift the fan unit out of the chassis.  
Installing the Fan Unit  
Follow these steps to install the fan unit.  
Note  
Before you begin, read the safety warnings as described in the “Safety Warnings and Guidelines” section  
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Upgrading the Cisco 3825 Fan Unit  
Step 1  
Step 2  
Lower the fan unit down and onto the chassis floor.  
Attach fan 1 to the J4 connector on the motherboard. (See number 1 and 2 in Figure 7.)  
Figure 7  
Attaching Fan Cable to the J Connectors  
1
2
3
4
5
6
1
3
5
Fan 1  
Fan 2  
Fan 3  
2
4
6
Fan 1 to J4 connector  
Fan 2 to J18 connector  
Fan 3 to J25 connector  
Step 3  
Step 4  
Attach fan 2 to the J18 connector on the motherboard. (See number 3 and 4 in Figure 7.)  
Attach fan 3 to the J25 connector on the motherboard. (See number 5 and 6 in Figure 7.)  
Caution  
The connectors are polarized/keyed to allow easy insertion in one orientation only. Orient the fan  
connectors correctly before you insert them. Incorrect orientation can damage the connector pins.  
Step 5  
Step 6  
Step 7  
Reinstall the two screws on the front of the chassis. (See Figure 6 on page 16.)  
Reinstall the four screws on the side of the chassis. (See Figure 5 on page 15.)  
Reinstall the two screws on the top of the fan unit. (See Figure 4 on page 15.)  
Replacing the Router Cover  
Follow these steps to replace the cover.  
Note  
Before you begin, read the safety warnings as described in the “Safety Warnings and Guidelines” section  
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Obtaining Documentation, Obtaining Support, and Security Guidelines  
Step 1  
Step 2  
Place the router on a flat surface, with the front panel facing you.  
Place the cover on the base, with about 1 inch (25 mm) of clearance between the cover and the back  
panel.  
Step 3  
Slide the cover back onto the base, making sure that the hook at the back edge of the cover, near the left  
side, fits underneath the card cage on the back panel of the router.  
Caution  
When replacing the cover, do not pinch the wires.  
Step 4  
Step 5  
Step 6  
Reinstall the rack-mounting brackets, and then reinstall the router in the rack.  
Reconnect power and network interface cables.  
Power up the router, and verify that the alarms and warnings disappear.  
Obtaining Documentation, Obtaining Support, and Security  
Guidelines  
For information on obtaining documentation, obtaining support, providing documentation feedback,  
security guidelines, and also recommended aliases and general Cisco documents, see the monthly  
What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical  
documentation, at:  
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© 2008 Cisco Systems, Inc. All rights reserved.  
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