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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, page 12 Removing the Fan Unit, page 14 Installing the Fan Unit, page 16 Replacing the Router Cover, page 17 Removing the Router Cover To access the Cisco 3825 fan unit, you must first r
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NMD- FastEthernet Ports ESW- 35x 18x Ext 36 Pwr GE1 -48V GE0 10/100/ 1000 Base-Tx EN 10/100/1000 Base-Tx 17x 0x 35x 17x 34x 16x 33x 15x 32x 14x 31x 13x 30x 12x 29x 11x 28x 10x 27x 9x 26x 8x 25x 17 24x 6x 23x 5x 22x 4x 21x 3x 20x 2x 19x 1x 18x 0x Upgrading the Cisco 3825 Fan Unit Step 5 Remove the three screws on each side panel and set them aside in a safe place. Step 6 Slide the cover toward the front of the chassis (about 1 inch [25 mm]), as shown in Figure 2. Figure 2 Removing the Cover
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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 on page 2. 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 Installing and Upgrading Fans in the Cisco
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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 Step 3 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 1 1 Fan mounting screws on the side of the chassis Installing and Upgrading Fans in the
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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 on page 2. Installin
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Upgrading the Cisco 3825 Fan Unit Step 1 Lower the fan unit down and onto the chassis floor. Step 2 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 Fan 1 2 Fan 1 to J4 connector 3 Fan 2 4 Fan 2 to J18 connector 5 Fan 3 6 Fan 3 to J25 connector Step 3 Attach fan 2 to the J18 connector on the motherboard. (See number 3 and 4 in Figure 7.) Step 4 Attach fan 3 to the J25 connector on the mother
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Obtaining Documentation, Obtaining Support, and Security Guidelines Step 1 Place the router on a flat surface, with the front panel facing you. Step 2 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
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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:
http://www.cisco.com/en/US/docs/routers/
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Safety Warnings and Guidelines Safety Warnings and Guidelines This section provides the safety warnings and guidelines for working with the Cisco 3825 series router. It contains the following sections: Safety Warnings, page 2 Safety Guidelines, page 9 Safety with Electricity, page 9 Preventing Electrostatic Discharge Damage, page 10 Safety Warnings Note Use this section in conjunction with the Cisco 2800 Series and Cisco 3800 Series Integrated Services Routers Regulatory Compliance
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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
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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 avve
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Safety Warnings and Guidelines Installing and Upgrading Fans in the Cisco 3825 Series Routers 78-18642-01 5
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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 acompanha
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Safety Warnings and Guidelines Installing and Upgrading Fans in the Cisco 3825 Series Routers 78-18642-01 7
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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 Do not work on the system or connect or disconnect cables during periods of lightning activity. Sta
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Safety Warnings and Guidelines 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 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
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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 hand
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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 Installing and Upgrading Fans in the Cisco 3825 Series Routers 78-18642-01 11 280474
