Installing Field-Replaceable Units in Cisco 3745 Routers Product Numbers: CISCO3745-CHAS+MP=, CISCO3745-MB=, CISCO3745-2FE-I/O=, PWR-3745-AC=, PWR-3745-DC=, PWR-3745-DC-U=, CISCO3745 FanASSY= This document describes how to install field-replaceable units (FRUs) in a Cisco 3745 router. This document is intended for the power supply installer, who should be familiar with electronic circuitry and wiring practices and have experience as an electronic or electromechanical technician.
Safety Recommendations and Warnings Before performing procedures described in this document, review the next section, “Safety Recommendations and Warnings.” Safety Recommendations and Warnings General 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 fan tray in a safe place. • Keep tools away from walk areas where you or others could fall over them.
Safety Recommendations and Warnings Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device. Warning The ISDN connection is regarded as a source of voltage that should be inaccessible to user contact.
Preventing Electrostatic Discharge Damage • Disconnect all power before doing the following: – Working on or near power supplies – Installing or removing a router chassis or network processor module – Performing most hardware upgrades • 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.
Notes, Cautions, and Warnings Notes, Cautions, and Warnings Notes, cautions, and warnings use the following conventions and symbols. Note Caution Warning Means reader take note. Notes contain helpful suggestions or references to additional information and material. Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data. IMPORTANT SAFETY INSTRUCTIONS This warning symbol means danger.
Notes, Cautions, and Warnings Varoitus TÄRKEITÄ TURVALLISUUTEEN LIITTYVIÄ OHJEITA Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä asiakirjassa esitettyjen varoitusten käännökset löydät laitteen mukana toimitetuista ohjeista.
Notes, Cautions, and Warnings 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. Per le traduzioni delle avvertenze riportate in questo documento, vedere le avvertenze di sicurezza che accompagnano questo dispositivo.
Notes, Cautions, and Warnings Varning! VIKTIGA SÄKERHETSANVISNINGAR 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. Se översättningarna av de varningsmeddelanden som finns i denna publikation, och se de översatta säkerhetsvarningarna som medföljer denna anordning.
FCC Class A Compliance FCC Class A Compliance The equipment described in this document generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class A digital device in accordance with the specifications in part 15 of the FCC rules.
Replacing Cisco 3745 Chassis Power Supplies Replacing Cisco 3745 Chassis Power Supplies The Cisco 3745 router can accommodate two AC or two DC power supplies to supply power to the chassis. Each unit provides up to 230 watts of power, and a single installed power supply meets the router’s requirements under most operating conditions. The second power supply provides redundancy, load sharing, and increased system availability. It can be removed without affecting system operation.
Replacing Cisco 3745 Chassis Power Supplies Cisco 3745 Chassis Power Supply for AC Input 62788 Figure 1 Front view of AC power supply Rear view of AC power supply Cisco 3745 Power Supply for DC Input 62992 Figure 2 Front view of DC power supply Rear view of DC power supply Installing Field-Replaceable Units in Cisco 3745 Routers 78-14308-02 11
Replacing Cisco 3745 Chassis Power Supplies Cisco 3745 Chassis Power Supply Connections AC power supply switch and receptacle Figure 4 DC power supply switch and wire terminals 72078 Figure 3 Chassis Power Supply Locations in the Cisco 3745 Router 72060 Power supplies Installing Field-Replaceable Units in Cisco 3745 Routers 12 78-14308-02
Replacing Cisco 3745 Chassis Power Supplies Removing a Cisco 3745 Chassis Power Supply To remove a chassis power supply, perform the following steps: Step 1 Warning Step 2 Warning Step 3 Step 4 Turn off power to the power supply to be removed. Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network voltages.
Replacing Cisco 3745 Chassis Power Supplies Loosening the Fan Tray Retaining Screws 72114 Figure 6 Step 6 Open the fan tray to the straight-out position, lift the fan tray off its hinges, and set it aside. (See number 1 and number 2 in Figure 7.
Replacing Cisco 3745 Chassis Power Supplies Step 7 If you are removing an AC power supply and your router has –48V telephony power modules installed, remove the –48V telephony power module next to the power supply you are removing, as described in Steps a and b. If there are no –48V telephony power modules installed, proceed to Step 8. a. Loosen the captive screw that secures the –48V telephony power module in the chassis. (See Figure 8.
Replacing Cisco 3745 Chassis Power Supplies Step 8 Loosen the power supply retention screw. (See Figure 10.) Loosening the Power Supply Retention Screw 72061 Figure 10 Step 9 Pull the power supply straight out of the router chassis. (See Figure 11.
Replacing Cisco 3745 Chassis Power Supplies Installing a Cisco 3745 Chassis Power Supply To install a chassis power supply, perform the following steps: Step 1 Carefully slide the power supply straight into the router chassis. (See Figure 11 for reference.) Step 2 Tighten the power supply retention screw at the front of the chassis. (See Figure 10 for reference.
Replacing Cisco 3745 Chassis Power Supplies Step 5 Tighten the two captive screws located inside the access door. (See Figure 6 for reference.) Step 6 Place the router so the rear panel is facing toward you. Step 7 Install the two retaining screws at the rear of the chassis. (See Figure 5 for reference.) Step 8 If you are installing a PWR-3745-DC-U= universal DC power supply, apply the input voltage label (supplied) over the existing input voltage label on the rear of the chassis.
Replacing Cisco 3745 Chassis Power Supplies Wire and Terminal Requirements Earlier model power supplies, PWR-3745-DC=, require copper wire, size AWG 14 to 16 (2.0 to 1.2 mm2), for the positive and negative connections and AWG 14 (2.0 mm2) minimum for the ground connection. Use a spade lug, Molex part number 19099-0017 or equivalent, for these connections. Later model power supplies, PWR-3745-DC-U=, require copper wire, size AWG 12 to 14 (3.0 to 2.
Replacing Cisco 3745 Chassis Power Supplies Figure 13 Wire Connections for DC Input Negative Positive 72079 Ground Step 5 Install the plastic cover over the terminals. Warning The safety cover is an integral part of the product. Do not operate the unit without the safety cover installed. Operating the unit without the cover in place will invalidate the safety approvals and pose a risk of fire and electrical hazards.
Replacing the Cisco 3745 Router Mainboard Tray Replacing the Cisco 3745 Router Mainboard Tray Removing the Mainboard Tray To remove the mainboard tray, perform the following steps: Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the equipment end of the wrist strap to the metal backplate of the chassis, avoiding contact with the connectors. Step 2 Turn off the power and unplug the power cord.
Replacing the Cisco 3745 Router I/O Board Caution Step 8 The mainboard is an ESD-sensitive component. To avoid damage, observe all ESD precautions. When you are ready to install the mainboard tray, see the “Installing the Mainboard Tray” section that follows. Installing the Mainboard Tray To replace the mainboard, perform the following steps: Step 1 Place the chassis so that the empty mainboard slot faces you.
Replacing the Cisco 3745 Router I/O Board Figure 15 Loosening the I/O Board Captive Screws 2 1 AL LP CD CTRLR E1 SEE MANU AL BEFORE INSTA LLATI ON AL VWIC 2MFT-E1 NM-HDV LP CTRLR CD E2 CTRLR NM-HDV BANK VWIC 4 BAN 2MFTE1 K 3 BAN K 2 BAN K 1 BAN K0 E1 SEE MANU AL BEFORE INSTA LLATI ON AL LP CTRLR CD E2 CTRLR E1 SEE MANUA L BEFOR E INSTAL LATION NM-HDV V0 EN BANK VWIC 4 BAN 2MFTE1 K 3 BAN K 2 BAN K 1 BAN K0 AL LP CTRLR CD E2 CTRLR E1 SEE MANUA L BEFOR E INSTAL LATION NM-HDV BANK VW
Replacing the Cisco 3745 Fan Assembly and Bezel Figure 17 Removing the I/O board AL LP CD CTRLR E1 SEE MANU AL BEFORE INSTA LLATION AL VWIC 2MFT-E1 NM-HDV LP CTRLR E2 CD CTRLR E1 NM-HDV BANK VWIC 4 BAN 2MFT-E1 K 3 BAN K 2 BAN K 1 BAN K0 SEE MANU AL BEFORE INSTA LLATION AL LP CTRLR CTRLR E1 SEE MANU AL BEFORE INSTA LLATION CTRLR E1 SEE MANU AL BEFORE INSTA LLATION CD E2 NM-HDV V0 EN BANK VWIC 4 BAN 2MFT-E1 K 3 BAN K 2 BAN K 1 BAN K0 AL LP CTRLR CD E2 NM-HDV BANK VWIC 4 BAN 2MFT-E1 K 3
Replacing the Cisco 3745 Spare Chassis and Midplane Fan Assembly and Bezel from a Cisco 3745 Router 72115 Figure 18 Removing the Fan Assembly and Bezel To replace the Cisco 3745 fan assembly and bezel, perform the following steps: Step 1 Place the router so that the front panel is closest to you. Loosen the two captive screws located inside the access door. (See Figure 6.) Step 2 Open the fan tray to the straight-out position and lift the fan tray off its hinges.
Replacing Connections to the Router • Replacing the Cisco 3745 Router I/O Board, page 22 • Replacing the Cisco 3745 Fan Assembly and Bezel, page 24 Replacing Connections to the Router To make final connections to the router, perform the following steps. Warning Read the installation instructions before you connect the system to its power source.
Troubleshooting Troubleshooting Check the following items to help isolate problems with the power supply installation: • With the power switch on, is the corresponding system power supply LED on the front panel on? See Figure 19 for LED status indicators. – If not, check the AC or DC input, AC or DC source, router circuit breaker, and the power supply cable (AC) or power supply wiring (DC). – If the power LED is still off, the problem might be a power supply failure.
Obtaining Documentation Obtaining Documentation Cisco provides several ways to obtain documentation, technical assistance, and other technical resources. These sections explain how to obtain technical information from Cisco Systems. Cisco.com You can access the most current Cisco documentation on the World Wide Web at this URL: http://www.cisco.com/univercd/home/home.htm You can access the Cisco website at this URL: http://www.cisco.
Obtaining Technical Assistance Documentation Feedback You can submit comments electronically on Cisco.com. On the Cisco Documentation home page, click Feedback at the top of the page. You can e-mail your comments to bug-doc@cisco.com. You can submit your comments by mail by using the response card behind the front cover of your document or by writing to the following address: Cisco Systems Attn: Customer Document Ordering 170 West Tasman Drive San Jose, CA 95134-9883 We appreciate your comments.
Obtaining Technical Assistance • Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue. • Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available. • Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.
Obtaining Additional Publications and Information Obtaining Additional Publications and Information Information about Cisco products, technologies, and network solutions is available from various online and printed sources. • The Cisco Product Catalog describes the networking products offered by Cisco Systems as well as ordering and customer support services. Access the Cisco Product Catalog at this URL: http://www.cisco.com/en/US/products/products_catalog_links_launch.
Obtaining Additional Publications and Information This document is to be used in conjunction with your router’s software configuration guide, the Regulatory Compliance and Safety Information document for your router, and the Cisco IOS configuration guides and command references for your Cisco IOS release.
