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Cisco Product Number: BOOT-1700=
This document describes how to install or upgrade the Boot ROM in your Cisco 1720 router. Table 1 describes the Cisco parts to which this document applies.
| Cisco Part Number | Description |
|---|---|
BOOT-1700= | Boot ROM chip for Cisco 1720 routers |
This document contains the following sections:
This section describes the tools required to install the Boot ROM and important safety information. Read this section before upgrading the Boot ROM in the Cisco 1720 router.
The following items are required to upgrade the router boot ROM:
 | Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. |
| Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. |
| Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
| 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. |
| Warning Read the installation instructions before you connect the system to its power source. |
| Warning Ultimate disposal of this product should be handled according to all national laws and regulations. |
| 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. |
| Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
| Warning Hazardous network voltages are present in WAN ports regardless of whether power to the router is OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach the end away from the router first. |
Before installing a boot ROM, read the electrostatic discharge (ESD) instructions in this section to prevent damage to the equipment. ESD is a discharge of stored static electricity that can damage equipment and impair electrical circuitry. It occurs when electronic components are improperly handled and can result in complete or intermittent failures.
Following are guidelines for preventing ESD damage:
 | Caution To avoid damaging the equipment, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megohms (Mohms). |
| Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the router. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. |
In order to upgrade Cisco 1720 router Boot ROM, you must open the router chassis. Opening the chassis requires a number one Phillips screwdriver.
Follow these steps to open the chassis:
Step 1 Make sure the router is turned off and is disconnected from the power supply.
Step 2 Remove any installed WAN interface card from the WIC Ø slot.
Step 3 Turn the router upside down, and rest the top of the router on a flat surface.
Step 4 Use the Phillips screwdriver to remove the four screws that hold the top and bottom of the chassis together, as shown in Figure 1.
Step 5 Turn the router back to its original position (right-side up).
Step 6 Gently pull the top of the router (which is facing up toward you) up and away from the bottom of the router (which is resting on the flat surface).
At this point, you might have to disconnect the fan inside the top of the router chassis from the motherboard. Do this by disconnecting the fan cable from the connector (labeled FAN) on the motherboard.
Step 7 Place the router bottom on an antistatic mat, and begin installing the Boot ROM.
Follow the steps in this section to replace the boot ROM.
Step 1 Refer to Figure 2 to locate the installed boot ROM on the motherboard. The socket is beneath the WIC Ø slot. The new boot ROM chip will be installed in this socket.
Step 2 Using the PLCC extraction tool, gently remove the installed boot ROM from the socket, as shown in Figure 3, and set it on a nonconductive surface.
Step 3 Insert the new boot ROM in the socket so that the flat corner on the beveled edge of the ROM chip fits into the flat corner of the ROM socket. (See Figure 4.)
| Caution Make sure to install the boot ROM with the printed label up. Installing the boot ROM with the printed label down damages the boot ROM. |
After installing the Boot ROM on the motherboard, follow these steps to close the chassis:
Step 1 If you disconnected the fan from the motherboard as described in the "Opening the Chassis" section, reconnect the fan cable to the connector labeled FAN on the motherboard.
Step 2 Locate the posts that protrude from the inside of the chassis cover and the corresponding openings on the chassis bottom.
Step 3 Line up the posts with the corresponding openings, as shown in Figure 5, and carefully slide the posts into the openings, taking caution not to damage the router motherboard with the posts.
Step 4 Replace the screws that you removed when opening the chassis. (See Figure 1.)
Step 5 Reinstall any WAN interface card that you removed before opening the chassis.
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Posted: Mon Aug 9 18:23:41 PDT 1999
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