Cisco APP-LSS Встановлення та оновлення - Сторінка 30

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Upgrading Microcode

Replacing Components

Following is the procedure for replacing components on the C2FCIT card:

Step 1

Step 2

Step 3

Caution

straighten a bent pin, use needlenose pliers. If a pin breaks or if the device is installed backwards

when power is turned ON, contact a customer service representative to obtain a replacement

because, in both cases, the device is rendered unusable.

Step 4

Figure 18

Step 5

Step 6

30 Installing and Upgrading the CSC-C2FCIT FDDI Card and Appliques

Referring to Figure 18, locate the microcode EPROM (socket position U32) in the lower

right corner of the C2FCIT card. (With the card in this position, the EPROM label might

appear upside down.) Note the position of the notch (see Figure 18) in the end of the

EPROM and socket so that you can place the new EPROM correctly.

Use a chip extractor to remove the EPROM component from socket U32. If you do not have

a chip extractor available, carefully use the tip of the screwdriver blade to gently pry the

component out of its socket.

Align the notch on the new EPROM (Part Number 17-0876-05) with the notch in the U32

socket. Ensure that the pins are aligned with the socket, then insert the new component. Do

not rely on the orientation of the label to correctly position the new EPROM.

When inserting a new component, be very careful not to break or bend any of the pins. To

Referring to Figure 18, locate the serial PROM component (socket position U34) toward

the rear of the card near the bus connector. Note the position of the notch.

Microcode Components on the C2FCIT Card

FDDI A, E, I, M

FDDI B, F, J, N FDDI C, G, K, O

Use a chip extractor or small ﬂat-blade screwdriver to remove the serial PROM component

from the U34 socket.

Align the notch on the new serial PROM (Part Number 17-0878-04) with the notch in the

U34 socket. Ensure that the pins are aligned with the socket, then insert the new

component.

Serial

PROM

U34

FDDI D, H, L, P

Microcode

EPROM

U32