
Replacing the Boot ROMs in the Cisco 2500 Series and AccessPro PC Card Routers 17
Replacing the Boot ROMs—All Models
Figure 17 Boot ROM Locations—Cisco 2521 and Cisco 2523 Routers
Step 2
Using a PLCC extraction tool, gently remove the boot ROMs (see Figure 18) and set them
aside on a nonconductive surface.
H6349
System-code SIMMs
sockets
Flash card
J1
U3
DRAM SIMM
socket
Fixed DRAM
Token RingSerial 0 Serial 1 Serial 2 Serial 3 UTP BRI 0 Console
Auxiliary
J17J16J15J14J13
J21J20J19J18
Boot ROMs
A
B
A
B
A
B
Boot ROM
jumper
FW2
FW1
J6
J4
J3
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