Chapter 3 Removal and Replacement Procedures (RRPs)
Replacement 12 KIT PWBA ESS (PL8.1.99)
Note: Ensure proper electrostatic discharge procedures are followed to prevent damage to the
PWBA ESS and options during replacement.
Note: The replacement steps of procedure 1) to 3) are to be required for changing the PWBA
ESS. Those steps are not required for only removing it.
Note: There are two ROM chips that must be moved from the original PWBA ESS to the
replacement PWBA. Ensure both these chips are installed into the same locations on the
Note: Avoid applying excessive pressure when removing and replacing the ROM chips.
Note: Take care not to bend the terminal section of ROM when carrying out the job described
1) Remove the ROMs, using a miniature
screwdriver or the like, from the IC sockets
on old PWBA ESS that was removed from
2) Remove the ROMs from IC socket on
new PWBA ESS using a miniature
screwdriver or the like.
Note: Do not use ROMs removed from new PWBA ESS.
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