© Copyright IBM Corp. 2021
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Replacing coprocessor batteries
This section describes the way to replace the batteries on the IBM 4769-001 coprocessor.
Two lithium coin cell batteries (Renata CR2477) mounted on the IBM 4769-001 PCIe
Cryptographic Coprocessor supply power to the card’s components, including protected
memory. Your support software or application software can query the coprocessor to determine
whether the batteries need to be replaced.
When shipped from the factory, the protected memory contains a certified device key. If your
coprocessor has been initialized by support software, the protected memory contains secret
data, including a master cryptographic key, user profiles, and user passwords.
Attention:
If you remove either of the batteries without first backing up the power with a fresh
battery, the data in protected memory can be lost. You must provide backup power using a USB
cable connected to the cards USB micro connector. No kit is available from IBM to perform the
battery replacement.
CAUTION: The battery used in this device contains Lithium, which might present a risk of
fire or chemical burn if mistreated. Do not disassemble, heat above 100 degrees Celsius,
burn, incinerate, or crush. Dispose or recycle promptly and properly as instructed by=
local regulations. Replace battery with an equivalent type or module recommended by
the manufacturer only. Use of another battery might present a risk of fire or explosion.
(C049)
Exchange only with Renata CR2477 Coin cell batteries, other brands will not work with
the battery connector. Recycle or discard the battery as instructed by local regulations.
For more country specific battery disposal and recycling information link to:
https://www.ibm.com/ibm/recycle/ww/
Before you begin
To perform the battery replacement, you should have in hand the following:
-
Two Renata CR2477 Coin cell batteries
-
One USB to USB Micro cable and device adequate to provide USB power to this cable.
Procedure
To replace the on-board batteries, follow these steps:
1. Locate and remove the Crypto feature adaptor from the PCIe bus slot following your
systems product removal procedures.
Wear an ESD wrist-strap while handling and installing the card, or take the following
precautions:
•
Limit your movements; this helps prevent static electricity building up around
you.
•
Prevent others from touching the card or other components.
•
Handle the card by its edges only. Do not touch exposed circuitry and
