IBM CS821 Service Manual page 29

Procedure
1. Attach the electrostatic discharge (ESD) wrist strap.
Attention:
v Attach an electrostatic discharge (ESD) wrist strap to the front ESD jack, to the rear ESD jack, or to
an unpainted metal surface of your hardware to prevent the electrostatic discharge from damaging
your hardware.
v When you use an ESD wrist strap, follow all electrical safety procedures. An ESD wrist strap is
used for static control. It does not increase or decrease your risk of receiving electric shock when
using or working on electrical equipment.
v If you do not have an ESD wrist strap, just prior to removing the product from ESD packaging and
installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of
5 seconds.
2. Label and remove the drive signal cables (A), the operator console cable (B), and drive power cable
(C) from the system backplane as shown in Figure 11. Using your thumb, press the release latch on
the connector to remove the cable.
Figure 11. Disconnecting the drive signal and power cables
3. Move the fan housings out of the way as shown in Figure 12 on page 14. They do not need to be
disconnected.
Removing and replacing parts
13