Bull DPX/20, Installing And Maintaining

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4–3
Chapter 4. Upgrading and repairing a storage system
CAUTION These procedures are not a substitute for the use of an ESD kit. Follow them only in
the event of an emergency.
D
Before touching any electronic circuits or boards inside the equipment, firmly
touch a bare (unpainted) metal surface of the equipment.
D
Before removing any replacement or upgrade subassembly from its antistatic bag,
place one hand firmly on an unpainted metal surface of the chassis, and at the
same time, pick up the replacement or upgrade subassembly while it is still sealed
in the antistatic bag. Once you have done this,
do not move around the room or
contact other furnishings, personnel, or surfaces until you have installed and
secured the subassembly in the equipment.
D
Remove the subassembly from the antistatic bag, handling printed-circuit boards
by the edges. Avoid touching components and circuits on a printed-circuit board.
D
If you must move around the room or touch other surfaces before securing the
subassembly in the equipment, first place the subassembly back in the antistatic
bag. When you are ready again to install the subassembly repeat these procedures.
Precautions when removing, installing, or storing CRUs
When removing or installing a CRU, never use excessive force. If you have difficulty
removing or installing a CRU, read the procedures again. Once you have removed a
CRU, handle it gently because a sudden jar or drop could permanently damage it.
Your replacement or add-on CRU is sent to you in a specially designed shipping
container. Store the CRU in this container, and use this container if you need to return
the CRU for repair. The storage location of a disk module, SP, VSC, or fan module
must be maintained within the non-operating limits specified in Appendix A.