IBM 704 - Manual (Page 93)

Electrical Safety
Electrical Safety
For your safety, always do the following before removing the cover:
1. Turn off the server and any attached devices, such as printers,
monitors, and external drives.
2. If you are in the United Kingdom and have a modem or fax
machine attached to your server, you must disconnect the
telephone line from the server before unplugging any power
cords (also known as power cables). When reassembling your
server, you must reconnect the telephone line after you plug in
the power cords.
3. Unplug all the power cords from electrical outlets.
4. Disconnect all communication cables from external receptacles.
5. Disconnect all cables and power cords from the back of the
server.
Note: Reconnect the cables or power cords only after you
reassemble the server and put the covers back on.
4
CAUTION:
Never remove the cover on a power supply. Hazardous
voltage, current, and energy levels are present inside the
power supplies. There are no serviceable parts inside the
power supplies. If you suspect a problem with a power
supply, contact an IBM service technician.
Chapter 4. Installing Options 75