IBM 7940, Problem Determination And Service Manual, Page: 55 / 160

Note: If you are installing a drive that contains a laser, observe the following
safety precaution.
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices,
or transmitters) are installed, note the following:
v
Do not remove the covers. Removing the covers of the laser product
could result in exposure to hazardous laser radiation. There are no
serviceable parts inside the device.
v Use of controls or adjustments or performance of procedures other
than those specified herein might result in hazardous radiation
exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view
directly with optical instruments, and avoid direct exposure to the
beam.
Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Appareil A Laser de Classe 1
`
2. Read the safety information that begins on page vii and “Installation guidelines”
on page 29.
3. Turn off the server and peripheral devices and disconnect all power cords and
external cables; then, remove the server from the rack.
4. Remove the server cover (see “Removing the cover” on page 31).
Chapter 4. Removing and replacing server components
37