Sony STR-ZA3100ES Operating Instructions Manual page 4

Precautions
On safety
Should any solid object or liquid fall into the cabinet, unplug the receiver
and have it checked by qualified personnel before operating it any
further.
On power sources

Before operating the receiver, check that the operating voltage is
identical with your local power supply.
The operating voltage is indicated on the nameplate on the back of the
receiver.

If you are not going to use the receiver for a long time, be sure to
disconnect the receiver from the wall outlet. To disconnect the AC
power cord (mains lead), grasp the plug itself; never pull the cord.
 One blade of the plug is wider than the other for the purpose of safety
and will fit into the wall outlet only one way. If you are unable to insert
the plug fully into the outlet, contact your dealer.

AC power cord (mains lead) must be changed only at a qualified service
shop.
On heat buildup
Although the receiver heats up during operation, this is not a
malfunction. If you continuously use this receiver at a large volume, the
cabinet temperature of the top, side and bottom rises considerably*. To
avoid burning yourself, do not touch the cabinet.
* The top of the cabinet may become too hot to touch.
On placement

Do not install the appliance in a confined space, such as a bookcase.

Sufficient space around the receiver is needed to release heat. When
placing the receiver in a rack, leave more than 44.45 mm (1.75 in) space
above the receiver, and more than 44.45 mm (1.75 in) space along the
sides of the receiver. The rack behind the receiver should be open. If you
place the receiver with its back against the wall, leave more than
88.9 mm (3.5 in) space between the receiver and the wall.
4
US

Make sure to use a "WS-RE1" dedicated rack mount kit for this receiver
when mounting the receiver on a rack mount.
 Place the receiver in a location with adequate ventilation to prevent
heat buildup and prolong the life of the receiver.
 Do not place the receiver near heat sources, or in a place subject to
direct sunlight, excessive dust, or mechanical shock.

Do not place anything on top of the cabinet that might block the
ventilation holes and cause malfunctions.

Magnets are attached to both the front panel and front cover. Do not
place cards with magnetic stripes, such as bank cards or ID passes, near
the receiver. These cards may become unusable due to the effects of
the magnets on the receiver.
On cleaning
Clean the cabinet, panel, and controls with soft dry cloth. Do not use any
type of abrasive pad, scouring powder, or solvent, such as alcohol or
benzine.
If you have any questions or problems concerning your receiver, please
consult your nearest Sony dealer.