Yamaha S90 Manual Page 123

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Basics SectionQuick GuideReferenceAppendix
Installing Optional Hardware
Installing Optional Hardware
Optional units that can
be installed to the S90
Installation locations
Up to three boards can be installed to the rear panel.
Installation Precautions
Before installing the optional hardware, make sure you
have a Philips screwdriver.
• Before beginning installation, switch off the power to
the S90 and connected peripherals, and unplug them
from the power outlet. Then remove all cables
connecting the S90 to other devices. (Leaving the
power cord connected while working can result in
electric shock. Leaving other cables connected can
interfere with work.)
• Be careful not to drop any screws inside the instrument
during installation (this can be prevented by keeping
the optional units and cover away from the instrument
while attaching). If this does happen, be sure to
remove the screw(s) from inside the unit before
turning the power on. Loose screws inside the
instrument can cause improper operation or serious
damage. If you are unable to retrieve a dropped screw,
consult your Yamaha dealer for advice.
• Install the optional units carefully as described in the
procedure below. Improper installation can cause
shorts which may result in irreparable damage and
pose a fire hazard.
• Do not disassemble, modify, or apply excessive force to
board areas and connectors on optional units. Bending
or tampering with boards and connectors may lead to
electric shock, fire, or equipment failures.
• Before handling the optional units, you should briefly
touch the metal surface to which the optional unit
cover is attached (or other such metallic area — be
careful of any sharp edges) with your bare hand so as
to drain off any static charge from your body. Note that
even a slight amount of electrostatic discharge may
cause damage to these components.
• It is recommended that you wear gloves to protect your
hands from metallic projections on optional units and
other components. Touching leads or connectors with
bare hands may cause finger cuts, and may also result
in poor electrical contact or electrostatic damage.
• Handle the optional units with care. Dropping or
subjecting them to any kind of shock may cause
damage or result in a malfunction.
• Be careful of static electricity. Static electricity
discharge can damage the IC chips on the Plug-in
board. Before you handle the optional Plug-in board, to
reduce the possibility of static electricity, touch the
metal parts other than the painted area or a ground
wire on the devices that are grounded.
• Do not touch the exposed metal parts in the circuit
board. Touching these parts may result in a faulty
contact.
• When moving a cable, be careful not to let it catch on
the circuit Plug-in board. Forcing the cable in anyway
may cut the cable, cause damage, or result in a
malfunction.
• Be careful not to misplace any of the screws since all of
them are used.
• Do not use any screws other than what are installed on
the instrument.
mLAN8EPlug-in Boards
mLAN8E cover
Plug-in Board
cover
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