Yamaha Tyros3 Service Manual page 26

Tyros3
INSTALLING THE OPTIONAL DIMMS
Installing optional DIMMs to the Tyros3 allows you to save large amounts of Voice data created by the Voice Creator function. This sec-
tion explains how to install DIMM memory modules to the Tyros3.
WARNING
• Before beginning installation, switch off the power to the Tyros3 and connected peripherals, and unplug them from the
power outlet. Then remove all cables connecting the Tyros3 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.
• 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 fi re hazard.
CAUTION
• Do not touch the exposed metal parts in the circuit board. Touching these parts may result in a faulty contact.
• Be careful not to misplace any of the screws since all of them are used.
• Be careful of static electricity. Static electricity discharge can damage the DIMMs or the instrument. Before you handle
the DIMMs, to reduce the possibility of static electricity, touch some unpainted metal surface or a ground wire on a
device that is grounded.
• Do not use any screws other than what are installed on the instrument.
Compatible DIMMs
The Tyros3 does not necessarily support all commercially
available DIMMs. Yamaha cannot guarantee operation of
DIMMs that you purchase. Before purchasing DIMMs, see the
following page:
http://music-tyros.com/
DIMM Type and DIMM Confi guration
• Yamaha recommends that you purchase DIMMs that
conform to the JEDEC* standard. Please be aware, however,
that conformance to this standard does not constitute a
guarantee that the DIMMs will operate correctly on the
Tyros3.
* JEDEC (Joint Electron Device Engineering Council)
sets standards for terminal configurations within
electronic devices.
• Use only 168-pin DIMMs of 64, 128, 256 or 512 MB
capacity (synchronized DRAM; PC100 or PC133).
• Use only DIMMs that have a height of 38.2 mm or less.
• When installing DIMMs, make sure to install them in a
matched pair of the same capacity. You cannot install only
one module and leave the second memory socket open.
Also make sure each DIMM in the pair is of the same
manufacturer and the same type. DIMMs of different makers
and confi gurations may not work together.
• When purchasing DIMMs, make sure that the DIMM design
does not utilize more than 18 memory chips per module.
(DIMMs comprised of more than 18 chips do not operate
correctly on the Tyros3.)
DIMM Installation
Before following the steps below, make sure you have
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appropriate DIMMs and a Phillips screwdriver.
1
Turn the Tyros3's power off, and disconnect
any cables including AC power cord from the
keyboard.
Also make sure to close the LCD panel and disconnect a
USB device from the USB TO DEVICE terminal.
2
Turn the Tyros3 face down on a blanket or some
soft surface, giving you direct access to the
bottom of the instrument.
3
Remove the four screws from the cover.
Cover