279
Appendix
Precautions When
Purchasing DRAM SIMMs
Some of the commercially available DRAM SIMMs
may not work on the EX5/5R/7. Yamaha cannot
be held responsible for malfunction of DRAM
SIMMs. BEFORE purchasing, please consult
(which to buy) the shop where you bought
EX5/5R/7 or your nearest Yamaha (or the
authorized distributor) listed at the end of this
manual.
Important Notices About DRAM SIMM
Type/Configuration.
• You need to use 72-pin DRAM SIMMs (4, 8, 16,
32MB) with the same memory capacity in pairs.
• You need to use DRAM SIMMs with access time of
70ns or less.
• Both types, parity and non-parity types can be used.
It is also possible to use the EDO type.
• DRAM SIMMs corresponding to ECC cannot be
used.
• For the EX5/7 (keyboard), you need to use DRAM
SIMM with its height less than 32mm.
• Yamaha recommends to select the DRAM SIMMs
that meet the standard specification for internal
configuration set by the JEDEC*. However, be aware
that the recommendation does NOT always assure
that the DRAM SIMMs operate with the EX5/5R/7.
* The JEDEC (Joint Electron Device Engineering Council) is a
technical electronic device association. This association sets
regulations for standard terminal configuration in electronic
devices.
How to Install the
Optional Board/
Memory (EX5/7)
The installation method is different depending on the
instrument types, EX5/7 keyboards and EIA sized
module, EX5R. Both methods are explained separately
on the following pages. Read the explanation carefully
for the instrument that you will use. The board and
cable to be used are described in the beginning of each
installation procedure.
For information on how to handle the EX5R, go to page
285.
Preparation
On the EX5/7, there are two types of covers, one is for
optional boards and the other is for memories. Remove
the appropriate cover according to the board/memory
that you will install.
How to Remove the Optional Board
Cover (EXIDO1, EXDGO1, ASIB1)
1Turn the EX power off, and disconnect the power
cord.
2Turn over the keyboard so you can have direct
access to the underside. To protect the Knobs or
Wheels, place the keyboard so the four corners are
supported by something that provides sufficient
support like magazines or cushions.
Be careful not to drop or bump the keyboard and
make sure that it is well balanced before proceeding.
Place the supports at all four corners,
without touching the Knobs and the
Wheels.
View of the keyboard
from the bottom.
Option/E/qx 5/21/98 11:58 AM Page 279