Bedienungsanleitung Yamaha A4000 (Seite 234 von 296) (Englisch)

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Installing Optional Equipment

234 Appendix • A5000/A4000 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

Installing SIMMs

You can increase the A5000/A4000’s sampling memory by installing commercially available SIMMs (sin-

gle in-line memory modules). This section explains how to carry out the installation.

The A5000/A4000 does not necessarily support all commercially available SIMMs. Before pur-

chasing SIMMs, please consult your Yamaha dealer or an authorized Yamaha distributor (see

list at end of the Owner’s Manual) for advice. Note that Yamaha cannot assume responsibility

for SIMM malfunctions.

• Before performing the installation, please read precautions “Handling and Installation of Options,”

found at the beginning of this manual.

• You need to use 72-pin SIMMs with access time of 70ns or less. The SIMM module size may be 4MB,

8MB, 16MB, or 32MB. The A5000/A4000 is designed for use with 32-bit (parity non-type) SIMMs, but

can also accept installation of 36-bit (parity-type) SIMMs.

• When purchasing SIMMs, make sure that the SIMM design does not utilize more than 18 memory

chips per module. (SIMMs comprised of more than 18 chips do not operate correctly on the A5000/

A4000.)

• SIMMs must be installed in pairs: you can install either two SIMMs or four SIMMs. Both modules in a

pair must have the same memory capacity.

• The A5000/A4000 ships with 4MB of sampling memory installed, and is capable of accessing up to

128MB. If you add one pair of 32MB SIMMs, for example, you increase the available sampling memory

to a total of (4 + 32 x 2 =) 68MB. If you install four 32MB SIMMs, however, the sampling memory size

becomes 128MB (and the original 4MB are effectively disabled).

• Yamaha recommends that you purchase SIMMs that conform to the JEDEC* standard. Please be

aware, however, that conformance to this standard does not constitute a guarantee that the SIMMs will

operate correctly on the A5000/A4000.

* JEDEC (Joint Electron Device Engineering Council) sets standards for terminal conﬁgurations within elec-

tronic devices.

[Procedure]

1. Be sure that you have the following at hand before starting the installation.

• SIMMs (One or two pairs: 2 or 4 modules)

• Phillips screwdriver: Magnetic-tipped screwdriver is recommended.

• Workbench: Please carry out all work on a stable workbench or table. Spreading a cloth over the work

surface will help prevent scratching.

• Gloves: Be sure to wear gloves so that your hands are not scratched by the metal cover or other metal

parts.

Important Information about Purchase of Expansion SIMMs for the A5000/A4000

SIMM Type and SIMM Conﬁguration

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