Yamaha DTX900 Owner's Manual - Page 147

Appendix Optional DIMM Installation This section explains how to install DIMM memory modules to the DTX900. Installation Precautions WARNING • Before beginning installation, switch off the power to the instrument and connected peripherals, and unplug them from the power outlet. Installation or removal of any devices should be started ONLY after the instrument (and the optional hardware) returns to normal room temperature. Then remove all cables connecting the instrument 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. CAUTION • 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. • Be careful of static electricity. Static electricity discharge can damage the IC chips on the DIMM. Before you handle the optional DIMM, to reduce the possibility of static electricity, touch unpainted metal parts or a ground wire on the devices that are grounded. • Handle the optical units with care. Dropping or subjecting them to any kind of shock may cause damage or result in a malfunction. • 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. NOTICE • Do not use any screws other than what are installed on the instrument. Use of incorrect screws can cause damage. DIMM Type and DIMM Configuration • 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 DTX900. * JEDEC (Joint Electron Device Engineering Council) sets standards for terminal configurations within electronic devices. • Use only 168-pin DIMMs of 64, 128 or 256 MB capacity (synchronized DRAM; PC100 or PC133). • 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 configurations 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 DTX900.) 64MB x 2 = 128MB 128MB x 2 = 256MB 256MB x 2 = 512MB Compatible DIMMs The DTX900 does not necessarily support all commercially available DIMMs. Yamaha cannot guarantee operation of DIMMs that you purchase. Before purchasing DIMMs, please consult your Yamaha dealer, or an authorized Yamaha distributor (see list at end of the Owner's Manual) for advice, or visit the following website: http://www.yamaha.co.jp/english/product/drums/ed/ Appendix 147 DTX900 Owner's Manual