User manual YAMAHA YM-4900A

[. . . ] Holding the rail section can result in the instrument dropping or falling off. Moving the instrument up or down stairs should never be done with the instrument assembled. Doing so is a danger as parts can fall off, or you can loose balance causing the instrument to fall over. [. . . ] · Locations subject to vibrations. Handling · Never place an object on or lean against the instrument, as this may cause damage to the tone bars and frame parts or topple the instrument, which is extremely dangerous. · Do not use hand orchestra bell mallets or other hard objects on your marimbas. The resulting dents or scratches in the tone bars could impair the sound. Moving and Transporting the Instrument · Before moving the instrument, make sure that the caster brakes are released. Also make sure to lift the instrument slightly when moving over rough surfaces. · When the instrument must be transported to a different location, disassemble it to the same state as when it was purchased (See page 22. ), taking care to pack each component properly. Disassembly steps are in the opposite order of assembly. When Not in Use · Always engage the caster brakes. Maintenance · The tone bars should be polished from time to time using a soft and dry cloth or silicone cloth. Stains that cannot be removed with a dry cloth may be wiped off using a small amount of ethyl alcohol. Never use thinner or benzene or a wet cloth for cleaning purplses. Keep This Manual for Future Reference · After reading, make sure to keep the manual in a safe place. Assembly Cautions · When assembling/disassembling the instrument, do so with at least two persons and follow the instructions outlined in this manual. Assembly in the wrong order can cause the pipes to drop which may result in an injury, impair the performance functionality of the instrument or cause noise. · After final adjustment of the legs the fixing screws must be tightened securely to prevent loosening. Looseness may cause the instrument to shift during performance and can also cause noise and other problems. Retighten the screws from time to time. 20 Thank you for purchasing the YAMAHA concert marimbas. We, at YAMAHA, aiming principally at beautiful sounds and playing ease, have made strenuous efforts in creating the outstanding instruments and selecting high quality materials, and successfully developed these marimbas. We are convinced that you will enjoy playing your instrument that produces spreading and yet deep sounds as well as rich volume to your content. Please read it thoroughly to ensure that your instrument will give you enjoyment for a long time. NOMENCLATURE YM-5100A/4900A/4600A/4100A * The illustration shows model YM-5100A. For this reason, the illustrations may not match with the YM-4900A, YM-4600A, and YM-4100A. Frame end (Large end) Natural tone bars Accidental tone bars Frame end (Small end) Leg (Large end) Slide guide Rail Gas spring Resonators (Natural tone side) Reinforcement stay Caster Slant shaft Resonators (Accidental tone side) Caster (with brake) Leg (Small end) 21 CONFIRMATION OF PACKING CONTENTS The shipping carton of your marimba should contain the parts shown below. [. . . ] While tapping each tone bar, move the resonance regulator to find the position where the best resonance is obtained and fix it there. * When fixing the resonance regulator, check to ensure that it is not aslant. Resonance regulator 28 ASSEMBLY YM-4600A/4100A Only 5-2. As YM-4600A/4100A does not have a resonance regulator, insert resonators into resonator holders as shown below. * The resonators are factory adjusted so that the optimum resonance level is obtained at 23°C. [. . . ]