This Yamaha A4000-A5000 Service Manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has beenassumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, arealready known and understood by the users, and have therefore not been restated. Failure to follow appropriate service and safety procedures when servicing this product mayresult in personal injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all Yamaha product owners that all servicerequired should be performed by an authorized Yamaha Retailer or the appointed servicerepre sentative. This presentation or sale of this manual to any individual or firm does not constitute authoriza-tion, certification, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The researchengineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifica-tions are, therefor, inevitable and changes in specification sre subject to change without notice or obligation toretrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division. Static discharges can destroy expensive components. Discharge any static electricity yourbody may have accumulated by grounding yourself to the ground buss in the unit (heavy gaugeblack wires connect to this buss). Turn the unit OFF during disassembly and parts replacement. Recheck all work before youapply power to the unit.
The solder used in the production of this product contains LEAD. In addition, other electrical / electronic and / orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare Agency (and possibly other entities) to cause cancer and / or birth defects or other reproductive harm. Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes orexpose eyes to solder / flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your handsbefore handling food. Components having special characteristics are marked and must be replaced with parts having specification equal to thoseoriginally installed.
Yamaha A4000-A5000 Service Manual tables of content : specifications, panel layout, circuit board layout, block diagram, disassembly procedure, lsi pin description, IC block diagram, test program, error message, midi data format, midi implementation chart, part list, overall circuit diagram, circuit boards.
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