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Yamaha A-s300 Service Manual

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    Page 1 A-S500/A-S300 10118 8 SERVICE MANUAL IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifi cally YAMAHA Products, are already known and understood by the users, and have therefore not been restated. WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of...
    Page 2 2 A-S500/A-S300 A-S500/A-S300 1. Critical Components Information Components having special characteristics are marked /  and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. • Meter impedance should be equivalent to 1500 ohms shunted by 0.15 μF. ■ TO SERVICE...
    Page 3 3 A-S500/A-S300 A-S500/A-S300 ■ IMPEDANCE SELECTOR A-S500 (U, C, R, T, A, B, G, L models) A-S300 (R, T, A, B, G, L, J models) ■ FRONT PANELS WARNING: Do not change the setting of the IMPEDANCE SELECTOR switch when the unit power is switched on, as doing so may damage the unit. IMPEDANCE SELECTOR A-S500 A-S300
    Page 4 4 A-S500/A-S300 A-S500/A-S300 A-S500 (U, C models) ■ REAR PANELS A-S500 (R model) A-S500 (T model) A-S500
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