 CONTENTSTO SERVICE PERSONNEL .......................................... 2SPECIFICATIONS / ........................................ 3INTERNAL VIEW ........................................................... 4REAR PANELS .......................................................... 4~5DISASSEMBLY PROCEDURES ............. 6~7ADJUSTMENTS / 8~9BLOCK DIAGRAM ....................................................... 10PRINTED CIRCUIT BOARD .................................. 11~12SCHEMATIC DIAGRAM .............................................. 13PARTS LIST ........................................................... 15~23YST-SW225TOP VIEWFRONT VIEWIMPORTANT NOTICEThis 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 specifically 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 expensivecomponents, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service requiredshould be performed by an authorized YAMAHA Retailer or the appointed service representative.IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicabletechnical capabilities, or establish a principle-agent relationship of any form.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA arecontinually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation toretrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to theground buss in the unit (heavy gauge black wires connect to this buss).IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.'04.071 0 0 8 9 5P.O.Box 1, Hamamatsu, JapanSERVICE MANUALSUBWOOFER SYSTEMYST-SW225

subwoofer system

to service personnel

specifications

internal view

disassembly procedures

parts list

Yamaha YST-SW225 Service Manual

YST-SW225

important safety instructions

FEATURES

PLACEMENT

CONNECTIONS

using two subwoofers

the amplifier

Connecting to the INPUT1/ OUTPUT terminals of the subwoofer

CONTROLS AND THEIR FUNCTIONS

AUTOMATIC POWER-SWITCHING FUNCTION

ADJUSTING THE SUBWOOFER BEFORE USE

Frequency characteristics

ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY II

TROUBLESHOOTING

English

Changing the AUTO STANDBY setting

SPECIFICATIONS

Deutsch

BESONDERHEITEN

AUFSTELLUNG

ANSCHLÜSSE

des Verstärkers

BEDIENUNGSELEMENTE UND IHRE FUNKTIONEN

AUTOMATISCHE EINSCHALTFUNKTION

EINSTELLUNG DES SUBWOOFERS VOR DER INBETRIEBNAHME

STÖRUNGSSUCHE

TECHNISCHE DATEN

tekniska data

dati tecnici