SERVICE MANUAL■ CONTENTSSPECIFICATIONS ............................................................3PERFORMANCE GRAPH ...................................................4PANEL LAYOUT ..................................................4CIRCUIT BOARD LAYOUT ..............................5DIMENSIONS ......................................................................5WIRING DIAGRAM ..............................................................6IC BLOCK DIAGRAM ................................................8DISASSEMBLY PROCEDURES ......................................9CIRCUIT BOARDS ...................................................12INSPECTIONS ......................................................................15PARTS LISTBLOCK DIAGRAMOVERALL CIRCUIT DIAGRAMPOWERED SUBWOOFERMSR800WPA 011778200505-115500HAMAMATSU, JAPANCopyright (c) Yamaha Corporation. All rights reserved. PDF-K126 ’05.06このサービ スマニ ュ アルはエ コ パルプ(ECF : 無塩素系漂白パルプ) を使用 し ています。This document is printed on chlorine free (ECF) paper.