SERVICE MANUALSPECIFICATIONS ..................................................................... 3PERFORMANC GRAPH ............................................................... 4PANEL LAYOUT ......................................................... 4CIRCUIT BOARD LAYOUT .................................... 5DIMENSIONS .............................................................................. 5DISASSEMBLY PROCEDURES ............................................... 6IC BLOCK DIAGRAM ...................................................... 15CIRCUIT BOARDS ........................................................... 15INSPECTIONS ............................................................................... 23PARTS LISTBLOCK & LEVEL DIAGRAMCIRCUIT DIAGRAM CONTENTSPA 011901200805-72450Copyright (c) Yamaha Corporation. All rights reserved. 08.06HAMAMATSU, JAPANMSR250