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SERVICE MANUAL
HAMAMATSU, JAPAN
Copyright (c) Yamaha Corporation. All rights reserved.
’08.08
PK
001810
CONTENTS
(目次)
SPECIFICATIONS ..................................................................... 3
PANEL LAYOUT ........................................................................ 4
CIRCUIT BOARD LAYOUT & WIRING
(ユニットレイアウト及び結線図)
................................... 6
EXTENSION CABLE FOR SERVICE USE
(サービス用延長ケーブル)
.............................................. 7
BLOCK DIAGRAM
(ブロックダイアグラム)
........................... 8
DISASSEMBLY PROCEDURE
(分解手順)
.............................. 9
LSI PIN DESCRIPTION
(LSI 端子機能表)
............................. 16
IC BLOCK DIAGRAM
(IC ブロック図).................................
20
CIRCUIT BOARDS
(シート基板図)
...................................... 21
TEST PROGRAM ................................................................... 33
INITIALIZATION ...................................................................... 37
DATA BACKUP ........................................................................ 38
SYSTEM BOOTING FLOW CHART ....................................... 43
MIDI IMPLEMENTATION CHART
(MIDI インプリメンテーションチャート)
..................... 44
MIDI DATA FORMAT ............................................................... 45
PARTS LIST
OVERALL CIRCUIT DIAGRAM
(総回路図)
PSR-S550
PSR-S550B