Yamaha PortaTone PSR-A300 Manuale di servizio
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PSR-A300
SERVICE MANUAL
CONTENTS
SPECIFICATIONS .................................................................3
PANEL LAYOUT .................................................................. 4
CIRCUIT BOARD LAYOUT & WIRING ................................ 5
BLOCK DIAGRAM ................................................................ 6
DISASSEMBLY PROCEDURE ............................................. 7
LSI PIN DESCRIPTION ....................................................... 12
IC BLOCK DIAGRAM ......................................................... 14
CIRCUIT BOARDS .............................................................. 15
TEST PROGRAM ...............................................................21
BACKUP & INITIALIZATION ............................................. 24
TRANSFERRING DATA BETWEEN
THE PSR-A300 and a COMPUTER ................................... 25
MIDI IMPLEMENTATION CHART ..................................... 27
MIDI DATA FORMAT ......................................................... 28
PARTS LIST
OVERALL CIRCUIT DIAGRAM
PK
001738
HAMAMATSU, JAPAN
1
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'05.07