Yamaha Portatone PSR-540 Manual de servicio
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SERVICE MANUAL
CONTENTS
SPECIFICATIONS ...................................................................................... 3
PANEL LAYOUT ....................................................................................... 4
CIRCUIT BOARD LAYOUT ....................................................................... 5
Block Diagram .................................................................................... 6
DISASSEMBLY PROCEDURE ................................................................. 7
Lsi Pin Description ............................................................................ 9
Ic Block Diagram ............................................................................. 11
CIRCUIT BOARDS .................................................................................. 12
TEST PROGRAM & INITIALIZE ............................................................... 16
MIDI IMPLEMENTATION CHART ............................................................ 18
PARTS LIST
PK
001629
HAMAMATSU,JAPAN
1.45K-536 I Printed in Japan'99.06