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CONTENTS
CIRCUIT BOARD LAYOUT ....................................................................... 5
BLOCK DIAGRAM .................................................................................... 6
DISASSEMBLY PROCEDURE ................................................................. 7
LSI PIN DESCRIPTION .......................................................................... 12
IC BLOCK DIAGRAM ............................................................................. 14
CIRCUIT BOARDS .................................................................................. 15
TEST PROGRAM & INITIALIZE ............................................................... 17
MIDI IMPLEMENTATION CHART ............................................................ 22
SERVICE MANUAL
PK 001617
HAMAMATSU,JAPAN
1.95K-504 I Printed in Japan’99.03
Summary of Contents for PortaTone PSR-270
Page 6: ...PSR 270 6 28CA1 8813220 ...
Page 14: ...PSR 270 14 ...
Page 24: ...PSR 270 2 ...
Page 33: ...PSR 270 C2 Note See parts list for details of circuit board component parts ...